CN109406566B - Nano fluid impact jet flow heat exchange characteristic and erosion wear performance experimental device - Google Patents
Nano fluid impact jet flow heat exchange characteristic and erosion wear performance experimental device Download PDFInfo
- Publication number
- CN109406566B CN109406566B CN201810844658.9A CN201810844658A CN109406566B CN 109406566 B CN109406566 B CN 109406566B CN 201810844658 A CN201810844658 A CN 201810844658A CN 109406566 B CN109406566 B CN 109406566B
- Authority
- CN
- China
- Prior art keywords
- nozzle
- working medium
- target
- experiment
- jet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
- G01N3/567—Investigating resistance to wear or abrasion by submitting the specimen to the action of a fluid or of a fluidised material, e.g. cavitation, jet abrasion
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a device for testing the heat exchange characteristic and the erosion wear performance of nanometer fluid impact jet flow, which comprises: the device comprises a nano fluid conveying pipeline, a straight pipe section, a nozzle, a temperature detection device and a heating device; the inlet end of the nanofluid conveying pipeline can be communicated with the nanofluid liquid storage tank, the outlet end of the nanofluid conveying pipeline is communicated with the inlet end of the straight pipe section, and the outlet end of the straight pipe section is provided with a nozzle which is used for spraying nanofluid jet; the nano fluid conveying pipeline is sequentially provided with a pump and a flowmeter from an inlet end to an outlet end, and the pump is used for providing power for nano fluid; the temperature detection device is used for detecting the temperature of the target to be tested and the temperature of the nanofluid at the outlet of the nozzle; the heating device is used for placing and heating the target material. The invention can simulate the nanometer fluid impact cooling process in the actual engineering through the nanometer particle jet impact target material test piece, and can be used for researching the flowing heat exchange characteristic and the erosion abrasion performance of the nanometer fluid impact jet.
Description
Technical Field
The invention belongs to the technical field of heat and mass transfer in the energy power industry, and particularly relates to a device for testing the heat exchange characteristic and the erosion wear performance of the flow of nanometer fluid impact jet.
Background
The jet flow impingement cooling has very high-efficiency enhanced heat exchange capability, and particularly after a novel nano fluid working medium is introduced, the heat exchange performance is further remarkably improved. Jet impingement cooling can not only significantly enhance heat exchange, but also flexibly adjust an impact target to adapt to various complex environments, and is widely applied to various industrial fields as an enhanced heat exchange technology, such as nuclear power high-temperature component cooling, cutting device cooling in manufacturing industry, microelectronic equipment heat dissipation and the like. However, the introduction of nanofluid working media can cause erosive wear to a cooled target device during the process of enhancing heat and mass transfer, thereby shortening the service life of the device and increasing additional potential safety hazards during the operation of the device. Therefore, the method is very important for researching the erosion and abrasion problem in the high-efficiency heat exchange enhancing technology of nano fluid working medium jet impact. The intensive research on the problem can provide powerful guarantee for the technology to be widely applied to engineering practice to play due role, but the related research is deficient due to the lack of corresponding experimental devices. At present, a simulation experiment device and a method for researching the heat exchange characteristics and the erosion wear performance of the nanometer fluid impact jet flow are needed.
Disclosure of Invention
The invention aims to provide a device for testing the heat exchange characteristic and the erosion wear performance of the flow of the nanometer fluid impact jet so as to solve the existing technical problems. According to the experimental device and the method for researching the impact jet performance of the nano fluid, the impact cooling process of the nano fluid in practical engineering can be simulated by impacting the target material test piece through the nano fluid jet, and the experimental device and the method can be used for researching the flow heat exchange characteristic and the erosion wear performance of the nano fluid impact jet.
In order to achieve the purpose, the invention adopts the following technical scheme:
a nanofluid impact jet flow heat exchange characteristic and erosion wear performance experimental device comprises: the device comprises a nanofluid conveying pipeline, a straight pipe section, a nozzle, a temperature detection device, a heating device, a cylinder body and an impurity removal circulating device; the inlet end of the nanofluid delivery pipe can be communicated with the nanofluid liquid storage tank, the outlet end of the nanofluid delivery pipe is communicated with the inlet end of the straight pipe section, the outlet end of the straight pipe section is provided with a nozzle, the nozzle extends into the cylinder body, and the nozzle is used for spraying nanofluid jet; the target to be tested can be placed in a cylinder body, the outlet of the cylinder body is connected with an impurity removal circulating device, and the impurity removal circulating device is used for removing eroded target solid particles carried in fluid to purify fluid working media; the nano fluid conveying pipeline is sequentially provided with a pump and a flowmeter from an inlet end to an outlet end, and the pump is used for providing power for nano fluid; the temperature detection device is used for detecting the temperature of a target material to be tested and the temperature of the nanofluid at the outlet of the nozzle; the heating device is used for placing and heating the target material.
Furthermore, a flow rate fine adjustment valve is arranged between the pump and the flowmeter of the nano fluid conveying pipeline.
Further, the device also comprises a nozzle converter; the plurality of nozzles are mounted on a nozzle changer, which is mounted at the outlet end of the straight tube section.
Further, the device also comprises a distance adjuster between the nozzle and the target material; the distance regulator between the nozzle and the target material is arranged on the straight pipe section; the distance regulator between the nozzle and the target comprises a gear and an operating rod; the outer wall of the straight pipe section is fixedly provided with a rack, a gear is meshed with the rack and is fixedly connected with the operating rod.
Further, the device also comprises an angle adjusting and heating device; the angle adjusting and heating device comprises an operating rod and a heating device; heating device and action bars fixed connection, heating device are used for placing the target of waiting to experiment and are used for the target heating of waiting to experiment of placing.
Further, the device also comprises an intermittent jet flow controller; the intermittent jet flow controller is arranged between the nozzle and the target material to be tested; the discontinuous jet controller comprises a blocking sheet which can block the nano fluid sprayed by the nozzle at a preset frequency.
Furthermore, the device also comprises an accelerated experiment device; the accelerated experiment device comprises an accelerated experiment working medium mixing cavity and an accelerated wear particle storage tank; the acceleration experiment working medium mixing cavity is provided with an acceleration experiment working medium outlet, an acceleration experiment solid working medium particle inlet and an acceleration experiment working medium solvent inlet; the accelerating experiment working medium outlet is communicated with the inlet end of the straight pipe section; the accelerated test solid working medium particle inlet is communicated with an outlet of the accelerated wear particle storage tank through an accelerated test solid working medium particle conveying pipeline, and a working medium concentration control valve is arranged on the accelerated test solid working medium particle conveying pipeline; the accelerated experiment working medium solvent inlet can be communicated with the accelerated experiment working medium solvent storage tank outlet through an accelerated experiment working medium solvent conveying pipeline, and a pump and a flowmeter are sequentially arranged on the accelerated experiment working medium solvent conveying pipeline from the inlet to the outlet.
Further, the impurity removal circulating device comprises a nanofluid heat exchange pipe, a cooling liquid pipeline, a water storage tank and a nanofluid liquid storage tank; the cylinder body is provided with a nano fluid discharge port and an accelerated experiment working medium discharge port; the nanometer fluid discharge port of the cylinder body is communicated with the inlet of the nanometer fluid liquid storage tank through the nanometer fluid heat exchange tube, and the outlet of the nanometer fluid liquid storage tank is communicated with the inlet end of the nanometer fluid conveying pipeline; the nanofluid heat exchange tube is arranged in the cooling liquid pipeline; the accelerated test working medium outlet of the cylinder body is communicated with the inlet of the water storage tank, and the outlet of the water storage tank is communicated with the inlet of the accelerated test working medium solvent conveying pipeline.
Further, edulcoration circulating device includes: the nano fluid heat exchange tube, the cooling liquid pipeline and the nano fluid liquid storage tank are arranged on the upper surface of the shell; the cylinder body is provided with a nanometer fluid outlet; the nanometer fluid discharge port of the cylinder body is communicated with the inlet of the nanometer fluid liquid storage tank through the nanometer fluid heat exchange tube, and the outlet of the nanometer fluid liquid storage tank is communicated with the inlet end of the nanometer fluid conveying pipeline; the nanofluid heat exchange tube is arranged in the cooling liquid pipeline.
Compared with the prior art, the invention has the following beneficial effects:
the simulation experiment device for researching the impact jet performance of the nano fluid can simulate the nano fluid jet with different speeds in actual engineering by adjusting the jet speed of the nozzle through the pump and the flowmeter; detecting the temperature of the nano fluid jet flow sprayed out from the nozzle and the surface temperature of the target material through a temperature detection device, and determining the heat flux density of the target material through a heating device; jet impact heat exchange performance research under the jet velocity of the corresponding nozzle can be carried out by combining the knowledge of the heat exchange theory; extracting the target according to a preset time course, and researching the erosion and wear performance of the target under different nozzle jet velocities through the detection of the three-dimensional topography characteristics of the surface of the target and the measurement of the weight loss of the target; the simulation experiment device provided by the invention can be used for researching the flow heat exchange characteristic and the erosion wear performance of the nanometer fluid impact jet flow. The selection of the obviously enhanced heat exchange working condition can be realized through the comparative analysis of the experimental results, and a reliable basis is provided for the service life evaluation of the materials used in the engineering under the condition.
Furthermore, the flow velocity fine adjustment valve, the pump and the flowmeter are matched for use, so that the accurate fine adjustment and measurement calibration of the jet velocity of the nozzle can be realized, and the accuracy and reliability of a simulation experiment research result can be improved.
Further, set up the nozzle converter, be convenient for according to the experiment needs the nozzle of different types or specification of quick replacement, can improve experimental efficiency, the operation of being convenient for can realize being applicable to the nimble switching of the corresponding nozzle of different purpose experimental apparatus.
Furthermore, the distance between the nozzle and the target can be adjusted through the distance adjuster between the nozzle and the target, the research on the flow heat exchange characteristic and the erosion wear performance of the nanometer fluid impact jet flow under different distances between the nozzle and the target can be realized, the simulation research range of a simulation experiment device can be increased, and the accuracy and the reliability of the research result of the simulation experiment can be enhanced; the rotating operation rod drives the gear to rotate, the gear is meshed with the rack, and the rack drives the straight pipe section to move, so that the nozzle is driven to move, and the distance between the nozzle and the target is adjusted.
Furthermore, the jet impact angle can be adjusted by the arranged angle adjusting and heating device, so that the research on the flow heat exchange characteristic and the erosion abrasion performance of the nano fluid impact jet under the working conditions of different jet impact angles and different environmental temperatures can be realized, the simulation research range of the simulation experiment device can be enlarged, and the accuracy and the reliability of the research result of the simulation experiment can be enhanced; the target is placed on the heating device, the temperature of the target can be changed through the heating device, and performance simulation research at different temperatures is realized; the rotating operation rod drives the heating device and the target placed on the heating device to rotate, so that the jet impact angle can be changed, and the performance simulation research under different jet impact angles can be realized.
Furthermore, the intermittent jet flow form can be simulated through the intermittent jet flow controller, the jet flow of the nozzle is blocked by the blocking piece at a preset frequency, the research on the flow heat exchange characteristic and the erosion abrasion performance of the nanometer fluid impact jet flow under the working condition of intermittent impact on the target can be realized, the simulation research range of the simulation experiment device can be enlarged, and the accuracy and the reliability of the research result of the simulation experiment can be enhanced.
Furthermore, the experiment period required for the nano fluid to erode the target material to achieve an obvious abrasion effect is long, and the experiment efficiency can be improved by arranging an accelerated experiment device and adopting a particle solution with large mass, hardness, size and concentration to replace the nano fluid to accelerate the erosion abrasion. The accelerated experiment device can shorten the time required by the nano-fluid erosion experiment to achieve an obvious effect.
Furthermore, by arranging the impurity removal circulating device, the working medium can be recycled, and the influence on the surrounding environment can be avoided; in addition, through setting up edulcoration circulating device, can make simulation experiment device form closed loop, be convenient for use in the laboratory.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a simulation experiment device for studying the properties of a nano-fluid impact jet according to the present invention;
FIG. 2 is a schematic front view of the distance adjusting device between the nozzle and the target shown in FIG. 1;
FIG. 3 is a side view schematic of the structure of FIG. 1;
FIG. 4 is a schematic structural diagram of the accelerated test working medium mixing chamber in FIG. 1;
FIG. 5 is a schematic view of the nozzle changer of FIG. 1;
FIG. 6 is a schematic view of the structure of the trash removal device of FIG. 1;
FIG. 7 is a schematic structural view of the nanofluid heat exchange tubes and coolant lines of FIG. 1;
FIG. 8 is a schematic top view of the recycling selector of FIG. 1;
in fig. 1 to 8, 1. a motor control cabinet; 2. a pump; 3. a flow rate fine adjustment valve; 4. a flow meter; 5. accelerating the experimental working medium mixing cavity; 6. an accelerated wear particle storage tank; 7. a working medium concentration control valve; 8. a straight pipe section; 9. a cylinder body; 10. a distance adjuster between the nozzle and the target material; 11. a nozzle changer; 12. a nozzle; 13. an intermittent jet controller; 14. a target material; 15. a jet impact angle adjuster; 16. a target electric heater; 17. a working medium recovery selector; 18. a nanofluid heat exchange tube; 19. a coolant line; 20. a temperature controller; 21. accelerating the liquid discharge pipe of the experimental working medium; 22. a nano fluid working medium liquid discharge pipe; 23. accelerating the filter screen of experimental working medium; 24. a nano fluid working medium filter screen; 25. the pump protects the filter screen; 26. a water storage tank; 27. a nanofluid reservoir; 28. an operation table; 29. an accelerated test working medium outlet; 30. an inlet for solid working medium particles for an acceleration experiment; 31. accelerating the inlet of experimental working medium solvent.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
Referring to fig. 1, the device for experimental study of heat exchange characteristics and erosive wear performance of nano fluid impinging jet flow of the invention comprises: the device comprises a nanometer fluid conveying pipeline, a straight pipe section 8, a nozzle 12, a temperature detection device, a heating device, a distance regulator 10 between the nozzle and a target material, an accelerated experiment device and an impurity removal circulating device.
Referring to fig. 1 and 5, the inlet end of the nano-fluid delivery pipe can be communicated with a nano-fluid reservoir 27, the outlet end of the nano-fluid delivery pipe is communicated with the inlet end of the straight pipe section 8, the outlet end of the straight pipe section 8 is provided with a nozzle 12 through a nozzle converter 11, the nozzle 12 is used for spraying nano-fluid jet, a plurality of nozzles 12 are arranged on the nozzle converter 11, and the nozzle converter 11 is arranged at the outlet end of the straight pipe section 8; the nozzles 12 with different purposes are arranged on the nozzle converter 11, the nozzles 12 can be quickly replaced by rotating the nozzle converter 11, the experimental efficiency can be improved, and the operation is convenient; the nozzle in the accelerated experiment device has larger diameter and high requirement on wear resistance, and the nozzle in the target surface cleaning device adopts a porous structure with larger diameter so as to be beneficial to cleaning the target 14 in a large range and eliminate the erosion effect of the jet flow of the cleaning liquid. The specific embodiment is as follows: the nozzle form diverse that the experimental apparatus of different purposes used, in order to avoid loaded down with trivial details dismantlement installation in order to guarantee that the experiment goes on high-efficient stable, nozzle converter 11 combines three nozzles 12 of difference together to realized nimble convenient switching each other. In addition, the nozzle 12 is connected with the nozzle converter 11 and the straight pipe section 8 through a thread structure, so that the replacement of the nozzle 12 with different sizes and the cleaning and maintenance of the nozzle converter 11 are facilitated. The nano fluid conveying pipeline is sequentially provided with a pump 2, a flow velocity fine adjustment valve 3 and a flowmeter 4 from an inlet end to an outlet end, the pump 2 is used for providing power for nano fluid, and the pump 2 is connected with the motor control cabinet 1; pump 2 is experiment power device, realizes the preliminary regulation to nozzle jet velocity through motor control cabinet 1 that links to each other with it, carries out accurate fine setting by velocity of flow fine adjustment valve 3 again to measure the calibration through flowmeter 4. Through the matching use of the flow rate fine adjustment valve 3, the pump 2 and the flowmeter 4, the accurate fine adjustment and measurement calibration of the jet speed of the nozzle 12 can be realized, and the accuracy and reliability of the whole simulation experiment research result can be improved. The concrete form can be as follows: the pump 2 is a variable frequency pump 2, and a flow rate fine adjustment valve 3 and a flow meter 4 are arranged at the outlet of the pump 2 to realize the accurate fine adjustment and calibration of different jet velocities.
The temperature detection device is used for detecting the temperature of the target material 14 to be tested and the temperature of the nanofluid at the outlet of the nozzle 12; the heating device is used to place the target 14 and heat the target 14. The heating device is an angle adjusting heating device and comprises a jet impact angle adjuster 15 and a target electric heater 16, and the target electric heater 16 is arranged on the angle adjuster 15; the angle adjusting and heating device comprises an operating rod and a heating device; heating device and action bars fixed connection, heating device are used for placing wait to experiment target 14 and are used for the target 14 heating of waiting to experiment of placing. The specific mode is as follows: the angle adjusting heating device comprises a rotating shaft and a target electric heater 16; the target 14 is integrated in a way of being embedded into a groove on the upper surface of the target electric heater 16, the target electric heater 16 is rotatably arranged on the transmission cylinder body 9 through a rotary shaft marked with scales, and then the jet impact angle can be adjusted through adjusting the angle of the rotary shaft. The target 14 is fixed by embedding it into a groove on the upper surface of the electric heater 16, and the fixed part is made of plastic polymer material to prevent electrochemical corrosion. By arranging the angle adjusting heating device, the research on the flow heat exchange characteristic and the erosion wear performance of the nanometer fluid impact jet under the working conditions of different jet impact angles and different environmental temperatures can be realized, the simulation research range of the simulation experiment device can be enlarged, and the accuracy and the reliability of the research result of the simulation experiment can be enhanced; the target is placed on the heating device, the temperature of the target can be changed through the heating device, and performance simulation research at different temperatures is realized; the rotating operation rod drives the heating device and the target placed on the heating device to rotate, so that the jet impact angle can be changed, and the performance simulation research under different jet impact angles can be realized. In addition, a device for automatically bouncing the target 14 is also arranged in the groove so as to be convenient for extracting the target 14 for measurement. The heating device is an electric heater. The temperature detection device comprises a thermocouple; the thermocouple is placed directly within the target 14. The experimental device is also provided with a PIV and a high-speed camera for observation and recording. According to the invention, the temperature difference between the target surface and the jet flow at the outlet of the nozzle and the heat flow density value provided by the target electric heater can be respectively calculated by measuring the temperature of the target surface by the thermocouple in the target, measuring the heat provided by the target electric heater and combining the temperature of the jet flow nano fluid at the outlet of the nozzle and the measurement of the geometric parameters of the target surface. Then, the heat exchange performance in the jet flow impact process is represented by calculating the Knoop number in the process that the jet flow of the nozzle impacts the target surface, so that the flowing heat exchange characteristic in the nano fluid jet flow impact process can be researched. And detecting the erosion wear three-dimensional morphology of the target surface by using a surface finish instrument and a scanning electron microscope, and measuring the maximum height and the average height of the erosion pits on the surface of the target material, the range of the erosion surface of the target surface and morphological characteristics. And accurately weighing the weight of the target material after cleaning and drying before and after the experiment by using an electronic balance, and then comparing to obtain the erosion abrasion loss. And analyzing the erosion wear performance of the target by the impact jet by means of the three-dimensional feature of the erosion surface of the target and the erosion wear amount. The simulation experiment device for researching the impact jet performance of the nano fluid can simulate the nano fluid jet with different speeds in the actual engineering by adjusting the jet speed of the nozzle 12 through the pump 2 and the flowmeter 4; detecting the temperature of the nano-fluid jet flow sprayed out of the nozzle 12 and the surface temperature of the target 14 through a temperature detection device, and determining the heat flux density of the target 14 through a heating device; jet impact heat exchange performance research under the jet velocity of the corresponding nozzle 12 can be carried out by combining the knowledge of the heat exchange theory; extracting the target 14 according to a preset time course, and researching the erosion wear performance of the target 14 at different jet velocities of the nozzle 12 through detecting the three-dimensional topography characteristics of the surface of the target 14 and measuring the weight loss of the target 14; the simulation experiment device provided by the invention can be used for researching the flow heat exchange characteristic and the erosion wear performance of the nanometer fluid impact jet flow.
An intermittent jet flow controller 13 is also arranged for realizing the intermittent jet flow form; the intermittent jet flow controller 13 is arranged between the nozzle 12 and the target 14 to be tested; the intermittent jet controller 13 includes a blocking plate that can rotate at a predetermined frequency to block the nanofluid ejected from the nozzles 12, forming a spaced jet pattern. The specific scheme is as follows: in order to ensure the jet speed of the outlet of the nozzle 12 and the stability of the working state of the pump 2 and realize the intermittent jet form, an intermittent jet controller 13 is arranged between the outlet of the nozzle 12 and the target 14, and the jet is correspondingly blocked by rotating high-hardness sheet metal with certain width, wear resistance and corrosion resistance at a specific frequency, so that the effect of intermittently impacting the target surface is realized. The intermittent jet flow form can be simulated through the intermittent jet flow controller 13, the jet flow of the nozzle 12 is blocked by the blocking piece at a preset frequency, the research on the flow heat exchange characteristic and the erosion abrasion performance of the nanometer fluid impact jet flow under the working condition of intermittently impacting the target 14 can be realized, the simulation research range of the simulation experiment device can be enlarged, and the accuracy and the reliability of the research result of the simulation experiment can be enhanced.
Referring to figures 2 and 3, a nozzle-to-target distance adjuster 10 is mounted in the straight tube section 8; the nozzle-to-target distance adjuster 10 includes a gear and an operation rod; the outer wall of the straight pipe section 8 is fixedly provided with a rack, a gear is meshed with the rack and is fixedly connected with the operating rod. The graduated nozzle-to-target distance adjuster 10 is geared to the straight tube section 8 to achieve precise and stable adjustment of the distance between the nozzle 12 and the target 14. According to the invention, the distance regulator 10 between the nozzle and the target is arranged, so that the distance between the nozzle 12 and the target 14 can be regulated, the research on the flow heat exchange characteristic and the erosion abrasion performance of the nanometer fluid impact jet flow under different distances between the nozzle 12 and the target 14 can be realized, the simulation research range of a simulation experiment device can be enlarged, and the accuracy and the reliability of the research result of the simulation experiment can be enhanced; the rotating operating rod drives the gear to rotate, the gear is meshed with the rack, and the rack drives the straight pipe section 8 to move, so that the nozzle 12 is driven to move, and the distance between the nozzle 12 and the target 14 is adjusted.
Referring to fig. 1 and 4, the accelerated experiment device comprises an accelerated experiment working medium mixing cavity 5 and an accelerated wear particle storage tank 6; the accelerated experiment working medium mixing cavity 5 is provided with a partition plate, an accelerated experiment working medium outlet 29, an accelerated experiment solid working medium particle inlet 30 and an accelerated experiment working medium solvent inlet 31, the partition plate divides the accelerated experiment working medium mixing cavity 5 into a mixing area and a conveying area, the mixing area is communicated with the accelerated experiment solid working medium particle inlet 30 and the accelerated experiment working medium solvent inlet 31, the output area is communicated with the accelerated experiment working medium outlet 29, and the solid working medium particles and the working medium solvent can be fully mixed by arranging the partition plate; the accelerated test working medium outlet 29 is communicated with the inlet end of the straight pipe section 8; the accelerated test solid working medium particle inlet 30 is communicated with an outlet of the accelerated wear particle storage tank 6 through an accelerated test solid working medium particle conveying pipeline, and a working medium concentration control valve 7 is arranged on the accelerated test solid working medium particle conveying pipeline; the accelerated experiment working medium solvent inlet 31 can be communicated with an accelerated experiment working medium solvent storage tank outlet through an accelerated experiment working medium solvent conveying pipeline, and a pump 2 and a flow meter 4 are sequentially arranged on the accelerated experiment working medium solvent conveying pipeline from the inlet to the outlet. The accelerated test can effectively shorten the test period of the erosion abrasion of the nanometer fluid based on the same abrasion mechanism. Selecting a target material after the nano fluid erodes a specific time course, flushing, extracting and drying the target material, measuring and recording the surface three-dimensional morphology characteristics and the erosive wear amount, and selecting the effect required to be achieved by the accelerated experiment. And then, performing an accelerated test, and determining the accelerated efficiency of the accelerated test according to the comparison between the erosion face characteristic and the erosion abrasion amount of the target material, so as to determine the proper accelerated test performing time. The working medium concentration control valve 7 regulates the mass of accelerated experiment working medium particles which enter the accelerated experiment working medium mixing cavity 5 in unit time to complete full mixing according to the water flow speed measured by the flowmeter 4, thereby realizing the configuration of the concentration working medium. The experiment period required for the nano fluid to erode the target material 14 to achieve an obvious abrasion effect is long, and the experiment efficiency can be improved by arranging an accelerated experiment device and adopting a particle solution with large mass, hardness, size and concentration to replace the nano fluid to accelerate the erosion abrasion.
Referring to fig. 1, 6, 7 and 8, the trash recycling device includes: the device comprises a cylinder body 9, a nanofluid heat exchange tube 18, a cooling liquid pipeline 19, a water storage tank 26 and a nanofluid liquid storage tank 27; the outlet end of the straight pipe section 8 extends into the cylinder 9; a target 14 to be tested can be placed in the cylinder 9; the cylinder body 9 is provided with a nano fluid discharge port and an accelerated experiment working medium discharge port; a nanofluid outlet of the cylinder 9 is communicated with an inlet of a nanofluid liquid storage tank 27 through a nanofluid heat exchange tube 18 and a nanofluid working medium liquid discharge tube 22, the nanofluid working medium liquid discharge tube 22 extends into the nanofluid liquid storage tank 27, and an outlet of the nanofluid working medium liquid discharge tube 22 is a bell mouth and is provided with a porous spray head; the outlet of the nanometer fluid storage tank 27 is communicated with the inlet end of the nanometer fluid conveying pipeline; a nanofluid working medium filter screen 24 is obliquely arranged between the outlet of the nanofluid storage tank 27 and the outlet of the nanofluid working medium liquid discharge pipe 22; the nanofluid heat exchange tube 18 is arranged in the cooling liquid pipeline 19; an accelerated test working medium discharge port of the cylinder body 9 is communicated with an inlet of a water storage tank 26 through an accelerated test working medium discharge pipe 21, and an outlet of the accelerated test working medium discharge pipe 21 is a bell mouth and is provided with a porous spray head; the outlet of the water storage tank 26 is communicated with the inlet of the accelerated experiment working medium solvent conveying pipeline; an accelerated experiment working medium filter screen 23 is obliquely arranged between the outlet of the water storage tank 26 and the outlet of the accelerated experiment working medium liquid discharge pipe 21, and a pump protection filter screen 25 is also arranged between the accelerated experiment working medium filter screen 23 and the outlet of the water storage tank 26. The specific scheme is as follows: the cylinder body 9 is a transparent cylinder body; the export of nanometer fluid working medium fluid-discharge tube 22 and the export of expediting experiment working medium fluid-discharge tube 21 are the horn mouth, porous shower nozzle is installed to the horn mouth, and stretch into nanometer fluid liquid storage pot 27 and water storage tank 26 respectively, be provided with filter equipment respectively at nanometer fluid liquid storage pot 27 and water storage tank 26, filter equipment sets up respectively between the entry and the export of nanometer fluid liquid storage pot 27 and between the entry and the export of water storage tank 26, filter equipment includes the filter screen, the equal slope of filter screen sets up, be provided with impurity collection recess in the lower of filter screen. The inclined bottom surface filter screen is favorable for gathering solid particle impurities in a small groove at a lower position, so that the solid particle impurities can be conveniently and timely cleaned and recovered. In addition, the bell mouth drain pipe and the porous nozzle are selected to effectively reduce the flow speed and avoid the damage of the filter screen caused by the over concentration of the discharged liquid, and the filter screen can be protected to a certain extent while the impurity removal function is realized. A working medium recovery selector 17 is further arranged in the cylinder body 9, the structure is formed by superposing two same and coaxial porous plates, and the corresponding positions of the porous structures between the upper plate and the lower plate are adjusted by rotating the lower plate, so that different working media enter corresponding impurity removal devices. In particular, the cylinder 9 can be communicated with the water storage tank 26 or the nano-fluid storage tank 27 by rotating the lower plate. By arranging the impurity removal circulating device, the cyclic utilization of the working medium can be realized, and the influence on the surrounding environment can be avoided; in addition, through setting up edulcoration circulating device, can make simulation experiment device form closed loop, be convenient for use in the laboratory.
The nanofluid heat exchange tube 18 is of a spiral structure, the cooling liquid pipeline 19 is provided with an inlet and an outlet, and the inlet is arranged below the outlet; the nanofluid working medium to be recovered in the nanofluid heat exchange tube 18 and the cooling liquid in the cooling liquid pipeline 19 form a reverse flow to enhance heat exchange, and the nanofluid heat exchange tube 18 adopts a spiral tube to increase the heat exchange area and is not easy to be blocked by impurities. The nanofluid heat exchange tubes 18 and the coolant pipes 19 are miniaturized in combination, and can be used in parallel, so that the control sensitivity is improved, and two groups of the nanofluid heat exchange tubes and the coolant pipes are shown in fig. 1. In addition, the temperature controller 20 is connected with the conveying device of the cooling liquid pipeline 19, and the maintenance of the constant nano fluid working medium inlet temperature is realized by adjusting the flow speed of the cooling liquid and the additional heat compensation amount.
According to the simulation experiment device, the speed of the jet flow speed adjusting device of the nozzle is adjusted by the aid of the motor control cabinet 1 through the pump 2, and the flow speed fine adjusting valve 3 and the flow meter 4 are installed on a nano fluid conveying pipeline in front of the nozzle 12 to perform accurate fine adjustment and measurement calibration on the jet flow speed of the nozzle. In order to facilitate the observation and the recording of the flow structure in the jet impact experiment process, the experiment is carried out in a transparent cylinder body. The cylinder 9 is internally provided with a distance regulator 10 between a nozzle 12 and a target, a nozzle converter 11, the nozzle 12, an intermittent jet flow controller 13, a target 14, a jet flow impact angle regulator 15 and a target electric heater 16 with adjustable power. The nano fluid jet impact process adopts PIV and a high-speed camera to directly measure the flow field structure, a thermocouple arranged in the target material 14 is used for measuring the temperature of the target surface, and the jet impact heat exchange performance under different working conditions such as corresponding nozzle jet speed, distance between the nozzle and the target material, jet impact angle and the like is calculated by combining the measurement of heat provided by the target material electric heater 16 and the theoretical knowledge of the heat exchange of the target material 14. According to the observation of the erosion condition of the target 14 in the transparent cylinder 9, the target surface is extracted according to different specific time courses and is cleaned and dried, and the erosion abrasion results of the target 14 under different working conditions are obtained through the detection of the three-dimensional topography characteristics of the target surface and the accurate measurement of the weight loss of the target. In addition, in order to ensure the accuracy of the research results of the flowing heat exchange characteristics and the erosion wear performance, the nanofluid working medium after the impact experiment enters a temperature control device consisting of a nanofluid heat exchange tube 18, a cooling liquid tube 19 and a temperature controller 20 and an impurity removal device consisting of a bell mouth liquid discharge tube suitable for nanofluid and a filter screen before being recycled so as to ensure constant inlet temperature and impurity removal purification. Considering that the experiment period for the nano fluid to erode the target material 14 to achieve obvious abrasion effect is long, particle solution with larger mass, hardness, size and concentration is adopted to replace the nano fluid to accelerate the erosion abrasion. The accelerated experiment device also realizes jet impact at different speeds by the pump 2 by means of the motor control cabinet 1, and measures and calibrates the jet speed of the corresponding nozzle by the flowmeter 4. In order to avoid abrasion of the accelerated experiment working medium to the pump, the accelerated experiment working medium is configured with working media with different concentrations in the working medium mixing cavity 5, and the accelerated experiment working medium is filtered by impurity removal devices comprising corresponding drain pipes and filter screens after the erosion process is finished, and a pump protection filter screen 25 is additionally arranged at the inlet of the pump. The working media used by the accelerated experiment device and the nano fluid erosion experiment device are different, so that the nozzle converter 11 is adopted to flexibly switch and use the corresponding nozzles of different experiment devices, and the working medium recovery selector 17 is utilized to enable different working media to be efficiently recycled through the corresponding impurity removal device. Before the experiment, water and solid particles for configuring the accelerated experiment working medium are respectively stored in the water storage tank 26 and the accelerated experiment particle storage tank, and the nanofluid is positioned in the nanofluid storage tank 27. The water storage tank 26, the nano-fluid storage tank 27, the impurity removing device and the pump 2, the motor control cabinet 1 and the like are arranged below the operation table 28 for the sake of beauty and convenience of operation observation and data recording, and the rest devices are arranged above the operation table 28.
Referring to fig. 1 to 8, the experimental device for testing the flow heat exchange characteristic and the erosion wear performance of the nano fluid impact jet comprises a motor control cabinet 1, a pump 2, a flow rate fine adjustment valve 3 and a flow meter 4, which form a nozzle jet speed precise adjusting device. Wherein, pump 2 provides power for the experiment, realizes the regulation to the efflux speed with the help of motor control cabinet 1, carries out accurate fine setting by velocity of flow fine setting governing valve 3 again to measure the calibration through flowmeter 4. The nano fluid jet impact experiment is carried out in the transparent cylinder 9, wherein the nozzle 12, the nozzle converter 11 and the straight pipe section 8 are connected through a threaded structure, and replacement, cleaning and maintenance are convenient. The distance regulator 10 between the nozzle and the target in the cylinder 9, the intermittent jet flow controller 13 and the jet flow impact angle regulator 15 are respectively used for regulating and controlling different working conditions. In addition, in order to realize the experimental measurement under different heat conditions, a target electric heater 16 with adjustable power is arranged below the target 14, and a thermocouple is arranged in the target to measure the temperature of the target surface. Working media in the experiment process of impacting the target surface by the nano fluid jet flow are recycled after temperature regulation and recovery and impurity removal. The nanofluid heat exchange tube 18 and the cooling liquid pipeline 19 are realized by adjusting the flow speed of the cooling liquid and compensating the extra heat through the temperature controller 20, and the inlet temperature is constant when the nanofluid working medium is recycled. The impurity removal is realized by using a nano fluid working medium filter screen 24 which allows nano-grade particles to pass through but can block solid impurity particles with larger sizes, and a bell mouth liquid discharge pipe and a porous spray head in the impurity removal device are selected to effectively reduce the flowing speed of the working medium and avoid the damage of the filter screen caused by the over-concentration of the discharged working medium. The nanofluid after temperature regulation and impurity removal enters the nanofluid liquid storage tank 27 to be mixed with the original nanofluid working medium for standby. Because the experiment period required for achieving the obvious abrasion effect when the nano fluid erodes the target material is long, the particle solution with larger mass, hardness, size and concentration is necessary to replace the nano fluid to accelerate the erosion abrasion. In order to avoid abrasion of the accelerated experiment working medium to the pump, the accelerated experiment working medium is configured with working media with different concentrations in the working medium mixing cavity, the working medium is subjected to filtering of working medium particles through an impurity removal device comprising a corresponding liquid discharge pipe and a filter screen after the erosion experiment is completed, and a pump protection filter screen 25 is additionally arranged at the inlet of the pump. The working media used by the accelerated experiment device and the nano fluid erosion experiment device are different, so that the nozzle converter 11 is adopted to flexibly switch and use the corresponding nozzles of different experiment devices, and the working medium recovery selector 17 is utilized to enable different working media to be efficiently recycled through the corresponding impurity removal device. Before the experiment, water and solid particles for configuring the accelerated experiment working medium are respectively stored in the water storage tank 26 and the accelerated experiment particle storage tank. The water storage tank 26, the nano-fluid storage tank 27, the impurity removing device and the pump 2, the motor control cabinet 1 and the like are arranged below the operation table 28 for the sake of beauty and convenience of operation observation and data recording, and the rest devices are arranged above the operation table 28. The distance regulator 10 between the nozzle and the target, which is marked with scales in the distance regulating device between the nozzle and the target, and the straight pipe section 8 are meshed through gears to realize the accurate and stable regulation of the distance between the nozzle and the target. The accelerating experiment working medium mixing cavity is beneficial to accelerating the full mixing of the experiment working medium. The nozzle converter combines three different nozzles together, can switch in a flexible way each other, has avoided loaded down with trivial details dismantlement installation, guarantees that the experiment goes on high-efficient stable. The inclined bottom surface filter screen is adopted in the impurity removing device, so that solid particle impurities can be gathered in a small groove at a lower position, and the impurity removing device is convenient to clean and recycle in time. In addition, the nozzle converter and the porous spray head in the impurity removing device are respectively selected to clean the target surface in a large range, eliminate the erosion effect of cleaning liquid jet flow, effectively reduce the flow speed in the liquid discharge pipe and avoid the damage of the filter screen caused by the over concentration of discharged liquid. The working medium selection recoverer is formed by superposing two same and coaxial porous plates, and different working media enter corresponding devices by rotating the lower plate to adjust the corresponding positions of the porous structures between the upper plate and the lower plate. The nanofluid temperature control device forms countercurrent with the cooling liquid in the cooling liquid pipeline through the nanofluid working medium that needs to retrieve in the nanofluid heat exchange pipe to strengthen the heat transfer, and the nanofluid heat exchange pipe adopts spiral pipe to increase its heat transfer area and is difficult for receiving impurity jam moreover. The combination is miniaturized, and a plurality of the combination are used in parallel, so that the control sensitivity is improved.
The embodiment of the invention can be used for experimental exploration on the impact flow heat exchange characteristic and the erosion wear performance of the nano fluid working medium jet; and the device is suitable for recycling various nano fluid working media and working media, can replace nozzles with different sizes, selects different jet velocities and jet impact angles, and has a very comprehensive working condition adjusting range. The embodiment can also replace different types of targets, and can effectively reduce the experiment time required by the erosion of the targets through accelerated experiments. Through the comparative analysis of different types of target materials, nano fluid working media and jet impact experimental results under different working conditions, the selection of the remarkably strengthened heat exchange working condition can be realized, and a reliable basis is provided for the service life evaluation of materials used in engineering under the condition.
The invention relates to an experimental method for researching the flow heat exchange characteristics and the erosion wear performance of a nanometer fluid impact jet, which is based on the simulation experimental device, a nozzle with preset specifications is selected, a preset type of nanometer fluid is selected, the heat flux density of a target material is determined through a heating device, the temperature of the nanometer fluid at the outlet of the nozzle in the experiment and the temperature of the target material after jet injection are detected through a temperature detection device, and the heat exchange performance of the nanometer fluid during jet impact is reflected through the Nussel number; the Knoop number is a dimensionless temperature gradient of fluid working media on the wall surface, and the invention reflects the enhancement of the heat exchange performance when the nano fluid jet impacts by means of the dimensionless temperature gradient. The calculation formula of the Knudel number is as follows:
in the formula: q-target Heat flow Density (Unit: W.m)-2；
D is the characteristic dimension of the nozzle, which corresponds to the diameter of the circular nozzle (unit: m;
Twalltarget temperature after jet ejection (unit: K;
T∞jet nozzle outlet nanofluid working temperature (unit: K;
lambda-heat conductivity coefficient of nano fluid working medium (unit: W.m)-1·K-1。
The simulation experiment method is based on the simulation experiment device, and can represent the heat exchange performance of the nano fluid jet flow during impact through the Knoop number; after the nozzle and the nano fluid are selected, the size of the nozzle and the heat conductivity coefficient of the nano fluid can be determined; different heat flux densities of the target can be realized through the heating device, the heat flux densities are determined and serve as known conditions, the temperature of the nanofluid of the nozzle jet and the temperature of the surface of the target after jet injection can be detected through the temperature detection device, the Knudel number can be calculated through the determined parameters, and the flowing heat exchange performance of the nanofluid jet during impact can be researched through the change of the Knudel number. And detecting the erosion wear three-dimensional morphology of the target surface by using a surface finitometer and a scanning electron microscope, and measuring the maximum height and the average height of the erosion pits on the surface of the target material, the range of the erosion surface of the target surface and morphological characteristics. And accurately weighing the weight of the target material after cleaning and drying before and after the experiment by using an electronic balance, and then comparing to obtain the erosion abrasion loss. And analyzing the erosion wear performance of the target by the impact jet by means of the three-dimensional feature of the erosion surface of the target and the erosion wear amount.
In addition, for a target surface and nano fluid working medium types made of given materials, the nano fluid working medium jet erosion abrasion is mainly influenced by the concentration rho (unit: kg.m) of the nano fluid working medium-3And the impact velocity V (unit: m.s)-1Erosion Angle α (Unit: 1, and Effect of nanoparticle diameter D (Unit: m.) according to dimensional analysis, erosion wear Rate E (Unit: kg. m.) for a given target and Nanofluid type-2·s-1Can be expressed as:
wherein k is a constant, and k is a constant,
the specific expression form can be obtained by analyzing experimental working conditions.
The working principle of the invention is as follows:
the nano fluid jet flow simulation experiment device of the invention utilizes the pump to realize that the nano fluid working medium is ejected from the liquid storage tank by the nozzle at different speeds through the motor control cabinet connected with the pump, and the flowmeter is arranged in front of the nozzle to measure and test the speed of the jet flow. The nozzle, the impacted target material and the adjusting devices under various working conditions are jointly arranged in a transparent vertical cylinder body to perform an experiment of impacting the target surface by the nanometer fluid working medium jet. In the experimental process, the electric heater below the target provides heat required by the target, so that the target electric heater is insulated and insulated, and heat dissipation or electric leakage to the environment is avoided. From the computational expression of the knoop number it can be seen that the nanofluid jet impingement heat exchange performance for a given nozzle size is related to the difference between the target temperature and the nozzle exit jet temperature and the heat flux density of the target provided by the electric heater. The heat exchange performance of the nanometer fluid jet flow impacting the target surface can be calculated by combining the temperature measurement results of the thermocouple on the target surface and the jet flow at the outlet of the nozzle and the measurement of the power of the target electric heater. And the analysis of the reason for strengthening the heat exchange performance in the jet impact constant heat flow density target material is carried out according to the direct measurement of the flow field structure of the jet impact target surface by using the PIV and the high-speed camera. The nano fluid jet erosion wear performance is analyzed and researched according to the three-dimensional feature of the target surface and the erosion wear weight loss of the target material. The three-dimensional feature of the target surface is obtained by detecting the target material after cleaning and drying by adopting a surface finimeter and a scanning electron microscope, and the erosion wear loss of the target material comes from the accurate weighing comparison of the target material after cleaning and drying before and after the experiment by an electronic balance. In the embodiment of the invention, the influence of various factors such as the distance between different nozzles and the target material, the erosion angle, the pulsation form, different heat and the like on actual erosion abrasion is comprehensively considered, and the distance adjusting device between the nozzles and the target material realizes the accurate and stable adjustment of the distance between the nozzles and the target material through the gear engagement between the distance adjuster between the nozzles and the target material and the straight pipe section; the erosion angle adjusting and heating device realizes the adjustment of the jet impact angle by rotating a rotary shaft which is integrally marked with the target material and has a scale; the temperature control device forms countercurrent of the nanofluid and the cooling liquid through the spiral nanofluid heat exchange tube and the cooling liquid pipeline, and heat exchange is enhanced. In addition, the temperature rise of the lower-temperature nanofluid is realized through additional heat compensation. And in order to save cost, the nano fluid working medium in the experiment realizes cyclic utilization. Therefore, the nanometer fluid working medium after the target impact is finished must pass through an impurity removal device. Moreover, in order to improve the accuracy of the measurement and calculation of the heat exchange performance, the constant inlet temperature must be kept through a temperature control device before the nano fluid working medium is recycled. In addition, because the experiment period required for achieving the obvious abrasion effect when the nano fluid erodes the target material is long, the invention adopts the particle solution with larger mass, hardness, size and concentration to replace the nano fluid to accelerate the erosion abrasion based on the same abrasion mechanism. And (3) washing and extracting the target material subjected to erosion and wear in the accelerated test, measuring, comparing the target material with the required target material according to the erosion feature and the erosion and wear amount of the target material to determine the accelerated efficiency of the accelerated test, and further selecting the required accelerated test carrying time. The nozzle forms used by the experimental devices with different purposes are different, in order to avoid complicated disassembly and assembly to ensure high efficiency and stability of experiment, the nozzle converter is adopted to combine three different nozzles in the nano fluid jet erosion experimental device, the acceleration experimental device and the target surface cleaning device, and flexible and convenient switching among the three nozzles is realized. In addition, the nozzle is connected with the nozzle converter and the straight pipe section through a thread structure, so that replacement of nozzles with different sizes and cleaning and maintenance of the nozzle converter are facilitated. After the experiment is finished, the working medium recovery selector enables different working media to be efficiently recycled through the corresponding impurity removal device.
For review and analysis, the experimental device for researching the flow heat exchange characteristic and the erosion wear performance of the nanometer fluid impact jet flow simulates the nanometer fluid impact cooling process of various devices in practical engineering through a nanometer particle jet flow impact target material test piece; mainly comprises a nano fluid jet impact experimental device, an acceleration experimental device and a cleaning device of a target surface before result measurement; in the embodiment, the nano fluid jet impact experimental device considers the influences of various factors such as the distance between different nozzles and a target surface, the intermittent jet form, the jet impact angle, the heat quantity of different target surfaces and the like, can be specifically selected according to actual needs, and has a wider application range; the method mainly comprises the steps of calculating the heat exchange performance of the nanometer fluid jet impact target surface by combining the temperature measurement results of the nanometer fluid at the target surface and the nozzle inlet by a thermocouple with the power measurement of a target electric heater; analyzing the reason for strengthening the heat exchange performance in the process of impacting the constant heat flow density target surface by jet flow according to the direct measurement of the flow field structure under different working conditions by using the PIV and the high-speed camera; the erosion abrasion performance of the nano fluid jet can be analyzed and researched according to the three-dimensional feature of the target surface and the erosion abrasion weight loss of the target; the target surface three-dimensional appearance characteristics are obtained by detecting the cleaned and dried target material by adopting a surface finitometer and a scanning electron microscope, and the erosion wear loss of the target material is obtained by accurately weighing and comparing the cleaned and dried target material by an electronic balance before and after an experiment; the accelerated experiment adopts particle solution with larger mass, hardness, size and concentration to replace nano fluid for accelerated erosion and abrasion. The accelerated experiment method can effectively shorten the experiment time required by the nano fluid jet to erode the target material based on the same abrasion mechanism. The experimental working media are considered and recycled, and the cost is reduced.
Claims (1)
1. A nanofluid impact jet flow heat exchange characteristic and erosion wear performance experimental device is characterized by comprising: the device comprises a nano fluid conveying pipeline, a straight pipe section (8), a nozzle (12), a temperature detection device, a heating device, a cylinder body (9) and an impurity removal circulating device;
the inlet end of the nano fluid conveying pipeline can be communicated with a nano fluid storage tank (27), the outlet end of the nano fluid conveying pipeline is communicated with the inlet end of the straight pipe section (8), the outlet end of the straight pipe section (8) is provided with a nozzle (12), the nozzle (12) extends into the cylinder body (9), and the nozzle (12) is used for spraying nano fluid jet; the target (14) to be tested can be placed in the cylinder body (9), the outlet of the cylinder body (9) is connected with an impurity removal circulating device, and the impurity removal circulating device is used for removing eroded target solid particles carried in fluid to purify fluid working media;
a pump (2) and a flowmeter (4) are sequentially arranged on the nano fluid conveying pipeline from the inlet end to the outlet end, and the pump (2) is used for providing power for nano fluid;
the temperature detection device is used for detecting the temperature of a target (14) to be tested and the temperature of the nanofluid at the outlet of the nozzle (12); the heating device is used for placing the target (14) and heating the target (14);
also comprises an intermittent jet controller (13); the intermittent jet flow controller (13) is arranged between the nozzle (12) and a target material (14) to be tested; the discontinuous jet flow controller (13) comprises a blocking sheet which can block the nano fluid sprayed by the nozzle (12) at a preset frequency;
the device also comprises an acceleration experimental device; the accelerated experiment device comprises an accelerated experiment working medium mixing cavity (5) and an accelerated wear particle storage tank (6);
the accelerated experiment working medium mixing cavity (5) is provided with an accelerated experiment working medium outlet (29), an accelerated experiment solid working medium particle inlet (30) and an accelerated experiment working medium solvent inlet (31); the accelerated experiment working medium outlet (29) is communicated with the inlet end of the straight pipe section (8); the acceleration experiment solid working medium particle inlet (30) is communicated with an outlet of the acceleration experiment solid working medium particle storage tank (6) through an acceleration experiment solid working medium particle conveying pipeline, and a working medium concentration control valve (7) is arranged on the acceleration experiment solid working medium particle conveying pipeline; the accelerated experiment working medium solvent inlet (31) can be communicated with an outlet of an accelerated experiment working medium solvent storage tank through an accelerated experiment working medium solvent conveying pipeline, and a pump (2) and a flow meter (4) are sequentially arranged on the accelerated experiment working medium solvent conveying pipeline from the inlet to the outlet;
edulcoration circulating device includes: a nanofluid heat exchange tube (18), a cooling liquid pipeline (19), a water storage tank (26) and a nanofluid liquid storage tank (27);
the cylinder body (9) is provided with a nano fluid discharge port and an accelerated experiment working medium discharge port; a nanometer fluid discharge port of the cylinder body (9) is communicated with an inlet of a nanometer fluid storage tank (27) through a nanometer fluid heat exchange pipe (18), and an outlet of the nanometer fluid storage tank (27) is communicated with an inlet end of a nanometer fluid conveying pipeline; the nanofluid heat exchange tube (18) is arranged in the cooling liquid pipeline (19); an accelerated test working medium discharge port of the cylinder body (9) is communicated with an inlet of a water storage tank (26), and an outlet of the water storage tank (26) is communicated with an inlet of an accelerated test working medium solvent delivery pipeline;
a flow speed fine adjustment valve (3) is also arranged between the pump (2) and the flowmeter (4) of the nano fluid conveying pipeline;
further comprising a nozzle changer (11); a plurality of nozzles (12) are arranged on a nozzle converter (11), and the nozzle converter (11) is arranged at the outlet end of the straight pipe section (8);
also comprises a distance adjuster (10) between the nozzle and the target material; a distance regulator (10) between the nozzle and the target is arranged on the straight pipe section (8); the distance regulator (10) between the nozzle and the target comprises a gear and an operating rod; a rack is fixedly arranged on the outer wall of the straight pipe section (8), a gear is meshed with the rack and fixedly connected with an operating rod; the device also comprises an angle adjusting and heating device; the angle adjusting and heating device comprises an operating rod and a heating device; the heating device is fixedly connected with the operating rod and used for placing a target (14) to be tested and heating the placed target (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810844658.9A CN109406566B (en) | 2018-07-27 | 2018-07-27 | Nano fluid impact jet flow heat exchange characteristic and erosion wear performance experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810844658.9A CN109406566B (en) | 2018-07-27 | 2018-07-27 | Nano fluid impact jet flow heat exchange characteristic and erosion wear performance experimental device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109406566A CN109406566A (en) | 2019-03-01 |
| CN109406566B true CN109406566B (en) | 2021-02-09 |
Family
ID=65463476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810844658.9A Active CN109406566B (en) | 2018-07-27 | 2018-07-27 | Nano fluid impact jet flow heat exchange characteristic and erosion wear performance experimental device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109406566B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132779A (en) * | 2019-05-16 | 2019-08-16 | 中国十九冶集团有限公司 | For characterizing the three dimensional analysis method of concrete surface Scouring Characteristic |
| CN116314084B (en) * | 2023-05-24 | 2023-08-04 | 中国人民解放军国防科技大学 | Micro-particle flow heat exchange device based on jet flow exciter |
| CN116754607B (en) * | 2023-08-17 | 2023-10-27 | 北京科技大学 | Heat exchange and abrasion comprehensive test device and method for dispersion body and solid wall surface |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207366372U (en) * | 2017-11-16 | 2018-05-15 | 成都理工大学 | Multifunctional pipeline closed cycle sample erosive wear experimental apparatus for testing |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3448192B2 (en) * | 1997-08-25 | 2003-09-16 | 三菱重工業株式会社 | Measuring method of calorific value of soda recovery boiler fuel black liquor |
| CN101140209A (en) * | 2007-10-08 | 2008-03-12 | 西安理工大学 | Jet stream type erosion abrasion test device |
| US20110005193A1 (en) * | 2009-07-07 | 2011-01-13 | Thomas Clayton Pavia | Method and apparatus for simplified thrust chamber configurations |
| CN203191337U (en) * | 2013-04-12 | 2013-09-11 | 温州大学 | Experiment table for determining heat transfer coefficient of single jet hole |
| CN104266923A (en) * | 2014-09-16 | 2015-01-07 | 中国科学院力学研究所 | Gas jet-type erosive-wear testing machine |
| CN104568631A (en) * | 2015-01-21 | 2015-04-29 | 浙江理工大学 | Gas-solid two-phase erosion wear testing device |
| CN105588700B (en) * | 2015-12-16 | 2018-04-17 | 西安交通大学 | A kind of evaluating apparatus and method of rotary impact jet stream Complex Flow Status and heat transfer effect |
| CN105628531B (en) * | 2015-12-30 | 2018-07-31 | 浙江理工大学 | Continuous high-temperature high speed Dual-Phrase Distribution of Gas olid erosion abrasion test device |
| CN107473598B (en) * | 2017-09-15 | 2020-07-24 | 成都精密光学工程研究中心 | Acid jet etching method and acid jet etching device for fused quartz optical element |
-
2018
- 2018-07-27 CN CN201810844658.9A patent/CN109406566B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207366372U (en) * | 2017-11-16 | 2018-05-15 | 成都理工大学 | Multifunctional pipeline closed cycle sample erosive wear experimental apparatus for testing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109406566A (en) | 2019-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109406566B (en) | Nano fluid impact jet flow heat exchange characteristic and erosion wear performance experimental device | |
| CN105628531B (en) | Continuous high-temperature high speed Dual-Phrase Distribution of Gas olid erosion abrasion test device | |
| Zu et al. | Design of a slurry erosion test rig | |
| CN108507893B (en) | Erosion device and sample erosion wear rate measuring apparatus | |
| CN101975744A (en) | Erosion corrosion test device of seawater piping system metal member | |
| CN101140209A (en) | Jet stream type erosion abrasion test device | |
| CN108181193B (en) | Jet type erosion corrosion test device | |
| CN106885749B (en) | Tank type erosion wear test device and method | |
| CN101477011A (en) | High-temperature erosion abrasion test device and method | |
| CN102841027A (en) | Test device and test method for measuring erosion and abrasion resistance of hydraulic concrete | |
| Khan et al. | A Multi‐Block Approach to Obtain Angle‐Resolved PIV Measurements of the Mean Flow and Turbulence Fields in a Stirred Vessel | |
| CN202238756U (en) | Wet-process cleaning equipment | |
| CN207923594U (en) | Erosion device and sample erosive wear speed measurement equipment | |
| Chailad et al. | Development of slurry-jet erosion test for elastomeric materials | |
| CN1804943A (en) | Self-circulation electrical momentum law experimental instrument | |
| CN107255499B (en) | Evaporation capacity measuring device and method for multi-effect evaporation system | |
| CN105675427A (en) | Slag slurry erosion wear testing machine for rubber material | |
| CN107764722A (en) | Current stabilization and the rotation erosion corrosion test device of temperature control can be achieved | |
| CN205280529U (en) | High -speed thick liquid flows erosion and corrosion test device | |
| CN112414878A (en) | Solid-liquid two-phase flow pipe erosion wear test device | |
| CN110926987A (en) | High-precision test bed for analyzing erosion wear of surface sample | |
| CN114577650A (en) | Multi-parameter adjustable gas-liquid-solid erosive wear experiment device combining jet flow and pipe flow and using method thereof | |
| CN106053273A (en) | A rotary liquid impact erosion test device | |
| CN201945545U (en) | Erosion corrosion test device for metal components in sea water piping system | |
| CN2870038Y (en) | Self-circulation electric measuring momentum theorem experiment instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |