CN112362298A - Gas phase flow field simulation device with variable boundary conditions - Google Patents
Gas phase flow field simulation device with variable boundary conditions Download PDFInfo
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- CN112362298A CN112362298A CN202011200468.7A CN202011200468A CN112362298A CN 112362298 A CN112362298 A CN 112362298A CN 202011200468 A CN202011200468 A CN 202011200468A CN 112362298 A CN112362298 A CN 112362298A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/08—Aerodynamic models
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention provides a gas phase flow field simulation device with variable boundary conditions, which comprises: the device comprises an artificial crack body channel main body, an air power mechanism and a measuring mechanism which are connected through a pipeline, wherein the air power mechanism is used for providing flowing compressed air for a channel of the artificial crack body channel main body, and the measuring mechanism is used for measuring various measurement data of the artificial crack body channel main body; the measurement data includes: temperature, pressure, flow, humidity; wherein: and the artificial fissure body channel main body is internally provided with a bonding material, and the bonding material is used for forming different boundary conditions. The device provided by the invention has the advantages of simple structure, easiness in operation and variable flow field boundary conditions, can simulate uniform flow of the channel and observe fluid state change of fluid, and can carry out a gas phase dynamic performance test of a scale ratio model in the channel.
Description
Technical Field
The invention relates to the technical field of fluid mechanics, in particular to a gas phase flow field simulation device with variable boundary conditions.
Background
At present, flow field simulation is mainly realized by a wind tunnel laboratory, a water tunnel laboratory or a water tank test device and the like. The flow field simulation experiment is a common experiment method for effectively researching the fluid migration rule in a fracture field, and the method can intuitively simulate the fluid flowing process under the underground invisible environment condition.
Most of the existing material simulation experiments are precise and expensive experimental equipment, and most of the materials are mainly actual rock masses. The simulation device is difficult to control the roughness of the surface of the fracture test piece, so that visual simulation is difficult to realize, and the fracture field test piece with a variable boundary is difficult to manufacture. Therefore, it is necessary to develop a simulation apparatus capable of filling the defect to achieve a better reduction of the actual flow process.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a gas phase flow field simulation device with variable boundary conditions.
According to the present invention, there is provided a gas phase flow field simulation apparatus having a variable boundary condition, comprising: the device comprises an artificial crack body channel main body, an air power mechanism and a measuring mechanism which are connected through a pipeline, wherein the air power mechanism is used for providing flowing compressed air for a channel of the artificial crack body channel main body, and the measuring mechanism is used for measuring various measurement data of the artificial crack body channel main body; the measurement data includes: temperature, pressure, flow, humidity; wherein: and the artificial fissure body channel main body is internally provided with a bonding material, and the bonding material is used for forming different boundary conditions.
Optionally, the artificial cleft body channel main body is formed by injection molding of a transparent acrylic plate material, the cross section of the artificial cleft body channel main body is of a rectangular structure, and the inner wall of the channel of the artificial cleft body channel main body is bonded with bonding materials of different shapes.
Optionally, the air inlet of the artificial cleft body channel main body is connected with an gradually expanding pipe filled with a porous medium, and a metal mesh baffle is arranged at the connection position of the gradually expanding pipe and the artificial cleft body channel main body.
Optionally, the air inlet of the artificial cleft body channel main body is connected with one end of a reducer, and the other end of the reducer is communicated with the atmosphere environment through a pipeline.
Optionally, the aerodynamic mechanism comprises: compressed air gas cylinder, manual switch valve, relief pressure valve and manometer, wherein:
the compressed air cylinder is used for providing compressed air;
the manual switch valve is used for opening or closing the pipeline channel;
the pressure reducing valve is used for adjusting the gas pressure in the pipeline;
the pressure gauge is used for measuring the gas pressure in the pipeline.
Optionally, the measuring mechanism comprises: temperature and humidity measuring meter, differential pressure meter and flowmeter arranged on the artificial crack body channel main body, wherein:
the temperature and humidity measuring meter is used for measuring the temperature and the humidity of the artificial fissure body channel main body;
the differential pressure gauge is used for measuring the pressure difference between the artificial fissure body channel main body and the external environment;
the flow meter is respectively used for measuring the flow of the air inlet and the air outlet of the artificial fissure body channel main body.
Optionally, the method further comprises: an experiment platform support on which the artificial fissure body channel body is fixed.
Optionally, the method further comprises: and the high-speed camera equipment is in communication connection with an upper computer and is used for sending the shot flow field image of the artificial fissure body channel main body to the upper computer.
Compared with the prior art, the invention has the following beneficial effects:
the gas phase flow field simulation device with the variable boundary conditions has the advantages of simple structure, simplicity and easiness in operation, variable flow field boundaries and easiness in obtaining parameters, can simulate uniform flow of a channel and observe fluid state transition of fluid, and can perform a gas phase dynamic performance test of a scale ratio model in the channel.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic structural diagram of a gas-phase flow field simulation apparatus with variable boundary conditions according to an embodiment of the present invention.
In the figure:
1-compressed air bottle; 2-a first pressure gauge; 3-manual switch valve; 4-a pressure reducing valve; 5-a second pressure gauge; 6-a first flow meter; 7-a divergent tube; 8-cotton; 9-metal mesh baffle; 10-a temperature and humidity measuring meter; 11-an artificial fissure body channel body; 12-acrylic sheet; 13-a binding material; 14-a differential pressure gauge; 15-a reducer; 16-a second flow meter; 17-experiment platform support; 18-a high-speed camera device; 19-pipeline.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
The invention provides a gas phase flow field simulation device with variable boundary conditions, which comprises: the device comprises an artificial crack body channel main body, an air power mechanism and a measuring mechanism which are connected through a pipeline, wherein the air power mechanism is used for providing flowing compressed air for a channel of the artificial crack body channel main body, and the measuring mechanism is used for measuring various measurement data of the artificial crack body channel main body; the measurement data includes: temperature, pressure, flow, humidity; wherein: the artificial fissure body channel main body is internally provided with bonding materials which are used for forming different boundary conditions.
Illustratively, the artificial cleft body channel body is formed by injection molding of a transparent acrylic plate material, the cross section of the artificial cleft body channel body is of a rectangular structure, and the inner wall of the channel of the artificial cleft body channel body is bonded with bonding materials of different shapes.
In the present embodiment, the adhesive material is adhered to the inside of the artificial cleavage body, for example, to the upper and lower surfaces of the inner wall by adhesion, and then the shape of the adhesive material and the amount of adhesion are adjusted to exhibit the variable boundary condition.
Illustratively, the air inlet of the artificial cleft body channel main body is connected with an expanding pipe filled with porous media, and a metal mesh baffle is arranged at the joint of the expanding pipe and the artificial cleft body channel main body.
In this embodiment, porous media such as cotton or sponge can be filled in the divergent pipe, and the arrangement of the metal mesh baffle can effectively prevent the porous media inside the divergent pipe from entering the artificial fissure body channel main body.
Illustratively, the air inlet of the artificial cleft body passage main body is connected with a reducing pipe, and the other end of the reducing pipe is communicated with the atmosphere environment through a pipeline.
In this embodiment, the reducer can avoid local resistance generated when air flows out, and the end of the reducer is connected to the pipeline to the atmosphere.
Illustratively, the aerodynamic mechanism includes: compressed air gas cylinder, manual switch valve, relief pressure valve and manometer, wherein: the compressed air cylinder is used for providing compressed air; the manual switch valve is used for opening or closing the pipeline channel; the pressure reducing valve is used for adjusting the gas pressure in the pipeline; the pressure gauge is used for measuring the gas pressure in the pipeline.
Illustratively, the measurement mechanism includes: temperature and humidity measuring meter, differential pressure meter, flowmeter of setting on artifical crack body passageway main part, wherein: the temperature and humidity measuring meter is used for measuring the temperature and the humidity of the artificial fissure body channel main body; the differential pressure gauge is used for measuring the pressure difference between the artificial fissure body channel main body and the external environment; the flow meters are respectively used for measuring the flow of the air inlet and the air outlet of the artificial fissure body channel main body.
Illustratively, the artificial cleft body channel body is fixed to the test platform support.
Exemplarily, a high-speed camera device is further arranged and is in communication connection with an upper computer, and the high-speed camera device is used for sending the shot flow field image of the artificial fissure body channel main body to the upper computer.
Fig. 1 is a schematic structural diagram of a gas-phase flow field simulation apparatus with variable boundary conditions according to an embodiment of the present invention, as shown in fig. 1, the apparatus in this embodiment may include: the device comprises a compressed air bottle 1, a first pressure gauge 2, a manual switch valve 3, a pressure reducing valve 4, a second pressure gauge 5, a first flow meter 6, a gradually expanding pipe 7, cotton 8, a metal mesh baffle plate 9, a temperature and humidity measuring meter 10, an artificial crack body channel main body 11, an acrylic plate 12, a bonding material 13, a differential pressure meter 14, a reducing pipe 15, a second flow meter 16, an experiment platform support 17, high-speed camera equipment 18 and a pipeline 19. The compressed air bottle 1 is connected with one end of the gradually expanding pipe 7 through a pipeline, and a first pressure gauge 2, a manual switch valve 3, a pressure reducing valve 4, a second pressure gauge 5 and a first flow meter 6 are arranged on the pipeline between the compressed air bottle 1 and the gradually expanding pipe 7.
In this embodiment, if the humiture of air has great influence to the experimental result in compressed air gas cylinder 1, can observe through humiture measurement table 10 to by the record analysis of experimenter, with further research.
The device in this embodiment adopts compressed air to replace gas, and is safe and environmental protection. The cotton and the metal net baffle are arranged at the inlet of the artificial crack body, so that air flow can uniformly enter the artificial crack body, and the metal net baffle can prevent the cotton from being brought into the artificial crack body by the air flow.
Illustratively, the artificial fissure channel body 11 is constructed by injection molding of an acrylic plate 12 material, and the interior of the channel is bonded by a bonding material 13 to form different boundary conditions.
In this embodiment, the adhesive material 12 is adhered to both the upper and lower surfaces inside the artificial cleavage body passage main body 11 by means of adhesion, and the variable boundary condition is expressed by adjusting the shape of the adhesive material 12 and the amount of adhesion. So that diverse and variable boundary conditions can be bonded using the bonding material 13.
In this embodiment, the adhesive material 12 may be manufactured by a 3D printing technique, and the specific method is to obtain relevant data of a fracture surface through a single-axis tension, compression, and shear experiment on a rock body in an earlier stage, and print the relevant data to prepare the adhesive material 12.
According to the device in the embodiment, the bonding material prepared by the 3D printing technology can well simulate the internal condition after the formation of the rock body cracks after overburden rock mining under the actual condition, and the variable boundary conditions can be realized.
Illustratively, the air inlet of the artificial cleft body passage main body 11 is connected by the divergent pipe 7, a metal mesh baffle 9 is attached to the joint of the artificial cleft body passage main body 11 and the divergent pipe 7, cotton 8 is filled in the divergent pipe 7, and the metal mesh baffle 9 is used for blocking the cotton 8 from entering the artificial cleft body passage main body 11.
In this embodiment, the channel body has a rectangular cross section and is made of a high-transmittance acrylic plate 12. Neither the reducer 7 nor the reducer 15 at the inlet and outlet ends of the artificial cleft body passage body 11 will produce a large local resistance. The cotton 8 or sponge and other porous media in the gradually expanding pipe at the inlet of the artificial cleft body passage main body can uniformly convey the front-section compressed air into the artificial cleft body passage main body 11.
As shown in figure 1, the air outlet of the artificial cleft body channel main body 11 is connected by an expanding pipe 7, so that local resistance is avoided when air flows out, and the tail end of the expanding pipe 15 is connected with a pipeline 19 to the atmospheric environment.
As shown in fig. 1, the temperature and humidity measuring meter 10, the differential pressure meter 14, the first flow meter 6 and the second flow meter 16 are arranged on the artificial crack body channel main body 11, and the probe of each measuring meter enters the channel through a small hole reserved on the artificial crack body channel main body 11.
As shown in fig. 1, the inlet and outlet pipe sections of the artificial fracture body channel body 11 are respectively provided with a first flowmeter 6 and a second flowmeter 16 for recording related data and measuring the air tightness of the artificial fracture body channel body 11.
As shown in fig. 1, the artificial fissure channel body 11 is firmly built on the experimental platform support 17.
As shown in fig. 1, the apparatus further comprises a high-speed camera 18 connected to an upper computer for photographing the flow field of the artificial fissure body channel body 11.
In the embodiment, the flowing condition under different temperature and humidity conditions can be analyzed by recording the reading of the temperature and humidity measuring meter. And the high-speed camera equipment is convenient for observing the related information of the flow state of the laminar flow and the turbulent flow in the flow field in the later period. The air tightness problem in the construction process of the artificial crack body can be detected by recording the readings of the front flowmeter and the rear flowmeter of the artificial crack body. The artificial cleft body channel main body adopts a detachable and separable design so as to facilitate the detachment of the cover plate and the adhesive material.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (8)
1. A gas phase flow field simulator with variable boundary conditions, comprising: the device comprises an artificial crack body channel main body, an air power mechanism and a measuring mechanism which are connected through a pipeline, wherein the air power mechanism is used for providing flowing compressed air for a channel of the artificial crack body channel main body, and the measuring mechanism is used for measuring various measurement data of the artificial crack body channel main body; the measurement data includes: temperature, pressure, flow, humidity; wherein: and the artificial fissure body channel main body is internally provided with a bonding material, and the bonding material is used for forming different boundary conditions.
2. The gas-phase flow field simulator with variable boundary conditions according to claim 1, wherein the artificial cleft body channel main body is formed by injection molding of a transparent acrylic plate material, the cross section of the artificial cleft body channel main body has a rectangular structure, and the inner wall of the channel of the artificial cleft body channel main body is bonded with bonding materials of different shapes.
3. The gas-phase flow field simulator with variable boundary conditions according to claim 1, wherein the inlet of the artificial cleft body channel main body is connected to an expanding pipe filled with a porous medium, and a metal mesh baffle is disposed at a connection of the expanding pipe and the artificial cleft body channel main body.
4. The gas-phase flow field simulator with variable boundary conditions of claim 1, wherein the inlet of the artificial cleft body channel main body is connected to one end of a reducer, and the other end of the reducer is connected to the atmosphere through a pipeline.
5. The gas phase flow field simulation device with variable boundary conditions of any one of claims 1 to 4, wherein the aerodynamic mechanism comprises: compressed air gas cylinder, manual switch valve, relief pressure valve and manometer, wherein:
the compressed air cylinder is used for providing compressed air;
the manual switch valve is used for opening or closing the pipeline channel;
the pressure reducing valve is used for adjusting the gas pressure in the pipeline;
the pressure gauge is used for measuring the gas pressure in the pipeline.
6. The gas-phase flow field simulation device with variable boundary conditions according to any one of claims 1 to 4, wherein the measurement mechanism includes: temperature and humidity measuring meter, differential pressure meter and flowmeter arranged on the artificial crack body channel main body, wherein:
the temperature and humidity measuring meter is used for measuring the temperature and the humidity of the artificial fissure body channel main body;
the differential pressure gauge is used for measuring the pressure difference between the artificial fissure body channel main body and the external environment;
the flow meter is respectively used for measuring the flow of the air inlet and the air outlet of the artificial fissure body channel main body.
7. The gas phase flow field simulation device with variable boundary conditions of any one of claims 1 to 4, further comprising: an experiment platform support on which the artificial fissure body channel body is fixed.
8. The gas phase flow field simulation device with variable boundary conditions of any one of claims 1 to 4, further comprising: and the high-speed camera equipment is in communication connection with an upper computer and is used for sending the shot flow field image of the artificial fissure body channel main body to the upper computer.
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