CN112083039A - Material ignition point test assessment device and method - Google Patents
Material ignition point test assessment device and method Download PDFInfo
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- CN112083039A CN112083039A CN202011051851.0A CN202011051851A CN112083039A CN 112083039 A CN112083039 A CN 112083039A CN 202011051851 A CN202011051851 A CN 202011051851A CN 112083039 A CN112083039 A CN 112083039A
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- 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
- G01N25/50—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
Abstract
The invention provides a material ignition point test examination device and an examination method, and solves the problems that the temperature performance data of the existing material is limited, and the ignition point of the material is difficult to verify due to the fact that the existing metal ignition test cannot provide high-temperature high-pressure oxygen-enriched conditions. A material ignition point test and assessment device comprises a fuel gas generator, a water cooling section, a test piece clamping section, a monitoring section and a process spray pipe which are sequentially communicated; the fuel gas generator is used for providing high-temperature and high-pressure oxygen-enriched fuel gas for the test piece to be tested; the water cooling section is more than or equal to 600mm and is used for improving the uniformity of fuel gas; the water cooling section and the monitoring section are both provided with a temperature sensor and a pressure sensor which are used for monitoring the temperature, the pressure and the pressure fluctuation condition of the front and the back of the test piece of the nuclear to be tested; the process spray pipe is used for controlling the incoming flow pressure of the oxygen-enriched fuel gas; the water cooling section, the test piece clamping section, the monitoring section and the process spray pipe are all made of high-temperature alloy materials.
Description
Technical Field
The invention belongs to a material performance test and assessment device, and particularly relates to a material ignition point test and assessment device and an assessment method.
Background
In the liquid rocket engine, certain components (such as various components of a gas path structure: a gas pipeline, a turbine stator, a rotor and the like) work in a high-temperature environment, and as the performance requirements of the engine (such as a high-performance liquid oxygen kerosene afterburning cycle engine) are improved, the working environment of the engine components is also more severe, and the working temperature faces new challenges.
In order to adapt to a more severe working environment, the performance of the engine needs to be improved on the basis that researchers master the performance of materials used by each component in a high-temperature environment, but the temperature performance data of the current materials cannot provide strong data support for the research of a novel engine, and the ignition point of the materials cannot be verified due to the fact that the existing metal ignition test cannot provide high-temperature high-pressure oxygen-enriched conditions. Therefore, a new material ignition point test and check device is needed to be designed to comprehensively check the temperature resistance limit of the material, check whether the material meets the requirement of working at the corresponding temperature and ensure the effectiveness of engine material selection.
Disclosure of Invention
The invention aims to solve the problems that the temperature performance data of the existing material is limited, and the existing metal ignition test cannot provide high-temperature high-pressure oxygen-enriched conditions, so that the ignition point of the material is difficult to verify, and provides a device and a method for examining the ignition point test of the material.
In order to achieve the purpose, the technical solution provided by the invention is as follows:
a material ignition point test and assessment device is characterized by comprising a fuel gas generator, a water cooling section, a test piece clamping section, a monitoring section and a process spray pipe which are sequentially communicated; the fuel gas generator is used for providing high-temperature and high-pressure oxygen-enriched fuel gas for the test piece to be tested; the length of the water cooling section is more than or equal to 600mm and is used for improving the uniformity of fuel gas, theoretically, the longer the length is, the more uniform the fuel gas flow field is, but the longer the body is, the more troublesome the fixation is, the cost of the whole device can be increased, and therefore the length is controlled to be not less than 600 mm; the water cooling section and the monitoring section are both provided with a temperature sensor and a pressure sensor which are used for monitoring the gas temperature, the pressure and the pressure fluctuation condition at the front and the back of the test piece of the nuclear to be tested; the process nozzle is used for controlling the inflow pressure of the oxygen-enriched fuel gas, and the inflow pressure can be changed by replacing process nozzles with different throat sizes; the water cooling section, the test piece clamping section, the monitoring section and the process spray pipe are all made of high-temperature alloy materials.
Furthermore, in order to examine the temperature resistance limit and performance of the material in a high-temperature and high-pressure gas scouring environment, the oxygen-enriched gas provided by the gas generator has the temperature of 800K-900K, the pressure of 12-16 MPa, the oxygen content of 89%, the flow rate of 100-500 m/s and a wider examination range.
Preferably, in order to further improve the uniformity of the fuel gas, the water cooling section comprises two water-saving cold fuel gas pipes which are communicated with each other; the water-cooling gas pipe comprises a gas channel, a first flange and a second flange which are respectively arranged at two ends of the gas channel, and a cooling working medium inlet pipe joint and a cooling working medium outlet pipe joint which are arranged on the side wall of the gas channel, wherein the cooling working medium inlet pipe joint is close to the second flange, and the cooling working medium outlet pipe joint is close to the first flange; a cooling working medium inlet liquid collecting cavity is arranged at the joint of the cooling working medium inlet pipe joint and the fuel gas channel, and a cooling working medium outlet liquid collecting cavity is arranged at the joint of the cooling working medium outlet pipe joint and the fuel gas channel; a plurality of cooling channels extending along the axial direction of the gas channel are arranged in the side wall of the gas channel, one end of each cooling channel is communicated with a cooling working medium inlet pipe connector through the cooling working medium inlet liquid collecting cavity, and the other end of each cooling channel is communicated with a cooling working medium outlet pipe connector through the cooling working medium outlet liquid collecting cavity; the communication part of the cooling working medium inlet pipe joint and the cooling working medium inlet liquid collecting cavity and the communication part of the cooling working medium outlet pipe joint and the cooling working medium outlet liquid collecting cavity are respectively provided with a grid structure for transitional connection and uniform flow; the thickness of the grid structure is greater than or equal to 5 mm. Of course, only one section of water-cooling gas pipe meeting the length requirement can be adopted.
Preferably, in order to facilitate installation of the temperature sensor and the pressure sensor, the outer wall of the gas channel is also provided with a plurality of gas temperature and pressure test interfaces; the cooling channel is in annular communication at a gas temperature and pressure test interface; in order to avoid the local over-high temperature of the flange, one part of the cooling working medium inlet liquid collecting cavity is positioned at the outlet end of the cooling working medium inlet pipe joint, and the other part of the cooling working medium inlet liquid collecting cavity is positioned in the second flange; one part of the cooling working medium outlet liquid collecting cavity is positioned at the inlet end of the cooling working medium outlet pipe joint, and the other part of the cooling working medium outlet liquid collecting cavity is positioned in the first flange; the thickness of the inner wall of the gas channel at the cooling working medium inlet liquid collecting cavity and the cooling working medium outlet liquid collecting cavity is larger than that of the inner wall of the gas channel at the cooling channel.
Preferably, in order to make the cooling working medium flow more uniformly and improve the cooling effect, an included angle a1 between the inner wall of the cooling working medium inlet pipe joint close to the second flange and the inner wall of the gas channel along the common axial section of the two, and an included angle a1 between the inner wall of the cooling working medium outlet pipe joint close to the first flange and the inner wall of the gas channel along the common axial section of the two are both less than or equal to 40 degrees; the cooling working medium inlet liquid collecting cavity and the cooling working medium outlet liquid collecting cavity are the same in structure and are cavities with gradually-changed sections, and a large cavity, a middle cavity and a small cavity which are sequentially communicated are divided from the flange end to the middle of the gas channel; an included angle a3 between the outer wall of the small cavity and the inner wall of the gas channel along the common axial section of the small cavity and the inner wall of the gas channel is less than or equal to 40 degrees, an included angle a4 between the inner wall of the small cavity and the inner wall of the gas channel along the common axial section of the small cavity and the inner wall of the gas channel is less than or equal to 20 degrees, and an included angle a2 between the outer wall of the middle cavity and the inner wall of the gas channel along the common axial section of the middle cavity; an included angle a6 between the section of the cooling channel at the outer side of the gas temperature and pressure test interface and the bottom surface of the cooling channel is less than or equal to 45 degrees; the gas temperature and pressure test interface periphery wholly is the round platform structure, round platform structure outer wall and gas passageway inner wall are along the contained angle a5 between the common axial section of both less than or equal to 45.
Preferably, the section of the inlet end of the cooling working medium inlet pipe joint is circular, the section of the outlet end of the cooling working medium inlet pipe joint is oval, the oval long shaft is axially arranged along the outer wall of the fuel gas channel, and the shape of the cooling working medium inlet pipe joint gradually changes from the inlet end to the outlet end and is in smooth transition; the inlet end section of the cooling working medium outlet pipe joint is oval, the long axis of the oval is axially arranged along the outer wall of the fuel gas channel, the section of the outlet end is round, and the shape from the inlet end to the outlet end is gradually changed and is in smooth transition; and the cooling working medium inlet liquid collecting cavity and the cooling working medium outlet liquid collecting cavity are both annular cavities.
Preferably, the specimen holding section comprises a specimen mount table and a pressure plate; in order to avoid gas leakage and accidents, the test piece mounting table is hermetically mounted between the water cooling section and the monitoring section, a gas flow channel is axially arranged in the test piece mounting table, and a test piece mounting groove to be examined is radially arranged at the middle section of the test piece mounting table; in order to reduce the flow resistance, the inner wall of the test piece mounting table is in arc transition from the gas inlet end to the mounting groove, and the sectional area of a flow channel is gradually reduced; the pressure plate is circular and is arranged in the inner cavity of the specimen mounting table and used for pressing the nuclear specimen to be tested (namely, the gas outlet end of the specimen mounting table enters the inner cavity of the specimen mounting table to press the nuclear specimen to be tested). The shape of the test piece can be designed as required, and the coating can be sprayed on the surface of the test piece to check the performance of the coating, mounting ends are reserved at two ends of the test piece, the coating can not be coated at the mounting ends, so that the mounting sizes of the two ends are ensured, and the test piece is convenient to mount.
Preferably, the circumferential direction of the pressure plate is in threaded fit with the inner wall of the test piece mounting table, the test piece to be tested is pressed tightly in a screwing mode, and a clamping groove is formed in the end face, close to the gas outlet end, of the pressure plate, so that the pressure plate can be screwed and disassembled conveniently by using a tool; the two pressing plates are used for preventing looseness by utilizing double threads and sequentially pressing the test piece to be examined along the axial direction; in order to save the test cost, the installation groove and the test piece to be tested are adjusted in size, so that the installation groove is simultaneously provided with a plurality of test pieces to be tested in the radial direction, and the purpose of testing a plurality of test pieces in one test is further met.
Preferably, the water-cooling gas pipe is integrally formed through 3D printing; the process spray pipe adopts a water cooling mode, and a groove milling structure is arranged between the inner wall and the outer wall of the process spray pipe, so that the process spray pipe is favorable for repeated use.
Meanwhile, the invention also provides an assessment method adopting the material ignition point test assessment device, which is characterized by comprising the following steps:
1) fixedly installing the test piece to be examined in the test piece clamping section, and assembling the material ignition point test examining device in place;
2) the assembled examination device is arranged on a test bed for pre-test examination;
3) starting the assessment device, performing an assessment test on the test piece, and recording the gas temperature, pressure and pressure fluctuation conditions before and after the test piece;
4) after the test is finished, cooling the device to be tested, detaching the test piece clamping section from the space between the water cooling section and the monitoring section, and taking out the tested test piece;
5) and (5) checking the checked test piece to obtain corresponding data of the material ignition point test, and finishing the check of the test piece.
If more test pieces need to be examined, the method also comprises the following steps:
6) fixedly installing another batch of test pieces to be examined in the test piece clamping section, reinstalling the test piece clamping section between the water cooling section and the monitoring section, and repeating the steps 2) to 5);
7) and repeating the step 6) until all the test pieces to be examined are examined, detaching the examination device from the test bed, and finishing the examination test.
The invention has the advantages that:
1. the invention has simple structure, adopts the fuel gas generator, is a test environment of the nuclear test piece to be tested, has high maximum test temperature, wide test range and reliable test data, can comprehensively test the temperature resistance limit and performance of the material, and can test whether the material meets the use requirement at the corresponding working temperature, thereby solving the problem that the ignition point of the current material is difficult to verify and reducing the development risk of a novel engine (such as a high-performance liquid oxygen kerosene afterburning cycle engine).
2. The invention simultaneously meets the conditions of high temperature (above 800K), high pressure (above 12 MPa) and oxygen enrichment (above 89% of oxygen content) for the first time, and the gas flow velocity simulates the flow velocity (above 100 m/s) of the inlet of the turbine stator blade of the engine; the test working condition environment is closer to the actual working condition of the engine, and the ignition point of the metal material is more fully checked; meanwhile, the examination device can simulate the incoming flow temperature by adjusting the mixing ratio and the flow of the gas generator; the incoming flow pressure was simulated by varying the throat size of the process nozzle.
3. The water-cooling gas pipe adopts a structural design facing a 3D printing process, realizes the integral unsupported design of a cooling working medium inlet pipe joint, a cooling working medium inlet liquid collecting cavity, a cooling channel and the like and a gas pipeline, can meet the integral one-step forming requirement of the 3D printing technology, does not need a plurality of machine frames, brazing, butt welding and other procedures in the traditional process link, greatly shortens the processing and turnover period of a product, has better product consistency, connection strength and rigidity, more effectively controls the quality, and greatly reduces the development cost.
4. The grid structure arranged at the communication part of the pipe joint and the liquid collecting cavity of the water-cooling gas pipe has three functions: firstly, the outer wall of the fuel gas channel and the liquid collecting cavity are in transition connection; secondly, the cooling working medium can be prevented from directly impacting the inner wall of the liquid collecting cavity, and the inner wall of the liquid collecting cavity is protected; and thirdly, the flow of the cooling working medium can be primarily distributed, and the primary flow equalization can be performed on the cooling working medium.
5. In a traditional gas channel with milling groove cooling, a liquid collecting cavity is positioned between an outer wall and a flange, and a gas pipeline at the flange part cannot be cooled; the water-cooling gas pipe has the cooling and connecting functions of the flanges, and the flanges at the two ends are cooled by penetrating parts of the cooling working medium inlet liquid collecting cavity and the cooling working medium outlet liquid collecting cavity into the corresponding end flanges, so that the local overhigh temperature of the flanges is avoided, and the overall structure length can be shortened.
6. The profiles of the cooling working medium inlet pipe joint and the cooling working medium outlet pipe joint in the water-cooling gas pipe adopt a gradually expanding form, namely one end for connecting with an external interface is circular so as to be convenient for butt joint with a standard interface, and the other end is oval, so that the influence of the joint on the space of the flange can be effectively reduced while the flow area of the joint with a gas channel is effectively increased, and the circumferential space of the outer wall of the gas channel and the flange at the end part is fully utilized, and the complete smooth transition from a circular port to an oval port is realized in a smaller design space; the effective flow area of the inlet channel is increased, so that the cooling working medium can be ensured to fill the liquid collecting cavity fully and then uniformly flow to each circumferential cooling channel, and the defect that the structure is invalid due to overhigh temperature of part of gas pipelines caused by uneven distribution of the flow of the cooling working medium in the circumferential cooling channels is avoided; the oval port and the liquid collecting cavity are integrally designed, so that the integral structure is more compact.
7. The characteristic angles of the joints of the cooling working medium inlet pipe joint and the cooling working medium outlet pipe joint of the water-cooling gas pipe are less than or equal to 40 degrees, the characteristic angles a2 of the cooling working medium inlet liquid collecting cavity and the cooling working medium outlet liquid collecting cavity are less than or equal to 30 degrees, a3 of the cooling working medium inlet liquid collecting cavity and the cooling working medium outlet liquid collecting cavity are less than or equal to 40 degrees, and a4 of the cooling working medium outlet liquid collecting cavity and the cooling working medium outlet liquid collecting cavity are less than or equal to 20 degrees.
8. According to the invention, the variable cross-section design is adopted between the cooling working medium inlet liquid collecting cavity and the cooling channel of the water-cooling gas pipe, and between the cooling working medium outlet liquid collecting cavity and the cooling channel, so that the inner wall thickness of the gas channel in the liquid collecting cavity area is ensured to be relatively large, and the strength requirement can be met; on the other hand, the thickness of the inner wall of the gas channel in the liquid collection cavity area is large, so that the flow resistance is increased, the local throttling effect is achieved, and the liquid collection cavity can be fully filled with the cooling working medium after the cooling working medium enters the pipeline.
9. The water-cooling gas pipe can integrate a gas temperature and pressure testing interface, is convenient to install a temperature sensor and a pressure sensor, is provided with a cooling channel at the gas temperature and pressure testing interface and is communicated annularly, and the outer circumference of the gas temperature and pressure testing interface is of a circular truncated cone structure, so that smooth flowing of working media at the gas temperature and pressure testing interface can be ensured; and the contained angle a5 less than or equal to 45 between the axial section jointly is followed to round platform structure outer wall and gas channel inner wall, and cooling channel is in contained angle a6 less than or equal to 45 between the section in the gas temperature and pressure test interface outside and the cooling channel bottom surface can satisfy the whole shaping requirement of 3D printing technology, satisfies the intensity demand, avoids adding bearing structure.
10. The examination device can be repeatedly used, the examination method is simple and convenient to operate, the test piece is convenient to disassemble and replace, a plurality of test pieces can be installed in one-time test, the multi-material comparison test is convenient to perform, and the test cost can be greatly reduced.
Drawings
FIG. 1 is a schematic structural diagram of a material ignition point test assessment device according to the present invention;
FIG. 2 is a schematic structural view of a specimen clamping section in the device for testing ignition point of material according to the present invention;
FIG. 3 is a schematic view of a test piece mounting table in the test piece holding section;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a schematic view of a pressing plate in the specimen holding section;
FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5;
FIG. 7 is an isometric view of a water-cooled gas pipe in the material ignition point test assessment device of the present invention;
FIG. 8 is a sectional view of a water-cooled gas pipe according to the present invention;
FIG. 9 is a partial cross-sectional view of the water-cooled gas pipe at the cooling medium inlet coupling and the cooling medium inlet manifold according to the present invention;
FIG. 10 is a sectional view of the water-cooled gas pipe at the cooling passage in the present invention;
FIG. 11 is a partial view of a gas temperature and pressure test interface at the cooling channel of the water-cooled gas pipe according to the present invention (with the outer wall of the pipe removed);
FIG. 12 is a partial sectional view I of a water-cooled gas pipe cooling channel and a gas temperature and pressure test interface according to the present invention;
FIG. 13 is a partial sectional view II of the water-cooled gas pipe cooling channel and the gas temperature and pressure test interface in the present invention;
the reference numbers are as follows:
1-a gas generator, 2-a water cooling section, 3-a test piece clamping section, 4-a monitoring section, 5-a process spray pipe, 6-a water cooling gas pipe, 7-a test piece mounting table and 8-a pressure plate; 9-mounting groove, 10-clamping groove, 11-test piece to be tested, 12-first water-cooling gas pipe, 13-second water-cooling gas pipe; 14-a first flange, 15-a cooling working medium outlet collecting cavity, 16-a cooling channel, 17-a cooling working medium inlet pipe joint, 18-a second flange, 19-a cooling working medium inlet collecting cavity, 20-a gas channel, 21-a cooling working medium outlet pipe joint, 22-a gas temperature and pressure testing interface and 23-a grid structure.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
as shown in fig. 1-13, a material ignition point test examining device comprises a gas generator 1, a water cooling section 2, a test piece clamping section 3, a monitoring section 4 and a process nozzle 5 which are sequentially communicated; the water cooling section 2, the test piece clamping section 3, the monitoring section 4 and the process nozzle 5 are all made of high-temperature alloy materials.
The fuel gas generator 1 is used for providing high-temperature and high-pressure oxygen-enriched fuel gas for a nuclear test piece 11 to be tested, in order to test the temperature resistance limit and performance of a material in a high-temperature and high-pressure fuel gas scouring environment, the temperature of the oxygen-enriched fuel gas provided by the fuel gas generator 1 is 800K-900K, the pressure is 12-16 MPa, the oxygen content is higher than 89%, the flow speed is 100-500 m/s, the test temperature range is wide, the test working condition environment is closer to the actual working condition of an engine, the material test is more sufficient, and the incoming flow temperature of the test piece is simulated by adjusting the mixing ratio and the flow of fuel and oxygen in the fuel gas generator 1.
The length 600mm of water-cooling section 2, in order to promote the homogeneity of gas, water-cooling section 2 has two 300 mm's water-cooling gas pipe 6 (call first water-cooling gas pipe 12 and second water-cooling gas pipe 13 respectively) to connect and forms, as shown in fig. 7-8, two water-cooling gas pipes 6 all can print integrated into one piece through 3D, it includes gas channel 20, set up first flange 14 and second flange 18 at gas channel 20 both ends respectively, and set up cooling medium inlet pipe joint 17 and cooling medium outlet pipe joint 21 on gas channel 20 lateral wall, wherein, cooling medium inlet pipe joint 17 is more close to second flange 18, cooling medium outlet pipe joint 21 is more close to first flange 14.
The cooling working medium inlet pipe joint 17 and the cooling working medium outlet pipe joint 21 both adopt a gradually expanding form, and the whole body is in a kettle mouth-like shape; the inlet end section of the cooling working medium inlet pipe joint 17 is circular, the outlet end section is oval, the shape from the inlet end to the outlet end is gradually changed and smoothly transited, and the oval long axis is axially arranged along the outer wall of the gas channel; the inlet end section of the cooling working medium outlet pipe joint 21 is oval, the outlet end section is round, the shape from the inlet end to the outlet end is gradually changed and is in smooth transition, and the oval long axis is axially arranged along the outer wall of the fuel gas channel.
A cooling working medium inlet liquid collecting cavity 19 communicated with the outlet end of the cooling working medium inlet pipe joint 17 is arranged at the joint of the cooling working medium inlet pipe joint 17 and the fuel gas channel 20, and a cooling working medium outlet liquid collecting cavity 15 communicated with the inlet end of the cooling working medium outlet pipe joint 21 is arranged at the joint of the cooling working medium outlet pipe joint 21 and the fuel gas channel 20. The cooling working medium inlet liquid collection chamber 19 and the cooling working medium outlet liquid collection chamber 15 are both annular chambers.
The lateral wall of gas passageway 20 is hollow structure, is provided with in this hollow structure along gas passageway 20 axial extension a plurality of side by side, the interval sets up and along the cooling channel 16 of gas passageway 20 circumference equipartition, and cooling channel 16's one end is passed through cooling working medium entry collecting chamber 19 and is communicate with cooling working medium inlet pipe connector 17, and cooling channel 16's the other end passes through cooling working medium export collecting chamber 15 and cooling working medium outlet pipe connector 21 intercommunication. Preferably, the gap between two adjacent cooling channels 16 is greater than or equal to 2mm, no dead angle exists, smooth powder cleaning in the later stage of 3D printing can be ensured, and no excess is generated.
The outer wall of the gas channel 20 of the second water-cooling gas pipe 13 is also provided with a plurality of gas temperature and pressure test interfaces 22; the partial cooling channels 16 are partially interrupted at the gas temperature and pressure test port 22, and the partially interrupted cooling channels are in circumferential communication with each other along the periphery of the gas temperature and pressure test port 22. Here, the first water-cooling gas pipe does not need to be provided with a gas temperature and pressure testing interface.
As shown in fig. 9, the communication part of the cooling working medium inlet pipe joint 17 and the cooling working medium inlet header chamber 19, and the communication part of the cooling working medium outlet pipe joint 21 and the cooling working medium outlet header chamber 15 are provided with grid structures 23 for flow equalization, the thickness of which is greater than or equal to 5mm, and the grid structures 23 play roles of transition connection and primary distribution of the flow of the cooling working medium. In order to ensure the strength, the thickness of the inner wall of the gas channel 20 at the cooling working medium inlet collecting cavity 19 and the cooling working medium outlet collecting cavity 15 is larger than that of the inner wall of the gas channel 20 at the cooling channel 16.
In order to shorten the overall structure length and take flange cooling and connecting effects into consideration, when the water-cooling gas pipe 6 is designed, one part of a cooling working medium inlet liquid collecting cavity 19 is positioned at the outlet end of the cooling working medium inlet pipe joint 17, and the other part is positioned in a second flange 18; similarly, the cooling medium outlet header 15 is located partly at the inlet end of the cooling medium outlet pipe connection 21 and partly within the first flange 14.
As shown in fig. 9, the included angle a1 between the inner wall of the cooling medium inlet pipe joint 17 closer to the second flange 18 and the inner wall of the gas channel 20 along the common axial section of the two is less than or equal to 40 °, and similarly, the included angle a1 between the inner wall of the cooling medium outlet pipe joint 21 closer to the first flange 14 and the inner wall of the gas channel 20 along the common axial section of the two is less than or equal to 40 ° (not shown in the drawings, and only the included angle a1 is shown in the drawings for example); the cooling working medium inlet liquid collecting cavity 19 and the cooling working medium outlet liquid collecting cavity 15 are the same in structure and are cavities with gradually-changed sections, and a large cavity, a middle cavity and a small cavity which are sequentially communicated are divided from the flange end to the middle of the gas channel 20; the included angle a3 between the outer wall of the small cavity and the inner wall of the fuel gas channel 20 along the common axial cross section of the small cavity and the fuel gas channel is less than or equal to 40 degrees, the included angle a4 between the inner wall of the small cavity and the inner wall of the fuel gas channel 20 along the common axial cross section of the small cavity and the fuel gas channel is less than or equal to 20 degrees, and the included angle a2 between the outer wall of the middle cavity and the inner wall of the fuel gas channel 20 along the common axial cross section of the.
As shown in fig. 10 to 13, an included angle a6 between the cross section of the cooling channel 16 outside the gas temperature and pressure test interface 22 and the bottom surface of the cooling channel 16 is less than or equal to 45 °; the periphery of the gas temperature and pressure test interface 22 is integrally in a circular truncated cone structure, and the outer wall of the circular truncated cone structure and the inner wall of the gas channel 20 form an included angle a5 which is less than or equal to 45 degrees between the common axial sections of the two.
The test piece clamping section 3 comprises a test piece mounting table 7 and a pressure plate 8; the test piece mounting table 7 is hermetically mounted between the water cooling section 2 and the monitoring section 4 by using a long bolt, a fuel gas flow channel is axially arranged in the test piece mounting table, and a rectangular mounting groove 9 for mounting a nuclear test piece 11 to be tested is radially arranged in the middle of the test piece mounting table; in order to reduce the flow resistance, the inner wall of the test piece mounting table 7 is in arc transition from the gas inlet end to the mounting groove 9, and the sectional area of the flow channel is gradually reduced; the pressure plate 8 is circular and enters the inner cavity of the test piece mounting table 7 from the gas outlet end of the test piece mounting table 7 to press the test piece 11 to be tested. The shape of the test piece can be designed as required, and the coating can be sprayed on the surface of the test piece to check the performance of the coating, mounting ends are reserved at two ends of the test piece, the coating can not be coated at the mounting ends, so that the mounting sizes of the two ends are ensured, and the test piece is convenient to mount. The pressing plate 8 is provided with two pressing plates which sequentially press the test piece 11 to be checked along the axial direction, each circumferential direction is matched with the inner wall of the test piece mounting table 7 by threads, the test piece 11 to be checked is pressed by a screwing mode, and looseness prevention is realized by double threads; and the end surface of the pressing plate 8 close to the gas outlet end is provided with a clamping groove 10, so that the tool is convenient to use, screw down and disassemble. In order to save the test cost, the sizes of the mounting groove 9 and the test piece 11 to be tested are adjusted, so that the mounting groove 9 is simultaneously provided with a plurality of test pieces 11 to be tested along the radial direction, and the purpose of testing and examining a plurality of test pieces at one time is further met.
The second water-cooling gas pipe 13 and the monitoring section 4 are both provided with a temperature sensor and a pressure sensor for monitoring the gas temperature, pressure and pressure fluctuation conditions at the front and the back of the test piece 11 to be tested.
The process spray pipe 5 is used for controlling the inflow pressure of the oxygen-enriched fuel gas, the inflow pressure can be adjusted by using the process spray pipes 5 with throats of different sizes, the process spray pipes 5 are water-cooled, and a groove milling structure is arranged between the inner wall and the outer wall of each process spray pipe 5, so that the process spray pipes are beneficial to repeated use.
The assessment method adopting the material ignition point test assessment device comprises the following steps:
1) fixedly installing the test piece to be examined in the test piece clamping section, and assembling the material ignition point test examining device in place;
1.1) the gas generator is hermetically connected with a first flange of a first water-cooling gas pipe through a bolt;
1.2) connecting a second flange of the first water-cooling gas pipe with a first flange of a second water-cooling gas pipe in a sealing manner through a bolt;
1.3) connecting the monitoring section with the process spray pipe through a bolt;
1.4) installing one or more test pieces to be tested in the installation groove of the test piece installation platform;
1.5) screwing two pressing plates in sequence by using a tool to press a test piece to be tested, and assembling a clamping section of the test piece;
1.6) installing a test piece clamping section with a test piece between the water cooling section and the monitoring section, and screwing a long bolt through flanges on the water cooling section and the monitoring section to tightly press and fix the test piece clamping section;
the sequence of 1.1) to 1.5) can be changed according to actual operation.
2) The assembled examination device is arranged on a test bed for pre-test examination to ensure safety;
3) starting an examination device, carrying out examination tests on the test piece, and recording the gas temperature, pressure and pressure fluctuation conditions before and after the test piece;
4) after the test is finished, cooling the device to be tested, detaching the test piece clamping section from the space between the water cooling section and the monitoring section, and taking out the tested test piece;
4.1) finishing the test, cooling the device to be tested, and carefully taking down the connecting piece of the test section and the process spray pipe;
4.2) carefully taking down the test piece clamping section;
4.3) screwing out the two pressing plates in sequence by using a tool;
4.4) taking out the examined test piece;
5) and (5) checking the checked test piece to obtain corresponding data of the material ignition point test, and finishing the check of the test piece.
6) Fixedly installing another batch of test pieces to be examined in the test piece clamping section, reinstalling the test piece clamping section between the water cooling section and the monitoring section, and repeating the steps 2) to 5);
7) and repeating the step 6) until all the test pieces to be examined are examined, detaching the examination device from the test bed, and finishing the examination test.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present disclosure.
Claims (10)
1. The utility model provides a material ignition point test examination device which characterized in that: comprises a fuel gas generator (1), a water cooling section (2), a test piece clamping section (3), a monitoring section (4) and a process spray pipe (5) which are communicated in sequence;
the fuel gas generator (1) is used for providing high-temperature and high-pressure oxygen-enriched fuel gas for the test piece (11) to be tested;
the length of the water cooling section (2) is more than or equal to 600 mm;
the water cooling section (2) and the monitoring section (4) are respectively provided with a temperature sensor and a pressure sensor which are used for monitoring the gas temperature, the pressure and the pressure fluctuation condition in the front and the back of the test piece (11) to be tested;
the process nozzle (5) is used for controlling the incoming flow pressure of the oxygen-enriched fuel gas;
the water cooling section (2), the test piece clamping section (3), the monitoring section (4) and the process spray pipe (5) are all made of high-temperature alloy materials.
2. The material ignition point test assessment device according to claim 1, wherein: the oxygen-enriched fuel gas provided by the fuel gas generator (1) has the temperature of 800K-900K, the pressure of 12-16 MPa, the oxygen content of more than 89% and the flow speed of 100-500 m/s.
3. The material ignition point test and assessment device according to any one of claims 1 to 2, wherein: the water cooling section (2) comprises two water-saving cold gas pipes (6) which are communicated with each other;
the water-cooling gas pipe (6) comprises a gas channel (20), a first flange (14) and a second flange (18) which are respectively arranged at two ends of the gas channel (20), and a cooling working medium inlet pipe joint (17) and a cooling working medium outlet pipe joint (21) which are arranged on the side wall of the gas channel (20), wherein the cooling working medium inlet pipe joint (17) is close to the second flange (18), and the cooling working medium outlet pipe joint (21) is close to the first flange (14);
a cooling working medium inlet liquid collecting cavity (19) is arranged at the joint of the cooling working medium inlet pipe joint (17) and the fuel gas channel (20), and a cooling working medium outlet liquid collecting cavity (15) is arranged at the joint of the cooling working medium outlet pipe joint (21) and the fuel gas channel (20);
a plurality of cooling channels (16) extending along the axial direction of the gas channel (20) are arranged in the side wall of the gas channel (20), one end of each cooling channel (16) is communicated with a cooling working medium inlet pipe joint (17) through a cooling working medium inlet liquid collecting cavity (19), and the other end of each cooling channel is communicated with a cooling working medium outlet pipe joint (21) through a cooling working medium outlet liquid collecting cavity (15);
the communication part of the cooling working medium inlet pipe joint (17) and the cooling working medium inlet liquid collecting cavity (19) and the communication part of the cooling working medium outlet pipe joint (21) and the cooling working medium outlet liquid collecting cavity (15) are respectively provided with a grid structure (23) for transitional connection and uniform flow; the thickness of the grid structure (23) is greater than or equal to 5 mm.
4. The material ignition point test assessment device according to claim 3, wherein:
the outer wall of the gas channel (20) is also provided with a plurality of gas temperature and pressure testing interfaces (22); the cooling channel (16) is in annular communication at the gas temperature and pressure test interface (22);
one part of the cooling working medium inlet liquid collecting cavity (19) is positioned at the outlet end of the cooling working medium inlet pipe joint (17), and the other part of the cooling working medium inlet liquid collecting cavity is positioned in the second flange (18); one part of the cooling working medium outlet liquid collecting cavity (15) is positioned at the inlet end of the cooling working medium outlet pipe joint (21), and the other part of the cooling working medium outlet liquid collecting cavity is positioned in the first flange (14);
the thickness of the inner wall of the gas channel (20) at the cooling working medium inlet collecting cavity (19) and the cooling working medium outlet collecting cavity (15) is larger than that of the inner wall of the gas channel (20) at the cooling channel (16).
5. The material ignition point test assessment device according to claim 4, wherein:
an included angle a1 between the inner wall of the cooling working medium inlet pipe joint (17) close to the second flange (18) and the inner wall of the gas channel (20) along the common axial section of the two, and an included angle between the inner wall of the cooling working medium outlet pipe joint (21) close to the first flange (14) and the inner wall of the gas channel (20) along the common axial section of the two are both less than or equal to 40 degrees;
the cooling working medium inlet liquid collecting cavity (19) and the cooling working medium outlet liquid collecting cavity (15) are the same in structure, are cavities with gradually-changed sections, and are divided into a large cavity, a middle cavity and a small cavity which are sequentially communicated from the flange end to the middle of the gas channel (20); an included angle a3 between the outer wall of the small cavity and the inner wall of the gas channel (20) along the common axial section of the small cavity and the gas channel is less than or equal to 40 degrees, an included angle a4 between the inner wall of the small cavity and the inner wall of the gas channel (20) along the common axial section of the small cavity and the gas channel is less than or equal to 20 degrees, and an included angle a2 between the outer wall of the middle cavity and the inner wall of the gas channel (20) along the common axial section of the middle cavity and the gas channel is less than or;
an included angle a6 between the section of the cooling channel (16) at the outer side of the fuel gas temperature and pressure test interface (22) and the bottom surface of the cooling channel (16) is less than or equal to 45 degrees;
the gas temperature and pressure test interface (22) periphery is whole to be round platform structure, round platform structure outer wall and gas passageway (20) inner wall along the contained angle a5 between the axial section jointly of both is less than or equal to 45.
6. The material ignition point test assessment device according to claim 5, wherein:
the inlet end section of the cooling working medium inlet pipe joint (17) is circular, the outlet end section is oval, the oval long shaft is axially arranged along the outer wall of the fuel gas channel (20), and the shape from the inlet end to the outlet end is gradually changed and is in smooth transition; the inlet end section of the cooling working medium outlet pipe joint (21) is oval, the long axis of the oval is axially arranged along the outer wall of the fuel gas channel (20), the section of the outlet end is round, and the shape from the inlet end to the outlet end is gradually changed and is in smooth transition;
and the cooling working medium inlet liquid collecting cavity (19) and the cooling working medium outlet liquid collecting cavity (15) are both annular cavities.
7. The material ignition point test assessment device according to claim 6, wherein: the test piece clamping section (3) comprises a test piece mounting table (7) and a pressure plate (8);
the test piece mounting table (7) is hermetically mounted between the water cooling section (2) and the monitoring section (4), a fuel gas flow channel is axially arranged in the test piece mounting table, and a mounting groove (9) for a test piece (11) to be examined is radially arranged in the test piece mounting table;
the inner wall of the test piece mounting table (7) is in arc transition from the gas inlet end to the mounting groove (9), and the sectional area of a flow channel is gradually reduced;
the pressure plate (8) is annular and is arranged in the inner cavity of the test piece mounting table (7) and tightly presses the test piece (11) to be examined.
8. The material ignition point test assessment device according to claim 7, wherein:
the circumferential direction of the pressure plate (8) is matched with the inner wall of the test piece mounting table (7) by threads, and a clamping groove (10) is formed in the end face, close to the gas outlet end, of the pressure plate (8);
the pressing plate (8) is provided with two parts which sequentially press the test piece (11) to be tested along the axial direction;
and a plurality of test pieces (11) to be checked are simultaneously arranged on the mounting groove (9).
9. The material ignition point test assessment device according to claim 8, wherein:
the water-cooling gas pipe (6) is integrally formed through 3D printing;
the process spray pipe (5) adopts a water cooling mode, and a groove milling structure is arranged between the inner wall and the outer wall of the process spray pipe.
10. An examination method using the material ignition point test examination device of any one of claims 1 to 9, characterized by comprising the steps of:
1) fixedly installing the test piece to be examined in the test piece clamping section, and assembling the material ignition point test examining device in place;
2) mounting the assembled examination device in the step 1) on a test bed for pre-test examination;
3) starting the checked assessment device in the step 2), performing an assessment test on a test piece to be assessed, and recording the gas temperature, pressure and pressure fluctuation conditions before and after the test piece;
4) after the test is finished, cooling the device to be tested, detaching the test piece clamping section from the space between the water cooling section and the monitoring section, and taking out the tested test piece;
5) and (5) checking the checked test piece to obtain corresponding data of the material ignition point test, and finishing the check of the test piece.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2429474A (en) * | 1945-04-25 | 1947-10-21 | Little Inc A | Apparatus for determining the vapor content of a gas |
| CN2303230Y (en) * | 1997-02-04 | 1999-01-06 | 南通石墨设备设计研究所 | Intensive heat conducting sleeve type cooling pipeline for high temp. gas burner having universal expansion joint |
| US20040216535A1 (en) * | 2002-10-15 | 2004-11-04 | Joseph Brostmeyer | High temperature and pressure testing facility |
| CN101393098A (en) * | 2008-10-13 | 2009-03-25 | 查柏林 | Material ablation detection device and method in high-temperature gas |
| WO2014107827A1 (en) * | 2013-01-10 | 2014-07-17 | 湘潭大学 | Testing device for simulating service environment of thermal barrier coating and detecting failure of thermal barrier coating in real time |
| CN104573247A (en) * | 2015-01-11 | 2015-04-29 | 吉林大学 | Optimizing method of simplified model cooling structure of transition section |
| DE102013113600A1 (en) * | 2013-12-06 | 2015-06-11 | Technische Universität Dresden | Test device and high-focus heater for generating high heat flux densities |
| CN105317586A (en) * | 2014-07-21 | 2016-02-10 | 北京航天动力研究所 | High-flow single-inlet annular liquid collecting chamber flow-equilibrating device |
| CN106640424A (en) * | 2016-10-26 | 2017-05-10 | 湖北航天技术研究院总体设计所 | Combustion chamber of liquid rocket engine |
| CN109827191A (en) * | 2019-01-17 | 2019-05-31 | 上海空间推进研究所 | A kind of double cooling re-generatively cooled body portion structures of liquid-propellant rocket engine |
| CN110594036A (en) * | 2019-08-23 | 2019-12-20 | 西北工业大学 | Active cooling double-nozzle support plate ejection rocket of rocket-based combined cycle engine |
-
2020
- 2020-09-29 CN CN202011051851.0A patent/CN112083039B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2429474A (en) * | 1945-04-25 | 1947-10-21 | Little Inc A | Apparatus for determining the vapor content of a gas |
| CN2303230Y (en) * | 1997-02-04 | 1999-01-06 | 南通石墨设备设计研究所 | Intensive heat conducting sleeve type cooling pipeline for high temp. gas burner having universal expansion joint |
| US20040216535A1 (en) * | 2002-10-15 | 2004-11-04 | Joseph Brostmeyer | High temperature and pressure testing facility |
| CN101393098A (en) * | 2008-10-13 | 2009-03-25 | 查柏林 | Material ablation detection device and method in high-temperature gas |
| WO2014107827A1 (en) * | 2013-01-10 | 2014-07-17 | 湘潭大学 | Testing device for simulating service environment of thermal barrier coating and detecting failure of thermal barrier coating in real time |
| DE102013113600A1 (en) * | 2013-12-06 | 2015-06-11 | Technische Universität Dresden | Test device and high-focus heater for generating high heat flux densities |
| CN105317586A (en) * | 2014-07-21 | 2016-02-10 | 北京航天动力研究所 | High-flow single-inlet annular liquid collecting chamber flow-equilibrating device |
| CN104573247A (en) * | 2015-01-11 | 2015-04-29 | 吉林大学 | Optimizing method of simplified model cooling structure of transition section |
| CN106640424A (en) * | 2016-10-26 | 2017-05-10 | 湖北航天技术研究院总体设计所 | Combustion chamber of liquid rocket engine |
| CN109827191A (en) * | 2019-01-17 | 2019-05-31 | 上海空间推进研究所 | A kind of double cooling re-generatively cooled body portion structures of liquid-propellant rocket engine |
| CN110594036A (en) * | 2019-08-23 | 2019-12-20 | 西北工业大学 | Active cooling double-nozzle support plate ejection rocket of rocket-based combined cycle engine |
Non-Patent Citations (1)
| Title |
|---|
| 李 卒等: "不同冷却方式对中心锥冷却效果的影响", 《空军工程大学学报（自然科学版）》, vol. 14, no. 4, pages 5 - 8 * |
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| CN112083039B (en) | 2023-08-08 |
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