CN213148312U - Annular cascade performance tester - Google Patents
Annular cascade performance tester Download PDFInfo
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- CN213148312U CN213148312U CN202021206586.4U CN202021206586U CN213148312U CN 213148312 U CN213148312 U CN 213148312U CN 202021206586 U CN202021206586 U CN 202021206586U CN 213148312 U CN213148312 U CN 213148312U
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Abstract
The utility model provides an annular cascade performance tester, which comprises an air inlet system, an exhaust system, a boundary layer suction system and an air conditioning system; the utility model provides an annular cascade capability test ware can cover inferior, stride, supersonic speed scope, cover plane cascade, fan-shaped cascade and annular cascade test function, but the actual flow field condition of full simulation cascade test section can provide better flow field quality to the secondary flow loss condition in the accurate reflection cascade can obtain more accurate flow field parameter so that assess the performance of cascade, thereby confirm to improve the direction.
Description
Technical Field
The utility model relates to an aeroengine tests technical field, concretely relates to annular cascade tester.
Background
The performance indexes of the aero-engine are directly influenced by the performance of the cascade, complex flow field structures and loss mechanisms in cascade runners are studied in detail, and methods for reducing energy loss in the cascade runners and improving aerodynamic performance of the cascade are explored, so that the method becomes important research content for improving the performance of the aero-engine. Known from the existing cascade theory and test, the flow in the cascade is very complex, the influence factors are very many, the geometrical factors such as airflow corner and consistency influence pneumatic factors, such as the interference of incoming flow Mach number and shock wave boundary layer, and the like, the mutual interference of airflow wake and blade movement is caused by the staggered arrangement of the rotating blades and the static blades, and the interference influence of viscosity action and shock wave in the flow causes the unsteady and extreme complexity of the flow in the cascade and presents the common rotation and three-dimensional characteristics of the rotating machinery; therefore, how to establish a better tester to accurately determine the flow field parameters in the blade cascade is necessary and urgent.
Disclosure of Invention
The utility model discloses to the defect that prior art exists, provide an annular cascade capability test ware.
The annular cascade performance tester is characterized by comprising an air inlet system, an exhaust system, a boundary layer suction system and a cold air system;
the air inlet system comprises an air source, an air inlet pipeline, a straight pipe section, a diffusion section, a stabilization section, a convergence section, a spray pipe and a cascade test section; the air inlet pipeline comprises a large air inlet pipeline, a small air inlet pipeline and an air outlet pipeline; the large and small air inlet pipelines are converged and connected to form a three-way joint; the rear part of the three-way joint is connected with the straight pipe section through an expansion joint; a conical diffusion section is connected behind the straight pipe section; the diffusion section is connected with the stabilization section; the stabilizing section comprises a rectifying section and a voltage stabilizing section; a sintered wire mesh and a honeycomb rectifier are sequentially arranged in the rectifying section; a damping net is arranged in the pressure stabilizing section; the voltage stabilizing section is connected with the convergence section; the convergent section is connected with the cascade test section through a spray pipe; the outlet of the cascade test section is connected with an exhaust system; the cascade test section comprises an air inlet section and an air outlet section, wherein inlet and outlet measuring sections are respectively arranged, and total pressure probes, total temperature probes and static pressure measuring points are uniformly distributed;
the exhaust system comprises a horizontal exhaust collector fixed along the horizontal direction and a movable exhaust collector movable along the circumferential direction; the movable exhaust collector is fixed on an arc guide rail and can move in a stepless manner along the arc guide rail; the horizontal exhaust collector and the movable exhaust collector are respectively connected with a section of pipeline and are communicated with the same exhaust silencing tower;
the boundary layer suction system comprises a vacuum pump, a vacuum box and a vacuum pipeline; the vacuum pump is connected with the vacuum box through an electric gate valve; the vacuum box is divided into a plurality of suction branches which are connected with the boundary layer of the cascade test section;
the cold air system comprises an air source and a distributor; the gas source is connected with the distributor through a gate valve and a pipeline; the distributor is connected with the cascade test section through a plurality of cooling branches.
The utility model discloses a concrete beneficial effect as follows:
(1) the utility model provides an annular cascade capability test ware can cover inferior, stride, supersonic speed scope, cover plane cascade, fan-shaped cascade and annular cascade test function, but the actual flow field condition of full simulation cascade test section can provide better flow field quality to the secondary flow loss condition in the accurate reflection cascade can obtain more accurate flow field parameter so that assess the performance of cascade, thereby confirm to improve the direction.
(2) The air inlet system in the utility model is provided with a large air inlet pipeline, a small air inlet pipeline and an air discharge pipeline, three pipelines are provided with an air regulating valve and a fine adjusting valve, the three pipelines can jointly adjust the air inlet pressure and the flow, the adjusting range is more fine, the adjusting precision is higher, the requirements of the annular cascade performance test on different air inlet pressures and flows are met, the flow field in the downstream test section is ensured to have higher Mach number control precision, and the flow field quality is good; meanwhile, the exhaust system is provided with a horizontal exhaust collector and a movable exhaust collector, wherein the movable exhaust collector can move in a stepless manner along a pre-laid arc guide rail within the variation range of the outlet airflow angle of the blade grid test section, so that the exhaust gas discharged by the blade grid test section can be completely recovered, and the normal test process is not influenced.
(3) The utility model is provided with a boundary layer suction system and an air conditioning system which are matched with the blade grid test section to work, wherein the boundary layer suction system can suck the left and right side walls, the upper and lower chambers of the blade grid test section and can adjust the suction pressure and the suction quantity, so that the flow field formed around the blade grid test section is the flow field required by the test, and the test result is ensured to be accurate enough; and the cold air system can introduce cooling air to the turbine blades of the blade cascade test section, so that the tester has the condition for carrying out the turbine cooling test.
Drawings
FIG. 1 is a schematic diagram of the annular cascade performance tester of the present invention;
FIG. 2 is a layout diagram of the air inlet system and the exhaust system of the annular cascade performance tester of the present invention;
FIG. 3 is a schematic diagram of an air induction system;
FIG. 4 is a schematic view of an exhaust collector configuration;
FIG. 5 is a schematic diagram of a boundary layer pumping system;
FIG. 6 is a schematic diagram of a cooling system;
FIG. 7 is a schematic view of the nozzle carriage structure.
Detailed Description
The present invention will be further explained with reference to the drawings and examples. In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
Example 1
As shown in fig. 1, 2 and 3, the utility model provides an annular cascade performance tester, which comprises an air inlet system, an exhaust system, a boundary layer suction system and an air conditioning system; the air inlet system comprises an air source, an air inlet pipeline, a straight pipe section 13, a diffusion section 14, a stabilization section 15, a convergence section 16, a spray pipe and a cascade test section 17 which are connected in sequence; the air inlet pipeline comprises large and small air inlet pipelines 11 and 12 and an air discharge pipeline 10, and each pipeline is provided with a group of pressure regulating valves (112, 122 and 102 in the figure) and fine adjusting valves (111, 121 and 101 in the figure) so as to ensure that a flow field in a downstream test section has high Mach number control precision; the large and small air inlet pipelines 11 and 12 are converged and connected to form a three-way joint 18; the rear part of the three-way joint 18 is connected with the straight pipe section 13 through an expansion joint; the rear part of the straight pipe section 13 is connected with a conical diffusion section 14, the diffusion section is used for connecting the straight pipe section 13 with a stabilizing section 15, speed reduction and pressurization are carried out, and a flow field is stabilized to a certain extent; the stabilizing section comprises a rectifying section and a voltage stabilizing section; a sintered wire mesh and a honeycomb rectifier are sequentially arranged in the rectifying section, and the honeycomb rectifier and the damping mesh are in modular design; a damping net is arranged in the pressure stabilizing section, a total temperature and total pressure mounting seat is arranged near an outlet of the pressure stabilizing section, and 2 total pressure comb-shaped probes with 5 points, 2 total temperature probes with 5 points and 8 static pressure measuring points are arranged on the same plane; the pressure stabilizing section is connected with the converging section, the converging section 16 is connected with the cascade test section 17 through the spray pipe, the cascade test section 17 comprises an air inlet section and an air outlet section, the air inlet section and the air outlet section are respectively provided with an inlet and outlet measuring section, 4 total pressure probes with 5 points, 4 total temperature probes with 5 points and 8 static pressure measuring points are uniformly distributed, and the probes and the measuring points are used for monitoring the flow field condition in real time.
The utility model discloses well cascade test section includes annular cascade test section, fan-shaped cascade test section, plane cascade test section, all with same basic mounting platform adaptation can be being replaced, and wherein annular cascade test section mainly used pressure boost cascade and turbine cascade's subsonic speed test, and fan-shaped cascade test section is used for carrying out the subsonic speed test of pressure boost cascade and turbine cascade, and plane cascade test section mainly is used for carrying out the subspan supersonic test of pressure boost cascade and turbine cascade; considering the difference of the structural forms of the three cascade test sections, in order to facilitate quick replacement, the convergence sections corresponding to the annular cascade test section and the fan-shaped test section and the spray pipe are of an integrated structure; the outlet of the convergent section corresponding to the plane cascade test section is connected with the inlet of the spray pipe through a flange, the centering spigot is positioned, the spray pipe adopts a two-dimensional spray pipe flow channel and consists of a spray pipe box body and a trolley, the spray pipe box body is used for installing and fixing a spray pipe block, and the spray pipe trolley is used for supporting the spray pipe box body, as shown in figure 7; the cascade test section comprises an air inlet section and an air outlet section, wherein inlet and outlet measuring sections are respectively arranged, and total pressure probes, total temperature probes and static pressure measuring points are uniformly distributed.
The exhaust system is connected with the air outlet of the blade cascade test section, and comprises a horizontal exhaust collector 22 fixed along the horizontal direction and a movable exhaust collector 21 movable along the circumferential direction, wherein the horizontal exhaust collector 22 meets the exhaust requirements of an annular blade cascade test, a fan-shaped blade cascade test and a plane blade cascade supersonic test, and the movable exhaust collector 21 mainly meets the exhaust requirements of a sub-transonic pressurizing blade cascade test and a turbine blade cascade test of the plane blade cascade test section; the two exhaust collectors are in a circular convergence structure form; the movable exhaust collector is fixed on an arc guide rail and can move in a stepless manner along the arc guide rail, and the corresponding central angle degree of the arc guide rail is larger than the variation range of the outlet airflow angle of the blade grid test section; the horizontal exhaust collector and the movable exhaust collector are respectively connected with a section of pipeline and are communicated with the same exhaust silencing tower 23, and the exhaust silencing tower adopts a matrix type air inlet silencing element; the rectangular pipe truss is made of carbon steel section (rust-proof treatment). The silencing element matrix unit bodies are manufactured by welding. The blocking area accounts for 56% of the total cross section of the air inlet; the silencing device has no corrosion, falling and emission of foreign matters such as installation parts, fibers, dust and the like and harmful substances.
The event is based on above structure, the utility model provides an annular cascade capability test ware concrete theory of operation as follows: opening a gate valve on a main gas path, sending gas into an air inlet system, respectively or synchronously adjusting the opening degrees of three groups of pressure adjusting valves and fine adjusting valves on a large air inlet pipeline 11, a small air inlet pipeline 12 and an air outlet pipeline 10, namely controlling the flow and pressure of the inlet gas, so that fluid with changed parameters is conveyed through a straight pipe section 13, is decelerated and pressurized at a diffusion section 14, is stabilized at a stabilization section 15, then is sent into a cascade test section 17 through a convergence section 16 and a spray pipe, and forms a flow field meeting the requirements of a cascade test at the cascade test section; the basic mounting platform of the blade cascade test section is provided with a tested blade cascade (an annular blade cascade, a fan-shaped blade cascade and a plane blade cascade), the tested blade cascade rotates along with a turntable on the basic mounting platform to simulate the normal working condition, a probe, a moving and measuring mechanism and the like arranged at the blade cascade test section measure a series of parameters such as a speed field, an airflow deflection angle and the like, and the obtained parameters can reflect the aerodynamic performance of the blade cascade; the movable exhaust collector 22 in the exhaust system is fixed on an arc guide rail, and can move along the arc guide rail in a stepless manner, and the corresponding central angle degree of the arc guide rail is larger than the variation range of the airflow angle at the outlet of the blade lattice test section, so that the gas exhausted from the blade lattice test section can be completely recovered.
To sum up, the utility model discloses based on above structure to based on the similar principle of mach number, use compressed air as the medium, realize annular cascade, fan-shaped cascade and the blowing test under the different mach numbers of plane cascade through corresponding convergent section 16 and spray tube; correspondingly replacing the convergence section, the spray pipe and the test section, and having one of three test functions of an annular cascade, a fan-shaped cascade and a plane cascade; each probe measures flow field parameters of the blade grid test section, wherein the measurement of the velocity field is mainly divided into the measurement of the inlet air flow velocity and the flow direction of the test section and the measurement of the velocity in the test section; measuring the inlet speed of the test section by adopting a method for measuring wall static pressure to calculate the Mach number; and the measurement of the flow direction and the speed of the test section along the way is divided into static pressure measurement and space pressure measurement of the side wall surface of the grid plate, the space pressure measurement adopts a coordinate movement measuring mechanism to be matched with a direction probe for measurement, and meanwhile, space airflow direction angle data is obtained.
Example 2
The embodiment provides a boundary layer suction system for an annular cascade performance tester, which comprises vacuum pumps 31 and 32, a vacuum box 34 and a vacuum pipeline; the vacuum pumps 31 and 32 are connected to a vacuum box 34 through an electric gate valve 33; the vacuum box is divided into a plurality of suction branches which are connected with the boundary layer of the blade grid test section; the suction branch is provided with a regulating valve 35 and a flowmeter 36 and is communicated with the cascade test section, the suction branch is communicated with the suction part of the cascade test section through a hose 37 for suction to ensure that a required flow field is formed, in the embodiment, the suction branch divided by the vacuum box has 8 paths and is mainly used for suction of the four walls of the cascade test section and the surface of the cascade (1 upper parking chamber, 2 lower parking chambers, 2 suction of the boundary layer of the side wall of the test section, 2 suction of the boundary layer of the surface of the cascade and 1 spare suction branch) and is connected with the test section through the hose 37, and the pressure and the suction quantity of each suction branch are regulated by the regulating valve 35; in this embodiment, two vacuum pumps 31 and 32 are commonly provided, so as to better ensure the operation of the boundary layer pumping system and prevent the mutual influence of the 2 vacuum pumps communicated with the vacuum box, separate gas circuits are respectively communicated with the vacuum box, and a gate valve is arranged on the gas circuits; the exhaust end of the vacuum pump is connected with an exhaust silencing tower.
The boundary layer suction system works in the following specific mode:
when the annular cascade performance tester is used for carrying out a cascade performance test, all the suction branch circuits of the boundary layer suction system are communicated with the cascade test section; and starting the vacuum pumps, opening a gate valve arranged between the vacuum pumps and the vacuum box, correspondingly opening a regulating valve on each suction branch, sucking the boundary layer of the cascade test section by the two vacuum pumps along the single gas path, the vacuum box and the suction branches, and changing the flow and pressure of each suction part by adjusting the regulating valve on each suction branch to achieve the purpose of forming a required flow field on the cascade test section.
Example 3
The embodiment provides a cold air system for an annular cascade performance tester, which comprises an air source 41 and a distributor 45; the air source is connected with the distributor 45 through a gate valve 43 and a main air path, a pressure sensor and a temperature sensor 42 are arranged between the air source and the gate valve, an air discharge pipeline serving as a branch is arranged on the main air path, the branch is communicated with an exhaust silencer, and an air discharge pressure regulating valve 44 is arranged on the branch; the distributor adopts a horizontal gas storage tank, 10 flange holes are formed in the straight pipe side of the tank body and used for connecting 10 cold gas branches, the cold gas branches are communicated with the cascade test section through a hose 46, and an adjusting valve 48 and a flowmeter 47 are arranged on the cold gas branches; the distributor is provided with a safety air release valve and a sewage discharge outlet, and a pressure and temperature measuring point is arranged in the distributor, and the distributor has the following specific working modes:
a main air path gate of the air conditioning system is opened, and the air conditioning provided by the air source is sent into a distributor 45 which is mainly used for storing compressed air with certain pressure and maintaining the internal pressure balance to ensure that the pressure of the outlets of the air conditioning branches is close to the same; the distributor sends cold air into each cold air branch, adjusts the adjusting valve 48 on each cold air branch, and controls the cold air flow of each cold air branch; meanwhile, the branch of the main gas path further comprises a gas discharging pipeline, a gas discharging pressure regulating valve 44 is arranged on the gas discharging pipeline, the flow of cooling gas entering the distributor is controlled through the gas discharging pressure regulating valve, and the pressure value in the distributor is controlled at the same time, so that the control precision of each branch regulating valve can be ensured, and the requirement of a turbine blade cooling test can be met.
Example 4
The difference between this embodiment and the first 3 embodiments is that this embodiment further includes a test system, an electrical control system, and a management system, where the test system is responsible for measuring various parameters; the electrical control system is responsible for monitoring and controlling the process equipment and the electrical equipment; and the management system is responsible for information management of the test and measurement and control equipment.
It should be understood that the above examples are only for clearly illustrating the technical solutions of the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. The annular cascade performance tester is characterized by comprising an air inlet system, an exhaust system, a boundary layer suction system and a cold air system;
the air inlet system comprises an air inlet pipeline, a straight pipe section, a diffusion section, a stabilization section, a convergence section, a spray pipe and a cascade test section; the air inlet pipeline comprises a large air inlet pipeline, a small air inlet pipeline and an air outlet pipeline; the large and small air inlet pipelines and the air outlet pipeline are connected with the same air supply main line, and a group of pressure regulating valves and fine adjustment valves which are connected in parallel are arranged on the large and small air inlet pipelines and the air outlet pipeline; an air inlet gate valve is arranged on the air supply main line; the large and small air inlet pipelines are connected in a converging way through a three-way joint; a straight pipe section is connected behind the three-way joint; a conical diffusion section is connected behind the straight pipe section; the diffusion section is connected with the stabilization section; the stabilizing section comprises a rectifying section and a voltage stabilizing section; the voltage stabilizing section is connected with the convergence section; the convergent section is connected with the cascade test section through a spray pipe; a foundation mounting platform is arranged at the blade grid test section; the outlet of the cascade test section is connected with an exhaust system; the cascade test section comprises an air inlet section and an air outlet section, wherein inlet and outlet measuring sections are respectively arranged, and total pressure probes, total temperature probes and static pressure measuring points are uniformly distributed;
the exhaust system comprises a horizontal exhaust collector fixed along the horizontal direction and a movable exhaust collector movable along the circumferential direction; the movable exhaust collector is fixed on an arc guide rail and can move in a stepless manner along the arc guide rail; the horizontal exhaust collector and the movable exhaust collector are respectively connected with a section of pipeline and are communicated with the same exhaust silencing tower;
the boundary layer suction system comprises a vacuum pump, a vacuum box and a vacuum pipeline; the vacuum pump is connected with the vacuum box through an electric gate valve; the vacuum box is divided into a plurality of suction branches which are connected with the boundary layer of the cascade test section;
the cold air system comprises an air source and a distributor; the gas source is connected with the distributor through a gate valve and a pipeline; the distributor is connected with the cascade test section through a plurality of cooling branches.
2. The annular cascade performance tester of claim 1, wherein the cascade test section comprises an annular cascade test section, a fan-shaped cascade test section and a planar cascade test section, all adapted to the same base mounting platform.
3. The annular cascade performance tester of claim 2, wherein the outlet shape of the convergent section corresponding to the annular cascade test section is circular; the shape of an air outlet of a convergent section corresponding to the fan-shaped cascade test section is fan-shaped; and the shape of the air outlet of the convergent section corresponding to the plane blade grid test section is rectangular.
4. The annular cascade performance tester of claim 3, wherein the convergent sections corresponding to the annular cascade test section and the fan-shaped test section are of an integral structure with the nozzle; and the outlet of the convergent section corresponding to the plane cascade test section is connected with the inlet of the spray pipe through a flange, and the centering spigot is positioned.
5. The ring cascade performance tester of claim 4, wherein the nozzle adopts a two-dimensional nozzle flow path and is composed of a nozzle box body and a trolley, the nozzle box body is used for installing and fixing the nozzle block, and the nozzle trolley is used for supporting the nozzle box body.
6. The annular cascade performance tester of claim 1 wherein the suction branch and the cooling branch are each provided with a regulating valve and a flow meter.
7. The annular cascade performance tester of claim 1, further comprising a coordinate displacement mechanism; the coordinate displacement measuring mechanism comprises a three-coordinate displacement measuring mechanism for the plane blade cascade and a cylindrical surface four-coordinate displacement measuring mechanism for the test of the annular blade cascade and the fan-shaped blade cascade.
8. The annular cascade performance tester of claim 1, further comprising a test system, an electrical control system and a management system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021206586.4U CN213148312U (en) | 2020-06-24 | 2020-06-24 | Annular cascade performance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021206586.4U CN213148312U (en) | 2020-06-24 | 2020-06-24 | Annular cascade performance tester |
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| Publication Number | Publication Date |
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| CN213148312U true CN213148312U (en) | 2021-05-07 |
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| CN202021206586.4U Active CN213148312U (en) | 2020-06-24 | 2020-06-24 | Annular cascade performance tester |
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| CN (1) | CN213148312U (en) |
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