Planar cascade experiment device and experiment system

Abstract

The application provides a planar cascade experiment device and an experiment system. The planar cascade experiment device comprises a device body, the device body comprises a gas inlet section, an experiment section and a gas outlet section which are connected in sequence, and a cascade module is arranged in the experiment section; a sealing element is arranged, the sealing element is provided with a flow guide cavity, the flow guide cavity is provided with a gas inlet and a gas outlet, the flow guide cavity is provided with a flow guide surface, a plurality of flow guide plates are arranged on the flow guide surface at intervals, flow guide channels are formed between adjacent flow guide plates and between the flow guide plates and the inner wall of the flow guide cavity; a gas film supply cavity is in communication with the experiment section; and a sealing supply cavity is in communication with the gas inlet of the flow guide cavity. On the basis of modeling the rotating effect and the outflow of different sealing structures, only a small number of experimental parts need to be quickly replaced, and no component rotation is required, so that the sealing leakage flow under different sealing structures, different tangential velocities and different flow rates can be simulated, and relevant cooling and heat exchange characteristic experiment research and mechanism research can be carried out.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aero-engine / gas turbine experimental design, and particularly relates to a planar cascade experimental device and an experimental system. BACKGROUND

[0002] A gas turbine is an internal combustion engine in which a continuous flow of gas is used to drive a turbine, which in turn powers an output shaft. The gas is continuously compressed by a compressor, mixed with fuel and burned, and then expanded in the turbine section. The gas turbine is a rotary internal combustion engine in which combustion occurs in a combustion chamber and the resultant gases drive a turbine in rotation.

[0003] As shown in the prior art, Figure 14 A test structure for simulating the pre-whirl of turbine dynamic and static disc cavity leakage flow is disclosed. In the test structure, the sealing outflow passes through the dynamic and static disc cavity gap 5, the rim sealing structure 6 and the pre-whirl structure 7 in sequence and then enters the planar cascade flow passage. The pre-whirl structure simulates the tangential velocity of the sealing outflow under a certain sealing structure. In this structure, the combination of the rim sealing structure and the pre-whirl structure simulates the sealing outflow under rotation. The structure is relatively complex, and more components need to be replaced for the experiment. The degree of abstraction for flow mechanism research is insufficient. SUMMARY

[0004] The present application provides a planar cascade experimental device, which can simulate the sealing leakage flow under different sealing structures, different tangential velocities and different flow rates based on the modeling of the rotation effect and the outflow of different sealing structures. The device only needs to quickly replace a small number of experimental components without rotating the components, and can carry out related cooling and heat exchange characteristic experimental research and mechanism research.

[0005] The present application also provides a planar cascade experimental system.

[0006] The present application provides a planar cascade experimental device, which comprises:

[0007] A device body, the device body comprises a gas inlet section, an experimental section and a gas outlet section connected in sequence, a cascade module is arranged in the experimental section, the cascade module comprises a plurality of cascades arranged at intervals, and a cascade flow passage is formed between adjacent cascades and between the cascades and the inner wall of the experimental section;

[0008] A sealing component, the sealing component is provided with a flow guide cavity, the flow guide cavity is provided with an inlet and an outlet, the outlet is in communication with the experimental section and located upstream of the cascade module, the flow guide cavity is provided with a flow guide surface, a plurality of flow guide plates are arranged at intervals on the flow guide surface, and a flow guide channel is formed between adjacent flow guide plates and between the flow guide plates and the inner wall of the flow guide cavity;

[0009] An air film supply cavity in communication with the experimental section;

[0010] A sealing supply cavity in communication with the air inlet of the flow guide cavity.

[0011] According to the planar cascade experimental device provided by the application, the inclination angle of the flow guide surface is alpha, the deflection angle of the flow guide channel is beta, alpha is 30-90 degrees, and beta is 0-60 degrees.

[0012] According to the planar cascade experimental device provided by the application, the cascade module comprises a fixed cascade and a replaceable cascade, and the fixed cascade is fixedly arranged in the experimental section.

[0013] The replaceable cascade is arranged on the cascade end wall member, and the leakage slot of the sealing member is located on one side of the replaceable cascade.

[0014] According to the planar cascade experimental device provided by the application, the sidewall of the experimental section is provided with mounting clamping grooves for mounting the sealing member and the cascade end wall member respectively.

[0015] According to the planar cascade experimental device provided by the application, the air film supply cavity is provided with a first sealing cover plate, the sealing supply cavity is provided with a second sealing cover plate, and the first sealing cover plate and the second sealing cover plate are respectively provided with air inlet pipes.

[0016] According to the planar cascade experimental device provided by the application, the cascade end wall member is provided with an air film hole for communicating the air film supply cavity and the experimental section.

[0017] According to the planar cascade experimental device provided by the application, the device body further comprises a pressure stabilizing section connected with the air inlet section.

[0018] The application further provides a planar cascade experimental system comprising a first air supply module, a second air supply module, a third air supply module and the planar cascade experimental device as claimed in any one of the above.

[0019] The first air supply module is connected with the air inlet section and used for supplying air to the air inlet section.

[0020] The second air supply module is connected with the sealing supply cavity and used for supplying air to the sealing supply cavity.

[0021] The third air supply module is connected with the air film supply cavity and used for supplying air to the air film supply cavity.

[0022] The first air supply module comprises a first pipeline, a first fan and a flow stabilizing device, the air outlet end of the first fan is connected with the inlet of the first pipeline, the flow stabilizing device is arranged on the first pipeline, and the outlet of the first pipeline is connected with the air inlet section;

[0023] The second air supply module comprises a second pipeline and a second fan, the air outlet end of the second fan is connected with the inlet of the second pipeline, and the outlet of the second pipeline is connected with the sealing air supply cavity;

[0024] The third air supply module comprises a third pipeline and a high-pressure gas storage device, the gas outlet of the high-pressure gas storage device is connected with the inlet of the third pipeline, and the outlet of the third pipeline is connected with the gas film air supply cavity.

[0025] The second pipeline is provided with a first valve and a flow meter, and the third pipeline is provided with a second valve.

[0026] The flow guide cavity is arranged on the sealing element, the flow guide surface is arranged in the flow guide cavity, a plurality of flow guide plates are arranged on the flow guide surface at intervals, the flow guide channels are formed between adjacent flow guide plates and between the flow guide plates and the inner wall of the flow guide cavity, the flow guide surface has a flow direction angle in the flow direction, and the flow guide channels have a tangential angle in the circumferential direction, so that the leakage flow in the sealing air supply cavity can be introduced into the planar cascade flow channel and generate circumferential and flow direction velocity components, the simulation of two variables of the sealing leakage flow can be realized by using one sealing element, the simulation of the sealing leakage flow of different sealing structures, different tangential velocities and different flow rates can be realized by quickly replacing a small part of the experimental element without rotating the components on the basis of the simulation of the rotating effect and the outflow of different sealing structures, and the related cooling and heat exchange characteristic experimental research and mechanism research can be carried out. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0028] Figure 1 is a schematic view of an embodiment of the planar cascade experimental device provided by the present application;

[0029] Figure 2 is a rear view of an embodiment of the planar cascade experimental device provided by the present application;

[0030] Figure 3is a side view of the embodiment of the planar cascade experimental device provided by the present application;

[0031] Figure 4 is one of the schematic diagrams of the sealing member in the planar cascade experimental device provided by the present application;

[0032] Figure 5 is the second schematic diagram of the sealing member in the planar cascade experimental device provided by the present application;

[0033] Figure 6 is the sectional view of the sealing member in the planar cascade experimental device provided by the present application;

[0034] Figure 7 is the sectional view of the sealing member in the planar cascade experimental device provided by the present application;

[0035] Figure 8 is the schematic diagram of the cascade end wall member in the planar cascade experimental device provided by the present application;

[0036] Figure 9 is the top view of the cascade end wall member in the planar cascade experimental device provided by the present application;

[0037] Figure 10 is one of the layout diagrams of the gas film holes on the cascade end wall member;

[0038] Figure 11 is the second layout diagram of the gas film holes on the cascade end wall member;

[0039] Figure 12 is the schematic diagram of the flow angle and tangential angle definition in the planar cascade experimental device provided by the present application;

[0040] Figure 13 is the schematic diagram of the embodiment of the planar cascade experimental system provided by the present application;

[0041] Figure 14 is the schematic diagram of the test structure for simulating the pre-whirl of the leakage flow of the turbine dynamic and static disc cavity in the prior art.

[0042] Reference signs:

[0043] 1, device body; 101, air inlet section; 102, experimental section; 103, air outlet section; 2, sealing element; 201, air inlet; 202, air outlet; 203, flow guide surface; 204, flow guide plate; 3, air film supply cavity; 4, sealing supply cavity; 5, fixed blade row; 6, replaceable blade row; 7, blade row end wall element; 8, first sealing cover plate; 9, second sealing cover plate; 10, pressure stabilizing section; 11, first pipeline; 12, first fan; 13, flow stabilizing device; 14, second pipeline; 15, second fan; 16, third pipeline; 17, high-pressure gas storage device; 18, first valve; 19, flow meter; 20, second valve. DETAILED DESCRIPTION

[0044] To make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0045] The plane blade row experimental device and experimental system of the present application will be described below with reference to the drawings. Figures 1-13

[0046] Embodiment 1

[0047] As shown in the front view, rear view, and side view of the plane blade row experimental device embodiments provided by the present application, the plane blade row experimental device of the present embodiment comprises a device body 1, a sealing element 2, an air film supply cavity 3, and a sealing supply cavity 4. Figures 1-3 As shown in the front view, rear view, and side view of the plane blade row experimental device embodiments provided by the present application, the plane blade row experimental device of the present embodiment comprises a device body 1, a sealing element 2, an air film supply cavity 3, and a sealing supply cavity 4.

[0048] Figure 1 As shown in the front view, rear view, and side view of the plane blade row experimental device embodiments provided by the present application, the plane blade row experimental device of the present embodiment comprises a device body 1, a sealing element 2, an air film supply cavity 3, and a sealing supply cavity 4. Figure 2 As shown in the front view, rear view, and side view of the plane blade row experimental device embodiments provided by the present application, the plane blade row experimental device of the present embodiment comprises a device body 1, a sealing element 2, an air film supply cavity 3, and a sealing supply cavity 4.

[0049] Figure 4 As shown in the front view, rear view, and side view of the plane blade row experimental device embodiments provided by the present application, the plane blade row experimental device of the present embodiment comprises a device body 1, a sealing element 2, an air film supply cavity 3, and a sealing supply cavity 4. Figure 5 The air film supply cavity 3 is in communication with the experimental section 102.

[0050] The air film supply cavity 3 is in communication with the experimental section 102.

[0051] ​​​The sealing air supply cavity 4 is in communication with the air inlet 201 of the flow guide cavity.

[0052] It should be noted that in the embodiment of the present application, the device body 1 can be made of transparent material by integral processing, taking transparent organic glass and transparent acrylic plate as examples, which can not only ensure the air tightness of the device body 1 under high-speed airflow, but also facilitate shooting during the experiment, realizing the unity of safety and convenience. In the embodiment of the present application, the cascade module includes six cascades, forming a total of seven cascade flow channels, and the number of cascades in the cascade module is not limited, which can be set according to actual experimental requirements. In the embodiment of the present application, the contraction section is arranged on the air inlet section 101 to improve the gas flow rate. In the embodiment of the present application, the air outlet 202 of the flow guide cavity is a flat slit, and the length of the air outlet 202 corresponds to the transverse dimension of the flow guide cavity. In the embodiment of the present application, the inlet end of the air inlet section 101 is provided with an air inlet connecting surface, and a plurality of mounting holes are arranged in the annular air inlet connecting surface, which facilitates connection with the air supply part. In specific implementation, the air inlet connecting surface can be connected by a bolt and nut assembly.

[0053] The plane cascade experiment device and experiment system provided by the present application, the flow guide cavity arranged on the sealing element 2, the flow guide surface 203 arranged in the flow guide cavity, and a plurality of flow guide plates 204 arranged on the flow guide surface 203 at intervals. Between adjacent flow guide plates 204, a flow guide channel is formed between the flow guide plate 204 and the inner wall of the flow guide cavity. It should be explained that the flow guide surface 203 has a flow direction angle in the flow direction, and the flow guide channel has a tangential angle in the circumferential direction. The definitions of the flow direction angle and the tangential angle are as follows: Figure 12 Therefore, the flow guide cavity can introduce the leakage flow in the sealing air supply cavity 4 into the plane cascade flow channel, and generate circumferential and flow direction velocity components. By using one sealing element 2, the simulation of two variables of sealing leakage flow can be realized. In this way, based on the simulation of the rotating effect and the outflow of different sealing structures, only a small part of the experimental elements need to be quickly replaced without rotating the parts, so that the simulation of the sealing leakage flow under different sealing structures, different tangential velocities and different flow rates can be realized, and related cooling and heat exchange characteristic experiment research and mechanism research can be carried out.

[0054] In the embodiment of the present application, the inclination angle of the flow guide surface 203 is α, and the deflection angle of the flow guide channel is β, α is 30° to 90°, and β is 0° to 60°. In the real engine working condition, different sealing structures at different rotating speeds will result in different circumferential and flow direction velocities, so the flow direction angle α is set to 30° to 90°, and the tangential angle β is set to 0° to 60°. By replacing different sealing elements 2, the simulation of the sealing leakage flow under different sealing structures, different tangential velocities and different flow rates can be realized. Specifically, as shown in Figure 6 and Figure 7As shown, in one embodiment, the inclination angle of the flow guide surface 203 is 45°, and the deflection angle of the flow guide channel is 60°, that is, the flow direction angle is 45°, and the tangential angle is 60°.

[0055] In the embodiment of the present application, the cascade module comprises a fixed cascade 5 and a replaceable cascade 6, the fixed cascade 5 is fixedly arranged in the experimental section 102; further comprising a cascade end wall piece 7, the replaceable cascade 6 is arranged on the cascade end wall piece 7, and the air outlet 202 of the sealing element 2 is located on one side of the replaceable cascade 6. It should be noted that the number of replaceable cascades 6 is set according to requirements, for example, in the embodiment, the number of replaceable cascades 6 is two, and two fixed cascades 5 are arranged on the two sides of the replaceable cascade 6. By arranging the replaceable cascade 6 on the cascade end wall piece 7, different replaceable cascades 6 can be selected according to the test requirements. In the embodiment of the present application, the two replaceable cascades 6 are integrated with the cascade end wall piece 7, which can be integrally formed by 3D printing.

[0056] In the embodiment of the present application, the sidewall of the experimental section 102 is provided with mounting clamping grooves for mounting the sealing element 2 and the cascade end wall piece 7 respectively. It is convenient to quickly install and disassemble the sealing element 2 and the cascade end wall piece 7 (and the replaceable cascade arranged thereon), and after installation is completed, the gap can be sealed by sealing cement to ensure that the air tightness of the device is good. In one embodiment, the cascade end wall piece 7 is provided with a step for clamping in the mounting clamping groove, and the left and right curves of the step of the cascade end wall piece 7 are arranged in a shape that fits the mounting clamping groove, which can play a limiting role for the cascade end wall piece 7, preventing displacement of the cascade end wall piece 7 during the experiment.

[0057] As shown in Figure 2 and Figure 3 In the embodiment of the present application, the air film supply cavity 3 is provided with a first sealing cover plate 8, and the sealing supply cavity 4 is provided with a second sealing cover plate 9, and the first sealing cover plate 8 and the second sealing cover plate 9 are respectively provided with an air inlet pipe. Specifically, the first sealing cover plate 8 is fixed on the air film supply cavity 3 by bolts, and the second sealing cover plate 9 is fixed on the sealing supply cavity 4 by bolts, which is convenient for disassembly and assembly. When the sealing element 2 and / or the cascade end wall piece 7 need to be replaced, the second sealing cover plate 9 and / or the first sealing cover plate 8 can be directly disassembled, and the sealing element 2 and / or the cascade end wall piece 7 can be installed in the corresponding mounting clamping groove.

[0058] In the embodiment of the present application, the cascade end wall piece 7 is provided with an air film hole for communicating the air film supply cavity 3 and the experimental section 102. Specifically, as shown in Figure 10 and Figure 11 The air film hole can be arranged in two ways as shown in the drawings, arranged in the way as shown in Figure 10 , arranged in the way as shown in Figure 11 .

[0059] In this embodiment of the invention, the device body 1 further includes a pressure stabilizing section 10, which is connected to the air intake section 101. By setting the pressure stabilizing section 10, the airflow entering the device body 1 can be stabilized.

[0060] Example 2

[0061] like Figure 13 The diagram shows an embodiment of the planar blade cascade experimental system provided by the present invention. This embodiment of the planar blade cascade experimental system includes a first air supply module, a second air supply module, a third air supply module, and the planar blade cascade experimental device as described in the above embodiment; the first air supply module is connected to the inlet section 101 and is used to supply air to the inlet section 101; the second air supply module is connected to the sealed air supply chamber 4 and is used to supply air to the sealed air supply chamber 4; the third air supply module is connected to the film air supply chamber 3 and is used to supply air to the film air supply chamber 3.

[0062] Specifically, in this embodiment of the invention, the first air supply module includes a first pipeline 11, a first fan 12 and a flow stabilizing device 13. The air outlet of the first fan 12 is connected to the inlet of the first pipeline 11, the flow stabilizing device 13 is disposed on the first pipeline 11, and the outlet of the first pipeline 11 is connected to the air inlet section 101.

[0063] The second air supply module includes a second pipeline 14 and a second fan 15. The air outlet of the second fan 15 is connected to the inlet of the second pipeline 14, and the outlet of the second pipeline 14 is connected to the sealed air supply chamber 4.

[0064] The third gas supply module includes a third pipeline 16 and a high-pressure gas storage device 17. The outlet 202 of the high-pressure gas storage device 17 is connected to the inlet of the third pipeline 16, and the outlet of the third pipeline 16 is connected to the air film gas supply chamber 3.

[0065] Air can be supplied to the air inlet section 101, the sealed air supply chamber 4, and the air film air supply chamber 3 through the first pipeline 11, the second pipeline 14, and the third pipeline 16, respectively. The first fan 12 can be infinitely adjusted through an AD frequency converter to stabilize the fluid flow rate in the first pipeline 11 under the set operating conditions.

[0066] In this embodiment of the invention, a first valve 18 and a flow meter 19 are provided on the second pipeline 14, and a second valve 20 is provided on the third pipeline 16. The first valve 18 can control the on / off state of the second pipeline 14 and the air flow rate within the second pipeline 14. The flow meter 19 can be used to detect the air flow rate in the second pipeline 14. Specifically, the flow meter 19 can be a mass flow meter, which can perform accurate, fast, and efficient detection. The second valve 20 can control the on / off state of the third pipeline 16 and the gas flow rate within the third pipeline 16.

[0067] In one embodiment, the axial chord length of the moving blade is defined as C ax, the air outlet 202 of the seal 2 is located at 0.15C ax upstream of the blade module, the width of the air outlet 202 is 2.5mm, and the main flow angle is 0°. The experimental section 102 is provided with a stepped mounting slot, so that the plate-shaped seal 2 can be fixed to the reserved opening position of the experimental section 102, and the leakage flow gas passes through the seal 2 into the flow passage of the device body 1 through sealing cement.

[0068] When the end wall cooling effect experiment is carried out, the pressure sensitive paint is sprayed on the blade row end wall 7. The pressure sensitive paint will emit red light of 600nm wavelength under the irradiation of 480nm blue light, and oxygen molecules can inhibit this excitation characteristic. In the experiment, the excitation light intensity of the pressure sensitive paint is captured by a CCD camera, and the oxygen partial pressure of the end wall surface can be obtained. The oxygen distribution on the end wall surface is used to infer the carbon dioxide coverage, i.e. the cooling gas coverage.

[0069] When the end wall heat exchange experiment is carried out, the blade row end wall 7 is first covered with an electric heating film, and the electric heating film is sprayed with a layer of black paint to create a uniform background color. A layer of uniform steady-state liquid crystal is sprayed on the black paint. Within a certain temperature range, the color of the steady-state liquid crystal will change in the order of red, green and blue as the temperature rises. In the experiment, the color distribution of the heat load surface after temperature stabilization is obtained by a camera, and the temperature distribution of the heat load surface is obtained. Further, the heat exchange coefficient of the wall surface is obtained by using Newton's cooling formula.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A planar blade cascade experimental apparatus, characterized in that, include: The device body includes an air inlet section, an experimental section, and an air outlet section connected in sequence. The experimental section is provided with a blade cascade module, which includes multiple spaced blade cascades. A blade cascade flow channel is formed between adjacent blade cascades and between the blade cascades and the inner wall of the experimental section. A sealing component is provided with a flow guiding cavity, which has an air inlet and an air outlet. The air outlet is connected to the experimental section and is located upstream of the blade module. The flow guiding cavity has a flow guiding surface, and multiple flow guiding plates are spaced apart on the flow guiding surface. A flow guiding channel is formed between adjacent flow guiding plates and between the flow guiding plates and the inner wall of the flow guiding cavity. An air-film air supply chamber, which is connected to the experimental section; The air supply chamber is sealed, and the sealed air supply chamber is connected to the air inlet of the guide chamber; The guide surface has a flow angle in the flow direction and the guide channel has a tangential angle in the circumferential direction. It can introduce the leakage flow in the sealing air supply chamber into the planar blade channel and generate circumferential and flow velocity components. The two variables of the sealing leakage flow can be simulated experimentally using a single sealing component.

2. The planar blade cascade experimental apparatus according to claim 1, characterized in that, The inclination angle of the guide surface is α, and the deflection angle of the guide channel is β, where α is 30° to 90° and β is 0° to 60°.

3. The planar blade cascade experimental apparatus according to claim 1, characterized in that, The blade cascade module includes a fixed blade cascade and a replaceable blade cascade, with the fixed blade cascade being fixedly installed within the experimental section; It also includes a blade endwall component, the replaceable blade is disposed on the blade endwall component, and the leakage gap of the sealing component is located on one side of the replaceable blade.

4. The planar blade cascade experimental apparatus according to claim 3, characterized in that, The side wall of the experimental section is provided with mounting slots for installing the sealing component and the blade endwall component, respectively.

5. The planar blade cascade experimental apparatus according to claim 4, characterized in that, The air supply chamber is provided with a first sealing cover plate, and the sealed air supply chamber is provided with a second sealing cover plate. The first sealing cover plate and the second sealing cover plate are respectively provided with air inlet pipes.

6. The planar blade cascade experimental apparatus according to claim 3, characterized in that, The blade endwall is provided with a film gas supply hole for connecting the film gas supply chamber and the experimental section.

7. The planar blade cascade experimental apparatus according to claim 1, characterized in that, The device body also includes a pressure stabilizing section, which is connected to the air intake section.

8. A planar blade cascade experimental system, characterized in that, It includes a first air supply module, a second air supply module, a third air supply module, and a planar blade cascade experimental apparatus as described in any one of claims 1-7; The first air supply module is connected to the air intake section and is used to supply air to the air intake section; The second air supply module is connected to the sealed air supply chamber and is used to supply air to the sealed air supply chamber; The third air supply module is connected to the air film air supply chamber and is used to supply air to the air film air supply chamber.

9. The planar blade cascade experimental system according to claim 8, characterized in that, The first gas supply module includes a first pipeline, a first fan, and a flow stabilizing device. The outlet of the first fan is connected to the inlet of the first pipeline, the flow stabilizing device is installed on the first pipeline, and the outlet of the first pipeline is connected to the air inlet section. The second air supply module includes a second pipeline and a second fan. The outlet of the second fan is connected to the inlet of the second pipeline, and the outlet of the second pipeline is connected to the sealed air supply chamber. The third gas supply module includes a third pipeline and a high-pressure gas storage device. The outlet of the high-pressure gas storage device is connected to the inlet of the third pipeline, and the outlet of the third pipeline is connected to the gas film supply chamber.

10. The planar blade cascade experimental system according to claim 9, characterized in that, The second pipeline is equipped with a first valve and a flow meter, and the third pipeline is equipped with a second valve.

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