Pneumatic revolving door device and method for self-starting test outlet of shock tunnel air inlet channel

Abstract

The invention provides a pneumatic revolving door device for a self-starting test outlet of a shock tunnel air inlet channel, a method for performing high-speed photography on the action process of the self-starting test outlet pneumatic revolving door of the shock tunnel air inlet channel by using the device, and a throttling method for performing the self-starting test of the shock tunnel air inlet channel. The device comprises a door plate positioned at the end part of the outlet of the air inlet channel, the door plate is rotatably connected with a rotating shaft through a shaft sleeve, the rotating shaft is fixed below the outlet end part of the air inlet channel, the lower edge of the door plate is vertically connected with a limiting step, the included angle between the inclined door plate and the end surface of the outlet of the air inlet channel is 3-5 degrees, and after the flow field of a wind tunnel is stable, the pneumatic revolving door rotates around the rotating shaft under the pushing of air flow and is opened to start the air inlet channel; and the method can conveniently carry out effective automatic throttling control on the self-starting test of the shock tunnel air inlet channel, and provides reliable test basis for mastering the flow control rule of the air inlet channel and the design of the hypersonic speed air inlet channel.

Description

technical field [0001] The invention belongs to the technical field of experimental aerodynamics, and relates to a pneumatic revolving door device for the self-starting test outlet of the inlet of a shock tunnel, and uses the device to perform the action of the pneumatic revolving door for the self-starting test outlet of the inlet of the shock tunnel The method of high-speed photography, the throttling method of the self-starting test of the shock tunnel inlet. Background technique [0002] The intake port is the first aerodynamic component of the scramjet engine, and its performance will directly affect the working characteristics of the power system. The self-starting and stable operation of the intake port is the prerequisite for the normal operation of the power system. If the intake port does not start, the combustion chamber will not work normally, and the power system will not be able to generate the power it should. Therefore, the self-starting performance is one o...

AI Technical Summary

Problems solved by technology

[0009] ① Equipped with power throttling cone technology, the running time of the motor that pushes the throttling cone forward or backward, the running time of the guide rail slider mechanism or the screw nut mechanism is much longer than the test time of the shock wave tunnel, so it cannot be used for shock wave wind Self-starting test throttling of the intake port of the hole

It has been popularized and used in temporary wind tunnels, but it is possible to use it in shock wave wind tunnels after a lot of additional research is required on synchronous control and response speed

[0011] ③Preset lightweight block technology, it is difficult to control the quality of preset block

One is that if the mass is too light, it will easily cause the block to be blown away by the airflow from the intake duct when the flow field in the wind tunnel is not stable, and the throttling effect of the intake duct will not be achieved, so the throttling test will fail; The air flow in the stable flow field of the hole cannot blow away the blockage, causing the inlet port to fail to start and the inlet port throttling test to fail

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