Super-high-hypersonic-speed two-dimensional inlet channel starting assisted vortex control adjustable valve device

A hypersonic and valve device technology, applied in jet propulsion devices, gas turbine devices, machines/engines, etc., can solve the problems of boundary layer removal, acceleration to high speed, acceleration, etc., to achieve control and facilitate restarting Effect

Active Publication Date: 2019-04-23
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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AI Technical Summary

Problems solved by technology

[0005] (1) Suction control is currently the most widely used flow control method in ground tests and flight tests. It can indeed effectively improve the start-up performance of the intake port, but in the harsh working environment with long-term high heat flow and the integration of the airframe propulsion system Under the design concept, how to exclude the high temperature and low energy boundary layer is still full of difficulties and challenges;
[0006] (2) The biggest advantage of blow-off control is that it can control the jet intensity according to the working conditions, which has strong controllability, but it needs to provide additional air source and compression device;
[0007] (3) Acceleration start. Generally, for the combined po

Method used

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  • Super-high-hypersonic-speed two-dimensional inlet channel starting assisted vortex control adjustable valve device
  • Super-high-hypersonic-speed two-dimensional inlet channel starting assisted vortex control adjustable valve device
  • Super-high-hypersonic-speed two-dimensional inlet channel starting assisted vortex control adjustable valve device

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[0039] The present invention can be used for auxiliary starting when the contact point air inlet is just opened and restarting control after no starting. The specific implementation is as follows:

[0040] 1. For the auxiliary starting when the relay point inlet is just opened, the following steps are included:

[0041] 1.1) Before the ramjet works, the main revolving valve rotates to the maximum position θ max At this time, the inlet of the intake port is sealed. At this time, the angle between the main rotating valve and the bottom wall of the intake port is the largest, and a shock wave is formed on the surface, the secondary rotating valve is closed, and the airflow does not enter the intake port;

[0042] 1.2) When the relay point is reached, the secondary valve opens to a certain degree, and then starts to rotate the main valve gradually (the angle between the main rotating valve and the bottom wall of the intake port decreases), the intake port gradually opens, and at the same ...

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Abstract

The invention discloses a super-high-hypersonic-speed two-dimensional inlet channel starting assisted vortex control adjustable valve device. The device comprises a main rotary valve. The bottom of the main rotary valve is hinged to the bottom wall of an air inlet channel external pressure section through a rotary shaft. The rotating angle of the main rotary valve on the bottom wall of the air inlet channel external pressure section is adjusted through a back angle adjusting support, and then the internal shrinkage ratio of an air inlet channel is adjusted. The lower portion of the main rotaryvalve is provided with a polygonal opening. A secondary sliding valve is slidably connected to the front portion of the main rotary valve. The opening degree of the polygonal opening of the main rotary valve is adjusted by sliding the secondary sliding valve. The super-high-hypersonic-speed two-dimensional inlet channel starting assisted vortex control adjustable valve device can implement adjustment on the internal shrinkage ratio of the air inlet channel through flexible rotation of the main valve and meanwhile can effectively control large-scale separation vortexes of the air inlet channelby controlling the opening degree of the secondary sliding valve, so that the starting performance of the air inlet channel is greatly improved. The super-high-hypersonic-speed two-dimensional inletchannel starting assisted vortex control adjustable valve device is suitable for adjustment and control over the open type air inlet channel in the starting process and also suitable for adjustment and control over the non-started air inlet channel during the restarting process.

Description

technical field [0001] The invention relates to a vortex-controlled adjustable valve device for assisting the start-up of a supersonic / hypersonic binary inlet, and belongs to the technical field of hypersonic air intake and exhaust. Background technique [0002] The intake port is an important part of the air-breathing scramjet engine to capture and compress air for combustion in the combustion chamber. For the engine to work normally, the intake port must work in the starting state. Therefore, inlet start is the basic prerequisite for the normal operation of hypersonic propulsion vehicles powered by scramjet engines. [0003] The hypersonic inlet will not start due to various disturbances such as angle of attack, side slip angle, combustion chamber back pressure, boundary layer or vortex engulfment. Once the air inlet is not activated, the engine cannot produce enough thrust, the resistance of the aircraft increases sharply, the combustion chamber stalls, and even the air...

Claims

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Application Information

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IPC IPC(8): F02C7/042F02C7/057
CPCF02C7/042F02C7/057
Inventor 苏纬仪马涛关李鑫张堃元
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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