Self-adaption pulse detonation engine valve system driven by pressure

An engine valve, pulse detonation technology, applied in mechanical equipment, intermittent injection devices, etc., can solve problems such as difficult application, additional drive motor, work delay, etc., to avoid head leakage or air leakage, and improve service life. , to prevent the effect of negative thrust

Active Publication Date: 2017-06-06
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

Rotary valves can realize high-frequency and large-flow supply at the same time, but they have disadvantages such as difficult phase matching and the need for additional drive motors, which are difficult to apply, and are not suitable for working conditions with frequent changes in working conditions
At the same time, researchers have conducted a large number of experiments using reed valves used in ordinary pulsating engines, but because the reed valves rely on the PDE head pressure to actuate, there is also a delay in their work, and the reeds are exposed to high-temperature gas making it easy to damage

Method used

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  • Self-adaption pulse detonation engine valve system driven by pressure

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with specific examples and drawings

[0019] A pressure-driven adaptive pulse detonation engine valve system, each part of the component is in accordance with the attached figure 1 Assemble the structure shown in the attached figure 1 In the direction shown, the left side is the head of the detonation device, and the right side is the tail of the detonation device. The ignition device is installed on the head.

[0020] Since the sliding valves 1-4 are normally open, after the previous cycle ends, the PDE can normally intake air and inject fuel. After the filling process is over, the slow combustion wave generated by the ignition of the head generates a high-pressure detonation wave and back propagation wave through the DDT section. The detonation wave develops towards the tail and the back propagation wave propagates to the head. When the detonation wave propagates to the entrance of the drainage tube 1-1...

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Abstract

The invention provides a self-adaption pulse detonation engine valve system driven by pressure. The system comprises a drainage pipe, a pneumatic piston, a transmission module, a slide valve and an elastic module. The device uses instant high pressure generated by detonation waves for driving the valve to perform self-adaption work, and can control the working time sequence of the valve through changing the position of a pressure inlet. The type of device is initiated at home and abroad, and the device has such advantages as simple structure, quick response, no need of external power and difficult damage, and can be applied to the technical field of pulse detonation engines.

Description

Technical field [0001] The invention relates to the technical field of pulse detonation engines, in particular to a pressure-driven adaptive pulse detonation engine valve system. Background technique [0002] Pulse Detonation Engine (PDE) is a new concept engine that uses the impulse of high temperature and high pressure gas generated by pulse detonation waves to generate thrust. The intermittent working mode of the pulse detonation engine determines that the working frequency has an important influence on its performance, and the improvement of the working frequency depends on the high-frequency valve system. [0003] At present, the main supply methods of PDE include solenoid valve supply, rotary valve supply and valveless adaptive supply. Among them, the valveless adaptive supply mode requires extremely high supply pressure, and is generally only used for Pulse Detonation Rocket Engine (PDRE). The solenoid valve uses the interaction of the electromagnetic force in the valve to...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K7/02
CPCF02K7/02
Inventor 范玮迟烨青何建男李清安
Owner NORTHWESTERN POLYTECHNICAL UNIV
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