Fixed geometrical supersonic-speed and high supersonic-speed adjusting air inlet

Abstract

This invention provides a constant geometrical supersonic and hypersonic speed adjustable inlet channel which has fixed geometrical shape and simple structure and can adjust the wave system and the effective passage throat area in the inlet channel. Its features lie in that it includes the inlet channel subject, liplike cap, pipeline, valve, porous or multi-crevicel plate, stabilized voltage tune, water-spreading plate and tune. It extracts a small quantity of relatively high pressure secondary fluid through the water-spreading plate and tune fixed in the high-pressure area of the inner inlet channel. The fluid is then carried through the pipe to the stabilized voltage tune fixed in the all-level constricted sloping plate of the inlet channel subject. After that it pours along the distribution and preinstalled way in the flow field of the inlet channel through the porous or multi-crevice plate which achieves the real-time adjustment of the wave system and the effective passage throat area in the trophy of the inlet channel. The merits of this invention are not only the high resistance value in the wide Mach number, the low coefficient of drag relative to the conventional inlet channel, but also the fixed geometrical shape, simple structure and being apt to achieve.

Description

technical field [0001] The invention relates to a supersonic and hypersonic air inlet, in particular to a fixed-geometry supersonic and hypersonic adjustable air inlet which can adjust the inlet wave system and the effective throat area in real time, and has a fixed geometric shape and a simple structure. . Background technique [0002] As one of the three major components of the ramjet, the supersonic and hypersonic inlets directly face the combustion chamber, and are responsible for many functions such as capturing the incoming flow, decelerating, boosting, and rectifying the incoming flow, so its design is quite critical. Flow capture characteristics, total static pressure recovery characteristics and resistance characteristics directly affect the working efficiency and operation capability of the propulsion system. At present, it is generally believed that the flow coefficient of the intake port has the most direct influence on the thrust of the ramjet, and the increase...

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Problems solved by technology

[0005] 1. The purpose of the invention: In order to solve the problem that the existing adjustable inlet needs to be equipped with complicated auxiliary facilities or the sloping plate on the compression surface needs to be rotated, the present invention provides an adjustable inlet with fixed geometry supersonic speed and hypersonic speed. The geometric shape of the inlet port is fixed, the structure is simple, no actuating device is required, and no additional high-pressure gas source is required. Only by changing the opening of the valve set in the main body of the inlet port can the wave system at the mouth of the inlet port and the effective The real-time adjustment of the throat area keeps the wave system at the mouth of the inlet sealed at different Mach numbers, thereby obtaining a high flow coefficient

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