A sern structure for tbcc with pressurized flow control device

Abstract

The invention relates to a pressurization flow control device-containing SERN structure for a TBCC. The SERN structure comprises a lower wall surface of a single expansion ramp nozzle, a contraction section of the single expansion ramp nozzle and a single expansion ramp nozzle single-side expansion section, and further comprises the pressurization flow control device arranged on the single expansion ramp nozzle single-side expansion section, wherein the pressurization flow control device comprises a U-shaped communicating pipeline and a supercharger arranged on the U-shaped communicating pipeline; besides, a front port of the U-shaped communicating pipeline is positioned in front of an intersection point of an oblique shock wave and the single expansion ramp nozzle single-side expansion section; and a back port of the U-shaped communicating pipeline is arranged at the back of the intersection point of the oblique shock wave and the single expansion ramp nozzle single-side expansion section. According to the SERN structure, airflow flowing through the communicating pipeline is pressurized, extra airflow in a diverging zone is extracted and then is ejected from the front port at a relatively high speed, so that the separation zone range is greatly decreased and even eliminated, the shock wave is moved forwards, the static pressure distribution of a main flow is changed, and the working condition of overexpansion operation is improved.

Description

technical field [0001] The invention relates to the technical field of aero-engines, in particular to a single-slope expansion nozzle structure with flow control applied to hypersonic aircraft, specifically a nozzle that can realize thrust coefficient recovery and pitch moment control under nozzle over-expansion structure. Background technique [0002] At present, since the human figure began to appear in the sky, the demand for flight has increased day by day. Especially since entering the 21st century, the low-cost delivery of space loads, the rapid strike on ultra-long-distance targets, and the high-speed transportation around the world, all these and other goals have made people's demand for long-range, high-speed aircraft increasingly expanding, such as A high-speed aircraft powered by a turbo ramjet (TBCC). This kind of hypersonic vehicle is the third revolution in the history of world aviation after propellers and jet aircraft. It will have an immeasurable and far-...

AI Technical Summary

Problems solved by technology

A lot of research has been carried out on this problem at home and abroad, and many solutions have been proposed, most of which require complex mechanical control systems, but the mechanical system will increase the weight of the engine and increase the number of moving parts of the nozzle in a high-temperature environment. Increase the burden on the cooling system, increase the design cost, increase the radar reflection area, and reduce the stealth performance of the aircraft

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