An axisymmetric internal parallel dual-mode intake port for rbcc engine and its control method

Abstract

The invention discloses an axisymmetric inner-parallel dual-mode intake port for an RBCC engine and a control method. The air inlet includes a central body, a lip cover, a retractable tail cone, a splitter partition, and an actuating part. The inside of the splitter is an injection channel; a high-speed punching channel is formed between the splitter and the lip cover. At low speed, the retractable tail cone is pushed to the front, and the ejection channel is fully opened; at high speed, the retractable tail cone is pushed to the rear, and the rocket ejection channel is completely closed, and the high-speed ram channel works independently ; thus taking into account the aerodynamic performance of the inlet at high and low speeds, ensuring that the combined engine can work effectively within a wider flight envelope, and has the advantages of small frontal area, compact layout, and large internal usable volume ratio.

Description

technical field [0001] The invention relates to the field of aircraft design, in particular to an axisymmetric internal parallel intake port that can be used in an RBCC engine. Background technique [0002] The Rocket Based Combined Cycle (RBCC) engine organically combines the rocket engine and the ramjet engine. Compared with the traditional rocket engine, the RBCC has a higher average specific impulse in the entire propulsion process, and is different from the ramjet engine. Compared with the engine, the RBCC can start from zero speed and has a larger thrust-to-weight ratio, so it can simultaneously meet the needs of the aircraft for high-thrust acceleration, high-efficiency cruise, and full-airspace and full-speed flight. As an important part of the RBCC engine propulsion system, the intake port must not only efficiently provide air with a certain pressure, temperature and flow rate to the engine in a wide Mach number range, but also shoulder the working mode conversion a...

AI Technical Summary

Problems solved by technology

However, in the case of using a three-dimensional axisymmetric inlet port, it is difficult for the designer to arrange a rotatable splitter plate like the above-mentioned binary RBCC inlet port, which means that once the axisymmetric inlet port configuration is adopted, it is difficult for the designer to Arrange the rocket channel and the stamping channel in parallel, but have to adopt a series layout scheme

However, the tandem RBCC inlet is difficult to protect the turbine module when flying at a high Mach number, and the turbine module will cause a large flow loss when flying at high speed, thus affecting the overall performance of the engine at a high Mach number

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