Supersonic incoming flow mixing enhancing structure and rocket based combination engine

Abstract

The invention provides a supersonic incoming flow mixing enhancing structure and a rocket based combination engine. The supersonic incoming flow mixing enhancing structure comprises a supersonic incoming flow partition plate; supersonic incoming flow channels are respectively formed in the two sides of the supersonic incoming flow partition plate; the two supersonic incoming flow channels communicate with each other at the tail end of the supersonic incoming flow partition plate and form a supersonic incoming flow mixing area behind the tail end of the supersonic incoming flow partition plate;the supersonic incoming flow mixing area communicates with at least one supersonic incoming flow channel through at least one flow guide pipe; and the flow guide pipe is arranged in the supersonic incoming flow partition plate. The side surface of the supersonic incoming flow partition plate communicates with the tail end of the supersonic incoming flow partition plate by arranging the flow guidepipe in the supersonic incoming flow partition plate, and pressure difference exists between the two ends of the flow guide pipe, so that jet flow can be formed in the supersonic incoming flow mixingarea by utilizing the flowing characteristics of a flow field without providing an additional gas source; and therefore, mixing enhancing control of the supersonic incoming flow mixing area is realized. The supersonic incoming flow mixing enhancing structure is applied to the field of supersonic incoming flow mixing control.

Description

technical field [0001] The invention relates to the field of supersonic incoming flow mixing control, in particular to a supersonic incoming flow mixing enhanced structure and a rocket-based combined engine. Background technique [0002] As a key process of Rocket Based Combined Cycle (RBCC), ejection plays the role of mixing rocket gas with incoming air. For RBCC, the free flow passes through the intake port and contacts the nozzle gas at the nozzle trailing edge. When the mixture of the two reaches the molecular level, a chemical reaction occurs, and the purpose of using the oxygen in the air to increase the specific impulse of the engine is realized. However, due to the high velocity of the incoming flow, the residence time in the combustion chamber is extremely short (less than 1-3ms), how to realize the rapid and efficient mixing of gas and air is the key issue of injection, that is, to enhance the mixing effect, which determines the entire propulsion system performanc...

AI Technical Summary

Problems solved by technology

[0005] The passive control scheme based on changing the structure of the trailing edge has a simple structure and obvious control effects, but it is mainly aimed at the thin trailing edge mixed layer abstracted from practical problems. For the actual blunt trailing edge mixed layer, the partition is thicker and difficult Changing the structure of the trailing edge, while adopting a pointed trailing edge configuration is not conducive to heat protection

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