Design method of three-power combination engine with common sub-combustion chamber

Abstract

The invention discloses a design method for a three-power combined engine sharing a sub-combustion combustion chamber, and relates to a combined engine. The design method is characterized in that a design technology for the three-power combined engine is introduced, wherein a rocket which is in parallel connection to a turbine engine is used to perform turbine-stamping thrust bridging, and the three-power combined engine shares the sub-combustion combustion chamber and is in series-parallel connection. The combined engine forms power hybrid application, and a rocket and turbine parallel-connection runner mode effectively crosses a thrust wide gap, and reduces complexity of the three-power combined system. The combined engine integrates advantages of high specific impulse of the turbine engine, high Mach structure of a ramjet engine and all-speed domain of a rocket engine, and has the advantages of being moderate in technical difficulty, capable of being repeatedly used, and the like. Avalve is selected by only needing one runner, so that the turbine engine and the rocket engine share one set of sub-combustion combustion chamber and a spray tube, and therefore, compared with a conventional three-channel three-power combined engine, the combined engine can reduce one set of sub-combustion combustion chamber and the spray tube, and therefore, the combined engine has the advantages of being simple and reliable in structure.

Description

technical field [0001] The invention relates to a combination engine, in particular to a design method for a three-power combination engine with a turbine and a rocket connected in parallel and sharing a subcombustion combustion chamber. Background technique [0002] Hypersonic flight is considered to be the third revolution after propellers and jet propulsion. All major military powers in the world, led by the United States, attach great importance to the research of hypersonic aircraft technology. At present, the frontier hotspots of academic research on aerospace vehicles are shifting from the development of scramjet engines to the research of combined power systems capable of horizontal take-off and acceleration to hypersonic speeds, among which the development of turbine-based combined cycle engines is the focus . Turbine-based combined cycle engine (TBCC) refers to a power plant composed of a turbine engine and other types of engines. It is one of the key power system...

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