Engine combined of pulse detonation ejection and supersonic combustion ramjet

Abstract

The invention provides an engine combined of pulse detonation ejection and supersonic combustion ramjet, and the engine is mainly composed of the components of a pulse detonation burner, an ejector and the like. The ejector comprises an ejector inlet valve, a mixing isolation segment, a secondary burning chamber and ejector spray pipes. The engine combined of the pulse detonation ejection and thesupersonic combustion ramjet comprises two working modes of a pulse detonation ejection mode and a supersonic combustion ramjet mode. When the flight mach (Ma) number is equal to 0-5, the engine worksin the pulse detonation ejection mode, under the ejecting action of a combustion ejection flow jetted from the detonation burner, more air is ejected into an air inlet passage, the total air pressurerises, the combustion ejection flow is mixed with the ejected air, fuel is jetted to the mixed air flow, secondary detonation is performed, and at this time, the thrust of the engine is mainly provided by the pulse detonation burner and a secondary pulse detonation system; and when the Ma is larger that 5, the engine is switched from the pulse detonation ejection mode to the supersonic combustionramjet mode, and an aircraft continues to accelerate under the push of the supersonic combustion ramjet engine.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a pulse detonation injection scramjet combination engine. Background technique [0002] Pulse detonation engine (PDE) is a self-pressurized (about 13-15 times) power device that uses high-temperature and high-pressure gas generated by pulse detonation waves to generate thrust, and can operate in a very wide flight Mach number range ( Ma=0~5), and can work efficiently at subsonic speed and supersonic speed. In addition, the detonation combustion mode has the remarkable advantages of high thermal efficiency (49%) and fast combustion rate (2000m / s). The PDE with this technology has a high heat capacity, which enables the power plant to obtain greater unit thrust and lower fuel consumption. [0003] The scramjet engine (Scramjet) can work in the range of Ma=5-15 or even higher, extending the flight altitude to the edge of the atmosphere (50-60km). Although the scramjet engine is s...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the lack of high Mach number flight performance of the pulse detonation engine and the inability of the scramjet to start by itself, the present invention proposes a pulse detonation ejection scramjet combined engine, which can operate in the range of Mach 0 to 15 Internal work to realize the conversion between pulse detonation mode and scram stamping mode

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