Ramjet engine

Abstract

The invention provides a ramjet engine which comprises a combustion chamber. The expansion angle of the inner wall of the combustion chamber is gradually increased from the inlet end to the outlet ofthe combustion chamber. When the ramjet engine is started, fuel and oxidizing agent are supplemented for the combustion chamber according to the certain ratio and flow through a fuel supplementing device and an oxidizing agent supplementing device which are arranged on the inner wall of the combustion chamber, and therefore the fuel and the oxidizing agent are combusted in the combustion chamber to achieve thrust needed by the ramjet engine. Based on the ramjet engine, according to the requirements of an aircraft for thrust and specific impulse of the engine, the expansion angles of differentsections in the combustion chamber of the ramjet engine and fuel and oxidizing agent supplementing positions are reasonably set, the oxidizing agent and the fuel are supplemented according to the certain flow and ratio, the supplemented fuel in the combustion chamber is combusted while being mixed to evenly release energy, the high specific impulse and large thrust are achieved, and the working performance of the engine in a wide mach number range is optimal.

Description

technical field [0001] The invention relates to the field of engines, in particular to a ramjet engine. Background technique [0002] The ramjet is one of the ideal powers for near-Earth space flight. The specific impulse of a ramjet is much higher than that of a rocket at flight Mach numbers between 4 and 7. Because the super ramjet engine uses the air passage to compress the air to obtain the oxidant, so the super ramjet engine does not need to carry a large amount of oxidant, and the application on the aircraft reduces the weight of the aircraft and increases the specific impulse of the fuel. Moreover, the detachment ramjet engine is only composed of an intake port, a combustion chamber, and an exhaust nozzle, and does not require rotating parts such as a compressor and a turbine. It has a simple structure, low cost, and easy maintenance. In addition, it can also be applied to hypersonic cruise missiles, hypersonic aircraft and aerospace aircraft, etc., which have impor...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a ramjet, which solves the problem of insufficient thrust of the simple ramjet and the RBCC ramjet in the prior art

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