Nozzleless rocket motor stepped combustion chamber and inner wall thereof

Abstract

The invention provides a nozzleless rocket motor stepped combustion chamber and an inner wall thereof. The inner wall of the nozzleless rocket motor stepped combustion chamber includes a head radial wall surface and an axial wall surface; the head radial wall surface is composed of an initial step wall surface, a transition wall surface and a voltage stabilizing step wall surface, the initial stepwall surface and the voltage stabilizing step wall surface are both plane and perpendicular to the motor axis, and the transition wall surface has a certain slope and connects the initial step wall surface with the voltage stabilizing step wall surface to be a whole; the axial wall surface is connected to the outer edge of the initial step wall surface extends in the axial direction of the combustion chamber; and the axial wall surface and the head radial wall surface together form the combustion chamber.

Description

technical field [0001] The invention relates to an engine combustion chamber technology, in particular to a stepped combustion chamber and an inner wall of a nozzleless engine. Background technique [0002] The nozzleless motor is often used as the initial booster stage of the solid rocket ramjet, and it is a unique solid rocket motor. It uses the gas choking effect to complete the replacement of the mechanical nozzle in the traditional thruster, and has the advantages of simple structure, high reliability, and relatively low cost. [0003] In order to ensure the necessary conditions for maintaining the gas choking effect during the working process of the engine, the length-to-diameter ratio of the design of the nozzleless engine must be relatively large, so the non-uniformity of the combustion surface during its working process is very significant. In addition, because the gas channel changes with the working process due to the combustion surface, the internal flow field o...

AI Technical Summary

Problems solved by technology

However, as time goes by, under the condition that the length-to-diameter ratio is reasonable, the pressure everywhere in the combustion chamber will decrease monotonously, the pressure gradient in the channel will become smaller, and the gas acceleration effect will gradually weaken.

[0004] The main defect of the existing nozzleless engine is that its specific impulse is small

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