Solid-liquid hybrid engine for ground test experiment

Abstract

The invention provides a solid-liquid hybrid engine for a ground test experiment. Multiple ignition heads are embedded into a front end cover in a dispersed manner and sealed by a one-way rupture disk, when the engine is ignited to start up for the first time, an ignition powder bag is ignited through an igniter, high-temperature high-pressure fuel gas is instantly generated to break through the one-way rupture disk and enters an engine combustion chamber to ignite a grain under the carrying effect of an oxidizing agent, and therefore the engine is ignited to start up. When supply of the oxidizing agent is cut off, the engine is switched off, when the engine needs to start up again, a secondary ignition powder bag is ignited through a secondary igniter, the rupture disk is broken through,at the moment, an oxidizing agent supply valve is switched on again, the high-temperature flue gas flows through the combustion chamber along with the oxidizing agent to ignite the grain again, and the engine is ignited to start up multiple times. The solid-liquid hybrid engine has the function that the engine is ignited to start up multiple times; and the combustion efficiency of the solid-liquidhybrid engine is improved by 18% through an injector, it is not needed to machine the whole engine, the experiment cost is reduced by 30%, and the experiment period is shortened by 1 / 5.

Description

technical field [0001] The invention relates to the field of solid-liquid hybrid engines, in particular to a solid-liquid hybrid engine for ground test vehicles. Background technique [0002] The solid-liquid hybrid engine uses solid fuel and liquid oxidant as propellants, and the fuel and oxidant are stored separately, so it has the advantages of high safety, adjustable thrust, multiple starts, and non-toxic gas. It is a very developed and applied engine. Potential spacecraft power plant. Liu Handai, a graduate student of Beihang University, proposed a solid-liquid hybrid engine for ground test vehicle experiments in his 2005 master's thesis "Design of Standard Experimental Mixed Solid-liquid Rocket Engine". Injector, front end cover, pre-combustion chamber shell, combustion chamber shell and after-combustion chamber shell are integrated, rear end cover, nozzle, and nozzle pressure screw are composed. Engines of different lengths are processed for ground test test. The ef...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the disadvantages of complex structure, low reliability and safety, low combustion efficiency and difficulty in optimization, and the fracture of the nozzle along the root of the step surface in the prior art, the present invention proposes a solid-liquid hybrid engine

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