Chemical ignition apparatus and chemical ignition method based on low-temperature fuel

Abstract

The invention relates to a chemical ignition apparatus and a chemical ignition method based on a low temperature fuel. A purpose of the present invention is to solve the problems of easy icing of theigniting agent and igniting failure caused by the blocking of the supply system in the prior art. The apparatus comprises an isolation unit, which comprises an isolation medium filling conduction pipe, a filling conduction pipe inlet valve and a filling conduction pipe outlet valve, wherein both ends of the isolation medium filling conduction pipe are respectively connected to a fuel supply unit and an igniting unit, the isolation medium filling conduction pipe is connected to an isolating medium container loaded with an isolating medium through the filling conduction pipe inlet valve, the freezing point of the isolating medium is smaller than the boiling point of a low-temperature fuel, the boiling point of the isolating medium is greater than the freezing point of an igniting agent, andthe isolation medium filling conduction pipe is connected to a transparent pipe higher than the isolation medium filling conduction pipe through the filling conduction pipe outlet valve. The inventionfurther provides a chemical ignition method based on a low temperature fuel based on the apparatus, wherein an isolating medium is propelled by a low-temperature fuel so as to propel an igniting agent, such that the igniting agent contacts an oxidant and is spontaneously ignited so as to complete ignition.

Description

technical field [0001] The invention relates to an ignition method of a rocket engine, in particular to a chemical ignition device and method based on low-temperature fuel. Background technique [0002] For non-spontaneous two-component rocket engines, chemical ignition is an important ignition method. During the engine starting process, the fuel squeezes the igniter into the combustion assembly to complete the ignition, and realizes the gentle relay between the igniter and the fuel. This ignition scheme is simple and reliable, and it is maturely used in liquid oxygen kerosene engines. [0003] However, for low-temperature propellant engines, since the igniter will freeze when the low-temperature fuel squeezes the igniter, the supply system will be blocked, resulting in ignition failure, so the supply mode of directly using low-temperature fuel to squeeze the igniter is not reliable. Contents of the invention [0004] The invention provides a chemical ignition device and ...

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Problems solved by technology

[0004] The present invention provides a chemical ignition device and method based on low-temperature fuel, aiming to solve the problems existing in the prior art that the igniter is easy to freeze and the supply system is blocked to cause ignition failure

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