A new ignition system and ignition method for multiple ignition of liquid ramjet

Abstract

The invention discloses a novel ignition system, so as to solve the defect that the existing ignition system needs to be equipped with two sets of propellant supply containers and pipelines, and the system is thus complicated. The novel ignition system comprises a pressurization system, an ignition agent storage box, a supply system and an injector connected in sequence, wherein the pressurization system comprises a first vacuum pumping pipeline and a pressurization pipeline parallelly arranged on the ignition agent storage box; the ignition agent storage box is used for storing an ignition agent, and the storage box is internally provided with a vacuum environment; the supply system comprises a supply pipeline, and a manual isolation valve, a first blow off pipeline, a second blow off pipeline, a pneumatic isolation valve, a manual shutoff valve, a pneumatic shutoff valve and a third blow off pipeline arranged on the supply pipeline sequentially; one end, close to the manual isolation valve, of the supply pipeline is an input end, and the supply pipeline is connected with the ignition agent storage box via the manual isolation valve; and a squeezing medium is supplied from the pressurization pipeline, the ignition agent in the ignition agent storage box is squeezed to the supply system and then enters the injector from the output end of the supply system, and the ignition agent is then injected out of the injector for realizing ignition.

Description

technical field [0001] The invention belongs to the field of engine direct connection test, in particular to an ignition system for engine ground test. Background technique [0002] As an important part of future aircraft, ramjet has the characteristics of light weight, high specific impulse, high speed and reusability. In the development test of a new type of ramjet engine, multiple starts are required for a single test. The ignition system that meets the requirements of multiple ignitions in the existing ground test is mainly the torch ignition system. The system principle is as follows: figure 1 shown. The torch ignition system adopts the gas-oxygen / kerosene organization combustion, and the high-voltage direct current excites the spark plug to ignite the mixed gas. The system needs to be equipped with two sets of propellant supply containers and pipelines, and also needs to be equipped with booster rectification devices such as high-pressure packs. The system is complic...

AI Technical Summary

Problems solved by technology

The system needs to be equipped with two sets of propellant supply containers and pipelines, and also needs to be equipped with booster rectification devices such as high-pressure packs. The system is complicated, and the operation and maintenance are poor.

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