关键词: 液体推进剂火箭发动机;空腔谐振器;点火;点火装置

Abstract: In order to reliably realize the multiple ignition of liquid rocket engine, the gas dynamic resonance ignitor, which creates the ignition resource of high temperature and high energy, was applied to ignite kerosene/oxygen. Two ignitors were developed. The helium resonance ignitor with light and simple structure was powerful and reliable. It can be concluded from experiments that the helium resonance ignitor has good resonance performance even when gas temperature or inlet pressure has large variance, which leads to more application of helium resonance ignitor. The kerosene/oxygen ignitor, which is utilized as an indirect ignition method, is able to multiple ignition and produce ignition torch successfully. Since the flux of kerosene and oxygen and the temperature of ignition torch can be varied in a wide range, the kerosene/oxygen ignitor satisfies various ignition requirements of liquid rocket engines. The present research shows that the helium resonance ignitor and the kerosene/oxygen ignitor characterized with advantages of simple structure, high reliability, and non-poison, etc., are prospective to be applied for multiple ignition of liquid rocket engine.

Key words: Liquid propellant rocket engine;Cavity resonator;Ignition;Ignition device