实验流体力学2018，Vol.32Issue(2)：24-27,4.DOI:10.11729/syltlx20180003
乙烯高速射流点火过程试验研究
Experimental study on ignition process for ethylene high speed jet
摘要
Abstract
In order to investigate the ignition process with fuel-rich gas of scramjet combustor,a simplified burner with fuel-rich hot coflow and sonic nozzle jet was designed.Ignition process of sonic ethylene jet issuing into a coflow of hot exhaust products of a rich premixed ethylene/air flat flame was examined using the chemiluminescence.Three cases with the equivalence ratio of coflow varying from 1.4 to 1.6 and the injection pressure varying from 2atm to 3atm were examined.The results indicate that:(1) the ignition process of sonic ethylene jet in fuel-rich gas may be divided into four steps:(a) jet and coflow mixing;(b) strong chemical reactions between jet and surrounding air;(c) occurrence of extinction in the downstream of flame;(d) steady flame;(2) the equivalence ratio of coflow 1.4 was more effective than 1.6 for ignition process;(3) with the increase of jet velocity,flame luminosity is lowered due to incomplete burning in the higher speed steady flame.关键词
超燃冲压发动机/乙烯/高速射流火焰/点火过程/高速摄像机Key words
scramjet combustor/ethylene/high speed jet/ignition process/high speed camera分类
航空航天引用本文复制引用
刘冰,何国强,秦飞..乙烯高速射流点火过程试验研究[J].实验流体力学,2018,32(2):24-27,4.基金项目
国家自然科学基金(91541110) （91541110）
