Abstract：To investigate the hydrogen/oxygen premixed combustion process in micro-combustor, the numerical mechanism model of the coupled gas-phase reaction kinetic was established， and the numerical simulation was performed by CFD software. The combustion characteristics of micro-combustor with sudden expansion were obtained on the basis of experimental verification. The effects of sudden expansion size and inlet velocity on the combustion process were investigated. The results show that the sudden expansion can improve the mixing effect of hydrogen and oxygen and can make the combustion more complete to increase the fluid temperature in micro-combustor. The residual time of gas mixture in micro-combustor is increased by the increasing of sudden expansion size to obtain high inside temperature even at low inlet flow rate. The conversion rate is decreased with the increasing of inlet flow rate. Micro-combustor with sudden expansion can alleviate the decreasing of hydrogen conversion rate caused by the increasing of inlet velocity.
潘剑锋, 陈琳琳, 卢青波, 刘启胜, 查正乾. 微燃烧室内截面突变对氢氧预混燃烧的影响[J]. 江苏大学学报（自然科学版）, 2017, 38(2): 150-154.
PAN Jian-Feng, CHEN Lin-Lin, LU Qing-Bo, LIU Qi-Sheng, CHA Zheng-Qian. Effects of sudden expansion on H2／O2premixed combustion characteristics in micro-combustor[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2017, 38(2): 150-154.
2017, Vol. 38 
