Numerical Study of the Combustion Field in Dual-cavity Scramjet Combustor
As one of the most effective structures of flame stabilizer,cavity owns an important position in scramjet combustor research,especially the tandem dual-cavity,which has a remarkable advantage in promoting fuel air mixing and flame stability.In this paper,flow field characters of dual-cavity scramjet combustor were analyzed in details without and with combustion.The results show that,under the interaction of cavity flow and fuel injection,two sizes of vortexes were formed in the upstream cavity after combustion.The bigger vortex provides a stable flame and the smaller one protects the upstream cavity back wall from heat in a certain extent.Additionally,the unburned fuel was blew away to the downstream cavity for a further combustion as soon as it meets high-speed main stream,which is helpful to improve combustion efficiency and to make the scramjet combustor shorter.And the mass of kerosene drifted into cavities was determined by fuel-jet velocity,which would have an indirect effect on the combustion efficiency.
scramjet combustor tandem dual-cavity numerical simulation
Wang Lu Qian Zhansen Gao Liangjie
AVIC Aerodynamics Research Institute,Shenyang110034,China;Aviation Key Laboratory of Science and Technology on High Speed and High Reynolds Number Aerodynamic Force ResearchShenyang110034,China
国际会议
2014 Asia-Pacific International Symposium on Aerospace Technology(2014亚太航空航天技术学术会议)
上海
英文
1-7
2014-09-24（万方平台首次上网日期，不代表论文的发表时间）