某支板式超音速剪切流燃烧的数值研究  

NUMERICAL STUDY ON A STRUT SUPERSONIC SHEAR FLOW AND COMBUSTION

作　　者：侯凌云[1] 王人杰[1] 

机构地区：[1]清华大学航天航空学院,北京100084

出　　处：《工程热物理学报》2007年第4期714-716,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.50306011)

摘　　要：针对某支板火焰稳定结构数值研究了二维超音速流动和燃烧规律,提出不同燃料供给方案,比较了采用全氢气、全甲烷和不同比例的混合燃气等情况下的燃烧性能。结果表明:单一燃料时,氢气超燃性能很好,但会出现热量雍塞,而甲烷无法燃烧,两种混合燃料方案均在燃烧室内出现了稳定的火焰,但氧气消耗率不理想,基于上述结论给出了一些提高超燃性能的改进措施．Supersonic flow and combustion in the flame-hold design of strut are investigated numerically. Different fuel-supply schemes are proposed. The comparisons among hydrogen., methane and hybrid fuel for various ratios are conducted. The results show that hydrogen has a good supersonic combustion performance, but heat jammed phenomenon occurrs for the current strut structure. Methane shows the opposite effects, which no combustion is observed, Stable flame is obtained in the combustor when hybrid fuel of methane/hydrogen is injected, but the burn-out mass fraction of oxygen is poor. So some improved suggestions are concluded to enhance the combustion in a supersonic flow.

关 键 词：支板 剪切流 超音速燃烧 

分 类 号：TK16[动力工程及工程热物理—热能工程]