支板-凹腔组合结构对煤油混合的数值分析  

Numerical Study on the Mixture of Kerosene Using Strut-cavity Structure

作　　者：王宏宇[1] 高峰[1] 王应洋 

机构地区：[1]空军工程大学防空反导学院,西安710051

出　　处：《弹箭与制导学报》2015年第3期99-102,共4页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：为研究超声速燃烧室的混合特性,采用离散相模型对带有支板-凹腔组合结构的煤油超燃冲压发动机燃烧室进行了数值模拟,分析了凹腔长深比和凹腔后缘倾角变化对煤油混合特性的影响。计算结果表明,大长深比的凹腔构型增大了燃料的穿透深度,拓宽了煤油与空气的接触面积,从而使混合效率增加。后缘倾角为30°的凹腔较后缘倾角为45°的凹腔更容易卷吸主流中的燃料,增加燃料与凹腔内气体的质量交换。Numerical simulation with discrete phase model was made on supersonic combustor with a strut-cavity structure to study the mix- ture characteristics of the supersonic combustor. The effect of the cavity＇ s length to depth ratio （L/D） and the aft angle on the kerosene mixture characteristics was analyzed. The results show that the structure with big L/D contributes to the mixture of the fuel and air with higher mixture efficiency; the cavity with 30° aft angle involves more fuel than that with 45° aft angle, increasing the mass exchange be- tween the fuel and the air in the cavity.

关 键 词：超声速燃烧室 支板-凹腔火焰稳定器 混合效率 数值模拟 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]