超声速混合层混合LES/RANS模拟  

Numerical Simulation of Supersonic Mixing Layers by Hybrid LES/RANs Method

作　　者：晏至辉[1] 刘卫东[1] 范周琴[1] 

机构地区：[1]国防科学技术大学航天与材料工程学院,长沙410073

出　　处：《弹箭与制导学报》2011年第6期141-145,共5页Journal of Projectiles,Rockets,Missiles and Guidance

基　　金：国家自然科学基金(50906098);高等学校博士点新教师专项科研基金(20094307120005)资助

摘　　要：为明确超声速混合层发展规律,利用混合LES/RANS方法计算了隔板厚度、压力不匹配程度及燃料组分对超声速混合层发展的影响,并定量分析了相应的混合效率和压力损失。结果表明:一定范围内,隔板厚度越大,混合越好,总压损失越大;压力不匹配程度与混合效率和压力损失并非线性关系,总体而言,不匹配程度越高,混合效率相对较高,总压损失较小;氢气组分越靠近当量质量分数,混合效率越高,压力损失较大。In order to determine the discipline of the development of the supersonic mixing layer,the hybrid LES/RANS method was applied to simulate the influence of the clapboard thickness,the pressure mismatch degree and fuel components.Besides,the corresponding mixing efficiency and the total-pressure loss were analyzed.The results suggest that within a certain range,the thicker the clapboard is,the higher the mixing efficiency and the total-pressure loss are;the pressure mismatch degree is nonlinear to the mixing efficiency and the total-pressure loss.In general,the higher the pressure mismatch degree is,the higher the mixing efficiency is and the lower the total-pressure loss is;the nearer the hydrogen is to the equivalent mass fraction,the higher the mixing efficiency and the total-pressure loss are.

关 键 词：超声速混合层 混合效率 总压损失 

分 类 号：V435.12[航空宇航科学与技术—航空宇航推进理论与工程]