支板构型对煤油/空气混合影响数值分析  

Numerical Analysis of the Influence of Strut Configuration on the Mixture of Kerosene/Air

作　　者：夏雪峰[1] 高峰[1] 王宏宇[1] 张涵[1] 

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》2016年第6期83-87,共5页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：为研究支板尾部结构对煤油/空气混合特性的影响,采用离散相模型对五种支板-凹腔构型的超燃燃烧室进行数值仿真,得到了对应煤油分布、涡结构和总压损失情况。结果表明,交错斜坡支板和交错楔形支板均能提高煤油组分混合效率,但也带来较大的阻力和总压损失;楔形块数少的支板更容易产生尺度大且能量大的流向涡,可有效扩展可燃混合区范围;楔形块数多的支板有利于促进近场的小尺度混合,但在远场的大尺度混合不占优势。Numerical simulation with discrete phase model was made on scramjet combustor of five strut-cavity structures to study the influence of strut tail structure on the mixture characteristics of kerosene/air.The impacts to mixing performance,vortex structures and total pressure recoveries were obtained.Results showed that staggered slope plates and staggered wedge plates could improve the mixing efficiency of kerosene component,but it also brought greater resistance and total pressure loss.The wedge-shaped block with a small number of blocks was more prone to large-scale and large-energy streamwise vortex,which can effectively extend the combustible mixed zone.The wedge-shaped block with a large number of blocks was more conducive to the small scale mixing in the near field,but was not dominant in large scale mixing in the far field.

关 键 词：超燃燃烧室 支板构型 混合效率 数值分析 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]