超燃冲压发动机燃烧室燃料喷注及其内流场的数值模拟  

Numerical Simulation for the Fuel Jet and Inner Flowfield of Scramjet Combustion Chamber

作　　者：周松柏[1] 刘君[1] 郭正[1] 王巍[1] 耿辉[1] 

机构地区：[1]国防科技大学航天与材料工程学院,湖南长沙410073

出　　处：《国防科技大学学报》2007年第2期24-28,共5页Journal of National University of Defense Technology

基　　金：国家部委基金资助项目

摘　　要：基于三维N-S方程,利用有限差分数值离散方法,对考虑了燃料喷注和凹腔结构综合影响的某超燃冲压发动机燃烧室模型的内流场进行了数值模拟,与实验流动图谱进行了定性比较,并进一步探讨了燃料喷注过程的非定常特性以及凹腔结构对流动的影响。研究表明:本文数值模拟的稳态时刻流场与实验流动图谱相似;数值结果捕捉到了横向喷注燃料沿下游运动并向凹腔扩散的非定常动态变化的规律。The inner flow field of scramjet combustion chamber with fuel jet and cavity structure was simulated numerically on the basis of the 3-D Navier-Stokes equations. Finite differential method was used. With a comparison between the numerical and experimental results, the unsteadiness of fuel jet and influence of cavity structure on the flow field were discussed. From the results, it is observed that the stable flow field of numerical simulation is similar to experimentation, and the unsteady dynamic phenomenon that fuel jet moves downstream and diffuses into the cavity is captured from simulation.

关 键 词：超燃冲压发动机 横向射流 凹腔 数值模拟 平面激光诱导荧光 

分 类 号：V235.211[航空宇航科学与技术—航空宇航推进理论与工程]