二维缩比发动机实验器中旋涡运动的实验研究  

Experimental investigation of vortical motions in a 2D scaled experimental motor

作　　者：陈晓龙[1] 何国强[1] 刘佩进[1] 肖波[1] 岳赟[1] 

机构地区：[1]西北工业大学燃烧流动和热结构国家重点实验室,陕西西安710072

出　　处：《实验流体力学》2011年第1期37-41,共5页Journal of Experiments in Fluid Mechanics

基　　金：国家自然科学基金资助项目(10602047)

摘　　要：针对固体火箭发动机的二维缩比实验器,搭建了高速摄影平台,利用示踪粒子的散射作用,采用连续片光流动显示技术,对流场中的旋涡运动进行了实验研究。实验结果表明:后向台阶处存在明显的流动分离,产生了旋涡。旋涡有规律地脱落,并在随主流向下游传播的过程中尺度逐渐变大;大多数脱落的旋涡撞击潜入式喷管潜入段发生破碎,其中一部分直接流出喷管,而另一部分进入潜入式喷管背区空腔内;少数脱落的旋涡由于大尺度旋涡运动的卷吸作用直接进入潜入式喷管背区空腔,而没有与潜入式喷管潜入段发生碰撞,研究结果可以提高对真实固体火箭发动机中流场的认识,并为数值计算方法提供实验验证。The detail motions of vortices in a 2D scaled motor of SRM were studied by high speed visualization in this paper.The experimental data indicate that the flow start to separate right after the backward-facing step,which gives birth to periodically-shedding vortices.The scale of vortex increases with their convection downstream along the mean flow.Vortex breaks down due to its impingement on the submerged nozzle head,part of which exits in the motor directly through the nozzle throat while the other part flows into the cavity formed by submerged nozzle.Few of the vortices flow directly into the submerged nozzle cavity without impinging on the submerged nozzle head.The results obtained in this paper could improve the understanding of the flow in SRM and provide experimental validation for numerical simulation.

关 键 词：固体火箭发动机 内流场 旋涡 高速摄影 实验研究 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]