不同主流速度下障碍涡脱落冷流实验研究  

Cold flow experimental research of obstacle vortex-shedding with mean flow velocities

作　　者：甘晓松[1] 何国强[1] 杨尚荣[1] 岳赟[1] 

机构地区：[1]西北工业大学燃烧热结构与内流场重点实验室,西安710072

出　　处：《固体火箭技术》2011年第4期426-430,共5页Journal of Solid Rocket Technology

摘　　要：采用冷流试验系统研究了不同主流速度对压强振荡的影响,并通过在流场中加入示踪粒子,且运用连续片光流动显示技术和高速数字摄像技术获得了试验器中流场的旋涡运动情况。实验结果表明,随着主流速度的增加,旋涡脱落的频率相应升高。同时,对比压强测试结果与高速摄影结果,发现当旋涡脱落的频率接近实验器声场的某一阶固有频率时,就可能引起压强振荡,且两者频率的差值越小,压强振荡的振幅就越大。A cold flow experimental system was built to study the influence of mean flow velocities on pressure oscillation.By putting trace particles into the flow field,its vortex movement in tester was obtained with continuous laser sheet displaying of flow and high speed digital camera.The results show that vortex shedding frequency rises with the increasing of mean flow velocity.By comparing the pressure oscillation data and the high speed visualization image sequence,it can be concluded that when the vortex shedding frequency is close to the frequency of one of resonant acoustic modes of the experimental facility,pressure oscillation occurs.The closer the two frequencies are,the higher the amplitude is.

关 键 词：声涡耦合 障碍涡脱落 冷流实验 

分 类 号：R448.15[医药卫生—诊断学]