无动量亏损尾迹的实验研究  

Experimental investigation on the momentumless wake

作　　者：吴亚东[1] 竺晓程[1] 杜朝辉[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200030

出　　处：《实验流体力学》2007年第3期30-34,共5页Journal of Experiments in Fluid Mechanics

基　　金：国家自然科学基金资助项目(50406017)

摘　　要：采用尾缘吹气的流动控制技术,改善静子尾迹区流动。使用热线风速仪对静子尾迹区在不同吹气量下的轴向速度进行了测量,得到了在纯尾迹、弱尾迹、无动量亏损尾迹和射流这4种工况下尾迹区的轴向速度分布、中心点速度频谱图以及尾迹特征长度沿流动方向的变化。实验测量结果表明,无动量亏损尾迹和纯尾迹工况相比改善了静子出口速度的均匀性,并改变了涡脱落特性。无动量亏损尾迹特征长度与x0.35成正比关系,而纯尾迹时的特征长度沿轴向与x0.37成正比关系变化。Trailing edge blowing wake management technology was adopted to improve the flow of stator wake. The flow parameters of stator wake were measured by hot wire anemometers （HWA） under different mass injection. Axial velocity profile, spectrum of velocity fluctuating and development rule of the wake width were obtained for pure wake, weak wake, momentumless wake and jet. According to the experimental results, injection up to momentumless wake can eliminate the vortex shedding frequency of the stator, and make the outlet velocity profile of the stator smooth. Meanwhile, the wake characteristic length scale of momentumless wake is in direct proportion to x^0.35, while pure wake is in direct proportion to x^0.37.

关 键 词：静子 无动量亏损尾迹 尾缘吹气 热线风速仪 尾迹控制 

分 类 号：O357.54[理学—流体力学] TH824[理学—力学]