PIV技术在暂冲式风洞高亚音速平面叶栅流场测量中的应用  

Applications of the PIV( Particle Image Velocimetry) Technology in Measurement of the Flow Field of a High Subsonic Plane Cascade in a Shock Wind Tunnel

作　　者：马昌友[1] 侯敏杰[1] 杨灵[1] 梁俊[1] 

机构地区：[1]中国航空工业集团公司中国燃气涡轮研究院,四川江油621703

出　　处：《热能动力工程》2014年第2期133-138,214-215,共6页Journal of Engineering for Thermal Energy and Power

摘　　要：针对PIV技术在暂冲式风洞高亚音速平面叶栅流场测量中遇到的示踪粒子投放问题,本研究通过采用高压雾化式粒子发生器以及安装在稳压段前的撒播器,有效地使示踪粒子均匀地与主流混合,并成功对某扩压叶栅在设计攻角下的叶栅流道及尾迹速度场进行测量,获得了进口马赫数从0.3至0.73的二维速度矢量场。为了验证PIV试验结果的可靠性,对叶栅流场进行了数值模拟。结果对比表明:采用PIV技术测得的叶栅中截面二维速度矢量场合理地反映了叶片槽道及尾迹的流动结构,与数值模拟结果较为接近;对于跨、超音速或大攻角下叶栅流场,需考虑是示踪粒子壁面污染对测量的影响。本研究提出的PIV测量技术可应用于基于吸附式、合成射流等流动控制技术的高亚音速叶栅流场的测量。In the light of such a problem of the PIV technology encountered in measuring the flow filed of a highly subsonic plane cascade in a shock type wind tunnel as tracer particle placement,by using a high pressure atomization type particle generator and a spreader installed before the pressure stabilizer section,the authors had effectively forced the tracer particles uniformly blended with the main stream and successfully measured the velocity fields in the flow passages and the wake of a diffusion cascade at the design attack angle with two-dimensional velocity vector fields being obtained in a range of Mach number at the inlet from 0. 3 to 0. 73. To verify the reliability of the PIV test results,the flow field of the cascade was numerically simulated. A comparison of the results shows that the two-dimensional velocity vector fields measured in the mid-section of the cascade by using the PIV technology can rationally reflect the flow configuration in the flow passages and the wake of the blades and are relatively close to the numerical simulation results. For the flow fields in a trans-sonic or supersonic cascade at a large attack angle,it is necessary to take account of the influence of the pollution to the wall surfaces caused by the tracer particles on the measurements. On this basis,the PIV technology put forward by the authors can be applied for measurement of the flow fields in a high subsonic cascade based on the absorption type and composite jet flow etc. flow control technologies.

关 键 词：暂冲式风洞 平面叶栅 PIV测量 试验研究 数值模拟 

分 类 号：TK474.811[动力工程及工程热物理—动力机械及工程]