基于PIV测试的径向入流旋转盘腔流动特性研究  

Study on Flow Characteristics of Radial Inflow Rotating Disk Cavity Based on PIV Test

作　　者：孙肇林 魏嵩 严佳玺 SUN Zhaolin;WEI Song;YAN Jiaxi(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《机械制造与自动化》2024年第6期62-67,112,共7页Machine Building & Automation

摘　　要：将PIV技术应用于压气机径向入流的简单盘腔中,使用实验研究旋转雷诺数和流量系数对于盘腔内部旋流数以及流场的影响,得到入口旋流数C in随罗斯比数R o变化以及非线性修正系数K i随湍流参数λ变化的拟合公式;提出OWEN等人模型的修正方法,使其可以更好地应用于工程。研究发现:旋转雷诺数的增大会导致旋流数变化趋势减慢,使得整个流场实现更稳定的分层;流量系数的增大会导致旋流数变化趋势增快,同时会使流场中的粒子以更为规则的方式沿转盘旋转方向运动。By applying PIV technology to a simple disk cavity with radial inflow,studies the influence of rotating Reynolds number and flow coefficient on the swirl number and flow field in the disk cavity,obtaining the fitting formula of the inlet swirl number C in with R o and the nonlinear correction coefficient K i.Thus an method for modifying the nonlinear model is proposed for better application in engineering.It is found that the increase of the rotating Reynolds number will lead to the decrease of the cyclone number,making the entire flow field achieve more stable stratification.And the increase of the flow coefficient will result in the increase of the cyclone number,and meanwhile make the particles in the flow field move in a more regular way along the rotation direction of the rotating disk.

关 键 词：压气机 粒子图像测速 旋转盘腔 旋流数 

分 类 号：TH138[机械工程—机械制造及自动化]