【摘 要】
：
为了深入了解旋转涡轮叶片内冷通道中的紊流特性,并为CFD研究提供实验数据,用激光多普勒测速仪(LDA)测量了旋转U型通道中分离流的雷诺应力分量.通道的转轴与弯道的曲率轴平行
【机 构】
：
南京航空航天大学能源与动力学院,Mechanical
论文部分内容阅读
为了深入了解旋转涡轮叶片内冷通道中的紊流特性,并为CFD研究提供实验数据,用激光多普勒测速仪(LDA)测量了旋转U型通道中分离流的雷诺应力分量.通道的转轴与弯道的曲率轴平行,测量是在与转轴垂直的对称平面中进行的,流动状态为Re=100,000,Ro=0,0.2和-0.2.直接测量的分量为u2x,u2z和uxuz,结果表明旋转对紊流分布的形式有很强的影响.在测量的三种旋转状态中Ro=0.2的正转和Ro=0.2的负转分别具有最低和最高的紊流强度.根据测量到的信息估算了雷诺应力uiuj的产生率,结果显示负转的产生率比正转时高.
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