应用PDA测量气固两相流边界层时壁面的选择  

Selection of Wall for Measuring Boundary Layer of Gas-solid Two Phrase Flow with PDA

作　　者：张金成[1] 姚强[1] 孙俊民[1] 

机构地区：[1]清华大学

出　　处：《流体工程》2001年第8期11-13,共3页

基　　金：国家自然科学基金资助项目 ( 2 9976 0 2 2 )

摘　　要：应用激光技术测量边界层流场时需要选择合适的壁面 ,以解决壁面反射光过强和零点确定问题。通过试验 ,研究激光三维粒子动态分析仪测量湍流边界层时如何选择壁面的问题。试验结果表明 ,选择背面涂黑的玻璃壁面 ,能够很好地解决这两个问题 ,并且使测量达到一定的精度要求。Two questions will be met by the technique of laser Doppler velocity measurement of flow field in boundary layer. The reflected light from the wall is too strong and the origin coordinate cannot be determined. How to select suitable wall to measure the turbulent flow boundary with PDA has been discussed in this paper. It is showed by the experiment results that selecting glass plate with one side blackened by paint can solve these two problems perfectly.

关 键 词：PDA 湍流边界层 两相流 壁面 激光三维粒子动态分析仪 

分 类 号：O359[理学—流体力学] O357.4[理学—力学]