| 二维通道内湍流边界层分离的实验研究 |
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| 引用本文： | 尹军飞.二维通道内湍流边界层分离的实验研究[J].实验流体力学,1995(2). |
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| 作者姓名： | 尹军飞 |
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| 作者单位： | 南京航空航天大学 |
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| 摘 要： | 用激光多普勒技术测量了二维扩压器中不可压湍流边界层分离流动，得到了时均速度和雷诺剪应力分布。实验结果分析表明：以Ｃｏｌｅｓ速度律发展的Ｂａｒｄｉｎａ速度分布可以描述瞬时间歇分离点以前和瞬时间歇再附点以后的时均速度分布，但无法描述分离区的边界层速度型。Ｃｒｏｓｓ速度分布可描述分离区的边界层速度分布。Ｃｅｂｅｃｉ＆Ｓｍｉｔｈ涡粘性代数模型难以正确地描述分离边界层的雷诺剪应力。
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| 关 键 词： | 边界层，分离流，激光多普勒测速，湍流，湍流模型 |
EXPERIMENTAL STUDY OF TURBULENT BOUNDARY-LAYER SEPARATION IN A 2-D CHANNEL FLOW |
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| Yin Junfei.EXPERIMENTAL STUDY OF TURBULENT BOUNDARY-LAYER SEPARATION IN A 2-D CHANNEL FLOW[J].Experiments and Measur in Fluid Mechanics,1995(2). |
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| Authors: | Yin Junfei |
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| Institution: | Nanjing Aeronaurics and Astronautics University |
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| Abstract: | An incompressible turbulent boundary layer separation in a two-dimensional diffuser was surveyed using laser doppler velocimeter.Mean and turbulence quantities were obtained and presented.Mean velocity profiles were compared with the several experience relationships. The profiles of eddy viscosity were also compared with the experiment. |
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| Keywords: | boundary layer separating flows Laser Doppler Velocimenter turbulent flows turbulence model |
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