Influence of Streamwise Vortex on Turbulence Characteristics of Endwall Flow in a Compressor Cascade
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摘要: 为了弄清扩压叶栅端壁角区旋涡对湍流特性分布的影响,用三维激光多普勒测速技术测量了平面扩压叶栅中角区流动的湍流特性.对测量结果的分析表明:流向涡的核心区域及旋涡与附面层相互作用区域的湍流动能增加.同时,旋涡和旋涡运动强烈影响着雷诺正应力和切应力的分布规律.Abstract: To understand the influence of streamwise vortex on turbulence characteristics, the turbulence characteristics of flow in the corner region of a compressor cascade passage were measured by using a three-dimensional Laser Doppler Velocimetry system. The result indicated that the turbulence kinetic has a maxima in the core regions of the streamwise vortex and regions that interacted between the vortex and boundary layer, and the vortex or motion of the vortex has strong influence on the distributions of the Reynolds normal stress and shear stress.
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Key words:
- cascade flow /
- vortex flow /
- turbulence characteristics
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[1]Deton J D. Loss mechanisms in turbomachines[J]. J of Turbomachinery, 1993,115:621~656. [2]Langston L S, Nice M L, Hooper R M. Three dimensional flow within a turbine cascade passage[J]. J of Engineering for Power, 1977,99:21~28. [3]Gregory-Smith D G. Secondary flow and losses in axial flow turbines . J of Engineering for Power, 1982,104:819~822. [4]Moore J, Ransmayr A. Flow in a turbine cascade:Part 1. Losses and leading-edge effects[J]. ASME J Eng Gas Turbine, 1984,106:400~408. [5]Shakaba I M, Bradshaw P. Turbulent flow measurement in an idealized wing-body junction[J]. AIAA J,1981,19:131~132. [6]Teruel M F N. An experimental and computational study of flow in the endwall region of a turbine cascade passage . California:Dept of Mechanical Engineering of Stanford University,1995. [7]Tang Y P, Chen F, Chen M Z. Experimental investigation of vortex structure in corner region of a linear compressor cascade . ASME,91-GT-158, 1991. [8]蒋浩康,马宏伟. 压气机转子三维紊流流场[J]. 工程热物理学报,1998,19(2):287~292． [9]刘火星,陈矛章,蒋浩康. 扩压叶栅端壁角区流动结构和湍流特性[J]. 工程热物理学报,1999,20(3):290~293． -
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