| EXPERIMENTAL INVESTIGATION FOR THE EFFECT OF ROTATION ON THREE-DIMENSIONAL FLOW FIELD IN FILM-COOLED TURBINE |
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| 作者姓名： | YUAN Feng ZHU Xiaocheng DU Zhaohui School of Mechanical Engineering Shanghai Jiaotong University Shanghai China |
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| 作者单位： | YUAN Feng ZHU Xiaocheng DU Zhaohui School of Mechanical Engineering，Shanghai Jiaotong University，Shanghai 200030，China |
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| 摘 要： | An experimental investigation of three-dimensional flow field in a film-cooled turbine model is carried out by using particle image velocimeter (PIV) in a low-speed wind tunnel. The effects of different blowing ratios (M=1.5, 2) on the flow field are studied. The experimental results reveal the classical phenomena of the formation of kidney vortex pair and secondary flow in wake region behind the jet hole. And the changes of the kidney vortex pair and the wake at different locations away from the hole on the suction and pressure sides are also studied. Compared with the flow field in stationary cascade, there are centrifugal force and Coriolis force existing in the flow field of rotating turbine, and these forces bring the radial velocity in the jet flow. The effect of rotation on the flow field of the pressure side is more distinct than that on the suction side from the measured flow fields in Y-Z plane and radial velocity contours. The increase of blowing ratio makes the kidney vortex pair and the secondary flow in the wake region stronger and makes the range of the wake region enlarged.
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| 关 键 词： | 涡轮 三维流场 旋转作用 喷射 流体力学 |
EXPERIMENTAL INVESTIGATION FOR THE EFFECT OF ROTATION ON THREE-DIMENSIONAL FLOW FIELD IN FILM-COOLED TURBINE |
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| YUAN Feng ZHU Xiaocheng DU Zhaohui School of Mechanical Engineering,Shanghai Jiaotong University,Shanghai ,China.EXPERIMENTAL INVESTIGATION FOR THE EFFECT OF ROTATION ON THREE-DIMENSIONAL FLOW FIELD IN FILM-COOLED TURBINE[J].Chinese Journal of Mechanical Engineering,2007,20(1):10-15. |
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| Authors: | YUAN Feng ZHU Xiaocheng DU Zhaohui |
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| Affiliation: | School of Mechanical Engineering,Shanghai Jiaotong University, Shanghai 200030, China |
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| Abstract: | An experimental investigation of three-dimensional flow field in a film-cooled turbine model is carried out by using particle image velocimeter (PIV) in a low-speed wind tunnel. The effects of different blowing ratios (M=1.5, 2) on the flow field are studied. The experimental results reveal the classical phenomena of the formation of kidney vortex pair and secondary flow in wake region behind the jet hole. And the changes of the kidney vortex pair and the wake at different locations away from the hole on the suction and pressure sides are also studied. Compared with the flow field in stationary cascade, there are centrifugal force and Coriolis force existing in the flow field of rotating turbine, and these forces bring the radial velocity in the jet flow. The effect of rotation on the flow field of the pressure side is more distinct than that on the suction side from the measured flow fields in Y-Z plane and radial velocity contours. The increase of blowing ratio makes the kidney vortex pair and the secondary flow in the wake region stronger and makes the range of the wake region enlarged. |
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| Keywords: | Film-cooled turbine rotor PIV measurement Blowing ratio Three-dimensional flow field TURBINE FLOW FIELD ROTATION EFFECT INVESTIGATION increase blowing ratio range effect rotation side flow fields plane contours forces radial velocity jet flow centrifugal force Coriolis force stationary |
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