| The Tip Leakage Flow Structure of an Axial Fan with Tip Clearance |
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| 作者姓名： | 竺晓程 杜朝辉 林万来 |
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| 作者单位： | [1]TurbomachineryLab.,ShanghaiJiaotongUniv.,Shanghai200030,China [2]EmersonElectricCorporation,10048IndustrialBlvd.Lenexa,KS66215,USA |
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| 基金项目： | National Natural Science Foundation of
China( No.5 0 1760 3 0 7) |
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| 摘 要： | Experiment and numerical simulation technique are used to investigate the tip leakage flow in an axial fan with tip clearance at the design condition. The flow field in the tip region of fan is measured using a PDA (Particle Dynamics Analysis) system. The flow is surveyed across the whole passage at fifteen axial locations (from the 100% axial chord in front of the leading edge to the 100% axial chord behind the trailing edge), mainly focusing on the outer 90% blade span. Both experiment measurement and numerical simulation indicates the leakage flow orig-inated from the tip clearance along the chord rolls-up into three-dimensional spiral structure to form leakage flow vortex. The interaction of leakage flow and main flow will produce the low velocity zone, and block the flow. The leakage flow almost occupies the most part of flow passage behind the trailing edge.
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| 关 键 词： | 粒子动力学分析 PDA 轴流式风机 齿顶间隙 渗流 涡流 |
The Tip Leakage Flow Structure of an Axial Fan with Tip Clearance |
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| ZHU Xiao cheng ,DU Zhao hui ,LIN Wan lai.The Tip Leakage Flow Structure of an Axial Fan with Tip Clearance[J].Journal of Shanghai Jiaotong university,2003,8(1):75-79. |
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| Authors: | ZHU Xiao cheng DU Zhao hui LIN Wan lai |
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| Institution: | 1. Turbomachinery Lab. , Shanghai Jiaotong Univ. , Shanghai 200030, China
2. Emerson Electric Corporation, 10048 Industrial Blvd. Lenexa, KS 66215, USA |
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| Abstract: | Experiment and numerical simulation technique are used to investigate the tip leakage flow in an axial fan with tip clearance at the design condition. The flow field in the tip region of fan is measured using a PDA (Particle Dynamics Analysis) system. The flow is surveyed across the whole passage at fifteen axial locations (from the 100% axial chord in front of the leading edge to the 100% axial chord behind the trailing edge), mainly focusing on the outer 90% blade span. Both experiment measurement and numerical simulation indicates the leakage flow originated from the tip clearance along the chord rolls up into three dimensional spiral structure to form leakage flow vortex. The interaction of leakage flow and main flow will produce the low velocity zone, and block the flow. The leakage flow almost occupies the most part of flow passage behind the trailing edge. |
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| Keywords: | particle dynamics analysis (PDA) tip clearance flow tip clearance vortex |
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