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Measurement on flow field at inlet and outlet of axial-flow pump impeller |
Zhang Desheng,Shi Weidong,Guan Xingfan,Cao Weidong,Leng Hongfei |
(Technical and Research Center of Fluid Machinery Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China) |
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Abstract In order to obtain the flow structure in high efficiency axial-flow pump impeller,the measurement device was designed.Five-hole spherical probe was used to measure the velocity at inlet and outlet of axial-flow impeller at the conditions of 0.8Qopt,1.0Qopt and 1.2Qopt.The distributions of velocity vector,static pressure and total pressure were measured.Meridional velocity,circulation and velocity in circumferential direction were analyzed.Measurement results show that the flow in axial-flow pump inlet is steady at the conditions of 0.8Qopt~1.2Qopt,axial velocity decreases gradually from hub to tip,the prerotation is very small,and the static pressure distribution is almost uniform in radial direction at design condition.At optimal condition,there is an almost consistent circulation flow pattern at the outlet of axial-flow impeller without hub leakage.Meridional velocity,circulation,pressure and efficiency all decrease near hub clearance if hub leakage exists.The measured data provides the basis for the further research on flow characters of high-efficiency axial-flow pump.
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Received: 02 May 2009
Published: 30 July 2009
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[1]关醒凡.新系列轴流泵模型试验研究成果报告[J].排灌机械,2005,23(4):1-5.Guan Xingfan.Test reports of a new series of axial-flow model pumps[J].Drainage and Irrigation Machinery,2005,23(4):1-5.(in Chinese)[2]Sitaram N,Lakshminarayana B,Ravindranath A.Conventional probes for the relative flow measurement in a rotor blade passage[J].ASME Journal of Engineering for Power,1981,103:406-414.[3]Farrell K J.An Investigation of End-Wall Vortex Cavita-tion in a High Reynolds Number Axial-Flow Pump[D].United States:Department of Mechanical Engineering,the Pennsylvania State University,1989.[4]Alpan K,Peng W W.Suction reverse flow in an axial-flow pump[J].Journal of Fluids Engineering,1991,113:90-97.[5]Zierke W C,Farrell K J,Straka W A.Measurements of the tip clearance flow for a high-reynolds-number axial-flow rotor[J].Journal of Tubomachinery,1995,117:522-532.[6]Zierke W C,Straka W A,Taylor P D.An experimental investigation of the flow through an axial-flow pump[J].Journal of Fluids Engineering,1995,117:485-490.[7]王福军,张玲,张志民.轴流泵不稳定流场的压力脉动特性研究[J].水利学报,2007,38(8):1003-1009.Wang Fujun,Zhangling,Zhang Zhimin.Analysis on pressure fluctuation of unsteady flow in axial-flow pump[J].Journal of Hydraulic Engineering,2007,38(8):1003-1009.(in Chinese)[8]仇宝云,黄季艳,袁寿其,等.轴流泵出水管断面水流能量测定研究[J].水力发电学报,2005,24(6):104-109.Qiu Baoyun,Huang Jiyan,Yuan Shouqi,et al.Study on determination of water flow energy in section of outlet pipe of an axial-flow pump[J].Journal of Hydroelectric Engineering,2005,24(6):104-109.(in Chinese)[9]杨昌明,陈次昌,王金诺,等.轴流泵端壁间隙流动特性的数值研究[J].机械工程学报,2003,39(9):49-51.Yang Changming,Chen Cichang,Wang Jinnuo,et al.Numerical study for behavior of tip clearance flow in axial-flow pump[J].Chinese Journal of Mechanical Engineering,2003,39(9):49-51.(in Chinese) |
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