流体机械

2014, v.42;No.506(08) 31-35

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导叶出口安放角对双向轴流泵性能的影响
Effects of Guide VaneOutlet-stagger-angle on BidirectionalAxial Pump Performance

王俊;马鹏飞;王军;刘卫伟;蔡奎义;
WANG Jun;MA Peng-fei;WANG Jun;LIU Wei-wei;CAI Kui-yi;Huazhong University of Science and Technology;Shanghai East Pump( Group) Co. Ltd.;

摘要(Abstract):

导叶出口安放角是影响导叶能量回收能力的关键因素之一,为研究其对双向轴流泵性能的影响,采用流线法设计了11个不同出口安放角的导叶模型,通过数值方法分析各模型内流场特性和外特性。结果表明:设计工况下,出口安放角为70°时,模型效率最高,随着该角度增大,导叶出口后轴截面上的低压区扩大,同时在导叶吸力面中部靠近进口位置出现了较大的低压区,产生脱流及二次回流损失,模型效率下降。说明在设计导叶时,选取较小的出口安放角,且不同截面的翼型骨线采用直线与圆弧的直弯组合形式可以有效改善双向轴流泵在设计工况下的性能。
Guide vane outlet-stagger-angle is one of the key factors that affect the abilities of energy recovery. To investigate the effects on bidirectional axial flow pump,streamline design method was employed to design eleven guide vane models under different outlet-stagger-angles. Numerical simulation was conducted to analyze the models' inner and outer flow field characteristics.The result shows thatthe maximum efficiency of model pump can be obtained at 70°of outlet-stagger-angle. There are the low pressure areas on the axial cross section after guide vane outlet which expand alone with the angle increasing and there are the greater low pressure areas nearby inlet of the middle region of guide vane suction surface at the same time,which can induce to the secondary flow and separating lossand the efficiency decreasing. It can be demonstrated that the performance of bidirectional axial flow pump can be efficiently improved by adopting the combination form of straight lines and circular arcs of guide vane various airfoil profile sections at design operating condition when designing guide vane by choosing smaller outlet-stagger-angle.

关键词(KeyWords): 轴流泵;导叶;出口角;数值模拟
saxial flow pump;guide vane;outlet-angle;numerical simulation

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作者(Author): 王俊;马鹏飞;王军;刘卫伟;蔡奎义;
WANG Jun;MA Peng-fei;WANG Jun;LIU Wei-wei;CAI Kui-yi;Huazhong University of Science and Technology;Shanghai East Pump( Group) Co. Ltd.;

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