流体机械

2008, No.429(03) 33-38

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一种“两相流”离心泵叶轮的水力设计方法
Hydraulic Design Method for a Kind of Two Phase Flow′ Centrifugal Pump Impeller

于京诺;朱天博;王亮申;张永利;
YU Jing-nuo1,ZHU Tian-bo2,WANG Liang-shen1,ZHANG Yong-li3(1.Ludong University,Yantai 264025,China;2.Media University of China,Beijing 100024,China3.Liaoning Technical University,Fuxin 123000,China)

摘要(Abstract):

基于普朗特的边界层思想,在二维离心场内给出了叶片近壁表面固液两相流体的边界层方程及其解的表达式和边界层厚度的有限次逼近算法。并以所得到的边界层参数为依据进行叶轮的水力设计以确定叶片型线及叶轮出口参数。通过对比实验的比较,验证了设计结果的合理性,同时也验证了采用该理论进行设计所得到的产品,能够避免或减少由边界层分离所造成的脱流损失,改善了主流区的压力分布,使得水力效率相对提高,振动和噪音相对降低。不仅如此,通过实例设计的结果可以看出,该计算方法,能够在工程设计中实现计算边界层参数的要求。最后指出所给方法可以指导离心式固液两相流泵的工程设计。
Based the Prandth's thoughts on the boundary layer,the solid-liquid two phase flow boundary-layer equation of vane surface in the two-dimension centrifugal field is obtained,its solution expression and finite iteration method are also given.According to the boundary-layer parameters obtained by solving the above equation,the vane shape of pump and parameters of impeller outlet are determined.Then the contrast tests is made,the measured results prove that the kind of design technique is reasonable and feasible,meanwhile it illustrates that the pump designed by this technique can avoid or decrease the de-flow loss that is caused by the flow separation,also can improve the pressure distribution of the outer stream,so the hydraulic efficiency of pump is enhanced,the vibration and noise is debased.Finally the paper points out that the design technique and computing method can be direct to the engineering design of solid-fluid two phase flow centrifugal pump,and can be generalized.

关键词(KeyWords): 离心式固液两相流泵;边界层分离;边界层设计;对比试验
solid-liquid two-phase flow centrifugal pump;boundary-layer separation;boundary-layer design;contrast test

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作者(Author): 于京诺;朱天博;王亮申;张永利;
YU Jing-nuo1,ZHU Tian-bo2,WANG Liang-shen1,ZHANG Yong-li3(1.Ludong University,Yantai 264025,China;2.Media University of China,Beijing 100024,China3.Liaoning Technical University,Fuxin 123000,China)

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