Numerical investigation on influence of diffuser vane height of centrifugal pump
作者： Lei Fu , Xiangyuan Zhu , Wei Jiang , Guojun Li
DOI: 10.1016/J.ICHEATMASSTRANSFER.2017.02.014
关键词: Specific speed 、 Flow (psychology) 、 Mechanics 、 Impeller 、 Diffuser (thermodynamics) 、 Volute 、 Vortex 、 Materials science 、 Centrifugal pump 、 Internal flow 、 Optics
摘要: Vaned diffusers are extensively used in centrifugal pumps, but the influence of vane height on internal flow field and overall performance is not explicit. This paper mainly presents numerical investigation mechanism diffuser a single-stage pump. The head values were carried out low specific speed pump equipped with different by simulation experimental method. And deviation between results < 5%. h/b ratio changed as 0, 0.3, 0.4, 0.5, 0.6, 0.8, 1 this study. analysis shows that reducing could eliminate vortex which appears at tongue region. Meanwhile, rotor-stator interaction was reduced height. Consequently, energy loss volute both be decreased design point over point. In other hand, circumferential velocity partial gets larger lead to large frictional loss. general, improve output work impeller.
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