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Abstract: For
impellers without splitter blades, with long splitter blades and short
splitter blades, the unsteady CFD method is applied to study the whole
3D flow field in centrifugal pumps. The effects of blades arrangement
and the shape of splitter blades on the lift, pressure fluctuation at
the inlet and outlet are discussed. The pressure distribution on the
blade surfaces and in the contral rotative plane is also analyzed. In
comparison with the impeller without splitter blades, the impact of
splitter blades on flow field is analyzed in detail, and the variation
of pressure depending on the orientation of impeller relative to the
tongue is also illustrated. The results give some instructive directions
to reduce the vibration and noise of centrifugal pump from dynamics.
Key
words: Centrifugal
pump Numerical simulation Unsteady flow Splitter blades
CLC No: TH31
国家自然科学基金资助项目(50276059). Received 20050523
received in revised form 20050912
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