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1 Systems : journal of transdisciplinary systems science

1 2008

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Wpływ pola prędkości za wirnikiem wstępnym na własności ssawne wirnika pompy wielostopniowej

Janczak M., Plutecki J.

Systems : journal of transdisciplinary systems science

2008

Vol. 13, spec. iss. 1/2

205--211

The impellers of multistage pumps has lower suction performance. To improve pumps suction performance was designed helical inducer. The flow field behind inducer was changed and it was different from normal inlet flow to impeller. This paper described a numerical investigations the influence of changeable flow field behind inducer on suction performance centrifugal impeller. In the results changeable inlets flow was increased require net positive suction head. It was caused by higher relative velocity of flow and small attack angle, so the cavitations bubble was formed inside blade channel. Cavitations bubble in this area more disturbed flow throw impeller and brought to quickly brake dawn cavitations curves.