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RISS 인기검색어
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- 저자 : Andrew Guzzomi (검색결과 1 건)
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The flow field in a centrifugal pump with a large tongue gap and back blades
Jiancheng Cai,Jie Pan,Andrew Guzzomi 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.11
In this paper, the unsteady 3-D turbulent flow fields in an end-suction centrifugal pump with a vaneless volute are studied numericallyat three different rotation speeds. The unshrouded impeller of the pump, as a reduced diameter version of the original full-size impeller,has five backswept blades and five pump-out blades. The results show that the flow rate and pressure vary with the rotational speed accordingto the similarity law, and the normalized internal flow fields at all speeds are very similar. Due to the reduced impeller diameter,the pump efficiency is relatively low. Flows discharged from the front and back blade passages interfere with each other and swirlingmotion exists in the volute. The pressure fluctuations on the casing wall near the impeller outlet are extracted, and their spectra show thatthe component at the blade passing frequency was prominent. This study sheds some light on the characteristics of the internal unsteadyflow of a centrifugal pump at different rotational speeds, and forms a basis for future study of flow induced pump vibration and noise.
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