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http://dx.doi.org/10.5293/KFMA.2007.10.4.021

Improvement of Performance Instability and Miniaturization of Very Low Specific Speed Centrifugal Pump  

Choi, Young-Do (한국해양대학교 산학협력단)
Kurokawa, Junichi (요코하마국립대학 공학연구원)
Publication Information
The KSFM Journal of Fluid Machinery / v.10, no.4, 2007 , pp. 21-28 More about this Journal
Abstract
The ratio of disk friction loss in a centrifugal pump is very large for the total pump loss in the range of very low specific speed. Therefore, impeller radius should be shortened to increase the pump efficiency because the disk friction loss is proportional to the fifth power of impeller radius. In order to compensate the decreased head by the shortened impeller radius, vane angle at impeller outlet should be increased. However, as the vane angle at impeller outlet becomes larger, performance instability occurs at low flow rate regions. In this study, J-Groove is adopted to suppress the performance instability and detailed examination is performed for the influence of the J-Groove on the pump performance. The results show that J-Groove gives good effect on the suppression of performance instability. Moreover, as J-Groove increases pump head considerably, the pump size can be smaller for head requirements.
Keywords
Centrifugal pump; Performance instability; Miniaturization; Very low specific speed; J-Groove;
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Times Cited By KSCI : 2  (Citation Analysis)
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