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http://dx.doi.org/10.5293/KFMA.2006.9.1.032

Influence of Circualr Casing on the Performance of Very Low Specific Speed Centrifugal Pump  

Choi, Young-Do (요코하마국립대학 대학원 공학연구원)
Kagawa, Shusaku (요코하마국립대학 대학원 공학부)
Kurokawa, Junichi (요코하마국립대학 대학원 공학연구원)
Publication Information
The KSFM Journal of Fluid Machinery / v.9, no.1, 2006 , pp. 32-39 More about this Journal
Abstract
Recently, according to the trend of small size in scale and high speed in rotation of turbomachinery, very low specific speed centrifugal pump is taking a growing interest because the pump is characterized by high head and low flow rate with convenience of manufacturing and maintenance compared with conventional positive displacement pump. However, the efficiency of the very low specific speed centrifugal pump drops rapidly with the decrease of specific speed. The purpose of this study is nor only to examine the influence of casing type on the performance of centrifugal pump in the range of very low specific speed but also to determine the proper casing type for the improvement of pump performance. The results show that circular casing is suitable for the centrifugal pump in the range of very low specific speed and the influence of impeller configuration on the pump performance is very small. Radial thrust in the circular and volute casings is considerably small in the range of very low specific speed.
Keywords
Very low specific speed; Centrifugal pump; Performance; Circular casing; Volute casing; Matching point;
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