한국유체기계학회 논문집 (The KSFM Journal of Fluid Machinery)
- 제2권3호
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- Pages.37-44
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- 1999
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- 2287-9706(pISSN)
공기 흡입이 소형 스크류식 원심펌프의 특성에 미치는 영향
Effects of Entrained Air on the Characteristics of a Small Screw-type Centrifugal Pump
초록
In a screw-type centrifugal pump, the pump head deteriorates from single-phase flow to the choke due to an increased air entrainment at a wide tip clearance compared to that of a narrow tip clearance. Moreover, at a narrow tip clearance, the pump head became partially higher in a two-phase flow than that of a single-phase flow near the best efficiency point in low void fraction region. Therefore, we observed the internal flow pattern by using a stroboscope and we measured the mean size of bubbles from the images obtained with a high speed camera. Then, we investigated the influences of the mean size of bubbles, tip clearances and flow patterns on pump performance.
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