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공기 흡입이 소형 스크류식 원심펌프의 특성에 미치는 영향
김유택,다나카카즈히로,이영호,마쯔모토요이치로,Kim, You-Taek,Tanaka, Kazuhiro,Lee, Young-Ho,Matsumoto, Yoichiro 한국유체기계학회 1999 한국유체기계학회 논문집 Vol.2 No.3
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.