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프로펠러 수차 간극과 피치각 변화에 따른 내부 유동 특성 비교
변순석(S.-S. Byeon),홍창기(C.-K. Hong),김윤제(Y.-J. Kim) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
This article aims to numerically investigate the effects of active flow from the blade tip platform. In addition, the another independent variable is considerable modification of the exit blade tip angles. Using the free vortex theory, and operating with a gross head from 3.5m, the effect of the exit blade tip angles was investigated. It further presented theoretical methodology to analyze the effects of design parameters like the exit blade tip angles and a tip clearance. This paper describes the blade design of an axial propeller hydraulic turbine, and presented the relationship between the layout of the blade profile and the shaft power and efficiency. The results showed that the exit tip modification and tip clearance modification were decreased a significant drop of turbine efficiency about 3~13%.