Numerical analysis on the performance of centrifugal fans according to shapes of inlet bell-mouth in a refrigerator

입구 벨마우스 형상에 따른 냉장고 원심홴의 성능에 대한 수치적 분석

Because of complex structure of inlet and outlet flows, the performance of centrifugal fans used in a household refrigerator is affected by many parameters of duct system surrounding the fans. In this paper, the performance of a centrifugal fan is numerically analysed according to shapes of inlet bell-mouth. To improve performance of the centrifugal fan, some design parameters are selected for comparison. On a basis of these comparison, optimum shape of inlet bell-mouth is proposed to maximise the flow rate of the fan.