축류형 홴 성능 및 소음에 영향을 미치는 설계변수 분석

초록

While input parameters for the performance and noise of axial fan are flow rate, pressure rise, rotating speed, and fan diameter, the geometric parameters of blade are sweep angle, solidity, and camber angle. The sweep angle does not affect fan performance much, but on fan noise significantly. The solidity and camber angle are closely related, therefore they have to be carefully determined for the low-noise and high-performance fan. In this paper, different design points are selected and also geometric parameters are deliberately changed for the comparision of fan noise. As a result, at the same performance, the input rotational speed affects radiated noise more significantly than others. When solidity and camber angle are increased more than those by iDesignFan program, more noise is experienced. The blade sweep method and blade numbers at same solity are observed to result in differently levels of performance and noise.