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원심 전향익 송풍기 날개 후단의 형상에 따른 소음 분석
김휘중(H.-J. KIM),정근화(K.-H. JUNG),이창준(C.-J. LEE),이승배(S. LEE) 한국유체기계학회 2000 유체기계 연구개발 발표회 논문집 Vol.- No.-
The turbulent broadband sound power from a forward curved bladed fan can be modeled by the trailing edge noise. The trailing edge noise is usually influenced by inflow turbulence, separation, and boundary layer on the blade. This paper reports the effects of the solidity (C/S) and the stagger angles upon the trailing edge noise with respect to the trailing edge shapes of circular-are cambered blade of multi-bladed fan, and discusses the major physical mechanism of reduced noise for the circular trailing-edged case.