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NREL Phase VI 풍력발전기 저주파 소음방사 특성
모장오(Mo, Jang-Oh),김병윤(Kim, Byoung-Yun),류병남(Ryu, Byeng-Nam),이영호(Lee, Young-Ho) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
The purpose of this work is to predict the low frequency aero-acoustic noise generated from the horizontal axis wind turbine, NREL Phase VI using large eddy simulation and Ffowcs-Williams and Hawkings model provided in the commercial code, FLUENT. Calculated aerodynamic performances such as shaft torque and power are compared with experimentally measured value. Performance results show a good agreement with experimental data within about 0.8%. If the distance by two times is changed from 32D to 64D toward the downstream region, sound pressure level is reduced by about 6.4dB.
모장오(Jang-Oh Mo),강신정(Shin-Jeong Kang),김유택(You-Taek Kim),남청도(Cheong-Do Nam),이영호(Young-Ho Lee) 한국해양대학교 해사산업연구소 2002 海事産業硏究所論文集 Vol.12 No.-
A commercial CFD code is applied to analyze the 3-D viscous flow field within the impeller of centrifugal pump. Design conditions are based on 75% of design efficiency. Two design conditions (Case1, Case2) with the different blade number and blade outlet breadth are performed by changing flow rate from 8 to 26 ㎥/h at the constant 3500 rpm. The characteristics of Case1 and Case2 such as total pressure coefficient, total head, shaft horse power, power efficiency are represented due to flow rate changing at the 50% position of span direction.