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적합직교분해를 이용한 2차원 실린더 후류 유동장 분석 및 재구성
이희남,김기희,Rhee, Hui-Nam,Kim, Gi-Hee 한국군사과학기술학회 2010 한국군사과학기술학회지 Vol.13 No.1
Proper Orthogonal Decomposition (POD) is applied to the analysis of 2-dimensional cylinder wake flow. Time histories of flow variables were obtained by the incompressible CFD analysis. By using the method of snapshots the correlation matrix was constructed, and then eigenvalues, POD modes and time coefficients were calculated. Finally the flow field was reconstructed by using a few of the lower POD modes, and compared to the original ones.
이희남(Rhee, Hui-Nam),김태성(Kim, Tae-Sung),전완호(Jeon, Wan-Ho),김현구(Kim, Hyun-Goo) 한국태양에너지학회 2013 한국태양에너지학회 논문집 Vol.33 No.1
It is difficult to avoid measurement errors caused by the shading effect of the meteorological tower, which is used for wind resource assessment according to the IEC Standard. This paper presents a validation of the computational flow analysis results by comparing the results with the wind tunnel experiment conducted for Reynolds numbers in the104 to105 range, for the preparation of a database for use in an automatic method of correcting met-tower shading errors. A three-dimensional simulation employing the MP (Modified Production) k-ԑ turbulence model predicted a wind speed deficit in the wake region according to minimum wind speed ratio, within an MAE (Mean Absolute Error) of 2.4%.