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원형휜-원형관 열교환기의 휜효율 이론에 관한 수치적 검증
강희찬(H.C. Kang),임복빈(B.B. Lim),이종휘(J.W. Lee),장병춘(B.C. Chang),안서욱(S.W. Ahn) 한국전산유체공학회 2008 한국전산유체공학회 학술대회논문집 Vol.2008 No.-
The purpose of the present study is to investigate the convective heat transfer characteristics and the validity of fin efficiency of the circular finned-tube heat exchanger by using commercial CFD code. The heat transfer coefficient obtained by using the laminar model was 22% overestimated to the experimental data. The fin surface temperature compared with the experimental data measured by the liquid crystal method. The fin efficiency by the present numerical experiment, defined as normalized and averaged fin surface temperature, was greater than the theoretical fin efficiency and the difference is increased at high value of the factor m.