A Numerical Study on the Thermal and Fluid Flow Performance of Offset Fins

A numerical study on the thermal and fluid flow performance of the offset fins has been conducted using Fluent code. Flow in the offset fin passage was modelled in 3-dimensions. A unit cell of offset fin geometry modelled for the computational domain was given the symmetric condition at the right and left side of the cell and the periodic condition at the entrance and exit of the cell. The ranges of the major flow parameters in this study are 30≤Re≤1200 and 0.7≤Pr≤335. The results were compared with the predictions of existing correlations. The f-factor results agreed well with the existing correlations except thicker and short length fins. Based on the Fluent analysis, a new f-factor correlation has been proposed and this new correlation showed better predictions for the thicker and shorter fins. The numerical result showed that j-factor was affected by Prandtl number.제 1 장 서론 1 1.1 연구배경 1 1.2 연구목적 2 제 2 장 선행연구 고찰 3 2.1 서론 3 2.2 유동특성에 관한 연구 4 2.2.1 내부유동 4 2.2.2 옵셋휜에서의 유동 9 2.3 선행연구 고찰 요약 11 제 3 장 해석결과 및 검토 21 3.1 개요 21 3.2 격자구성 및 경계조건 22 3.2.1 격자구성 22 3.2.2 경계조건 23 3.3 해석결과 24 3.3.1 압력손실 25 3.3.2 열전달계수 28 제 4 장 결론 46 참고문헌 4

상태공간 모델에서의 상태 추정을 위한 새로운 통계적 유한 임펄스 응답 필터

Thesis (doctoral)--서울대학교 대학원 :전기컴퓨터공학부,2001.Docto

캐비티내 포획공간이 격납용기 직접가열 현상에 미치는 영향에 관한 연구

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