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RISS 인기검색어
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열적 비대칭 삼각 핀의 열전달 해석 : 핀 끝 효과에 기준 Based on Fin Tip Effect
강형석 江原大學校 産業技術硏究所 2002 産業技術硏究 Vol.22 No.B
The non-dimensional heat loss from a thermally asymmetric triangular fin is investigated as a function of a ratio of upper and lower surface Biot numbers (Bi2/Bi1), the non-dimensional fin length and tip surface Biot number using the two-dimensional separation of variables method. The effect of fin tip surface Biot number on the variation of the non-dimensional temperature along the sloped upper and lower surfaces for the thermally asymmetric condition is presented. The relationship between the non-dimensional fin length and the fin tip surface Biot number for equal amount of heat loss is also discussed as well as the relationship between upper surface Biot number and tip surface Biot number for equal amount of heat loss.
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강형석,김영준 대한설비공학회 2004 설비공학 논문집 Vol.16 No.8
A modified rectangular fin is analyzed by two-dimensional analytic method and finite difference method. Relative error of heat loss from the modified rectangular fin between analytic method and finite difference method is presented. Comparisons of fin effectiveness and heat loss between a modified rectangular fin and a plane rectangular fin are made as a function of the non-dimensional fin length and wing height for different positions of wings by using analytic method. The ratio of the incremental rate of heat loss to that of the area of a modified rectangular fin is shown as a function of the wing height. One of the results shows that performance of a modified fin is more improved as the wing approaches the fin root.
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강형석,김종욱 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.B
A convective, radiating rectangular fin is analysed bv using the one dimensional analytic method, Instead of constant fin base temperature, heat conduction from the inner wall to the fin base is considered as the fin base boundary condition. Radiation heat transfer is approximately linenrized. For different fin tip length. temperature profile along the nurmalized fin position is shown. The fin tip length for 98% of the maximum heat loss with tlie variations of fin base leiigth and radiation characteristic number is listed. The maximum heat loss is presented as a function of the fin base length, radiation characteristic number and Biot number.
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유용성의 측면에서 기하학적, 열적 비대칭 사다리꼴 휜의 최적화
강형석,Kang, Hyung-Suk 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.5
Optimum fin effectiveness of geometrically and thermally asymmetric trapezoidal fins is represented as a function of the ratio of the fin bottom to top Biot numbers, the ratio of the fin tip to top Biot numbers and fin shape factor. Optimum fin effectiveness is taken as 98% of the maximum fin effectiveness by comparing the increasing rate of fin effectiveness with that of dimensionless fin length. For this analysis, two dimensional separation of variables method is used. Also, the value of the slope of upper surface of the fin and fin efficiency corresponding to optimum effectiveness are presented.
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강형석,Gang, Hyeong-Seok 대한기계학회 2002 大韓機械學會論文集B Vol.26 No.1
Fin effectiveness and efficiency of a thermally asymmetric triangular fin are represented as a function of the ratio of fin lower surface Biot number to upper surface Biot number and the non-dimensional fin length. For this analysis, two dimensional separation of variables method is used. When fin effectiveness is 2 and efficiency is 90%, the relationship between the non-dimensional fin length and the ratio of fin lower stir(ace Biot number to upper surface Biot number is shown. The relationship between the non-dimensional fin length and the upper surface Biot number for the same condition is also presented.
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