http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
반원 Pin 핀에서 비절연 끝면과 절연 끝면 경우의 열손실 비교
강형석(Hyungsuk Kang) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.5
A half circular pin fin with variable fin length, radius and convection characteristic number is analyzed by using the one-dimensional analytic method. The relative error of heat loss between non-insulated fin tip and insulated fin tip is presented as a function of fin length, radius and convection characteristic number. The fin length for the relative error being less than 5% and 1% is listed when certain values of radius and convection characteristic numbers are given. One of the results shows that the relative error increases almost linearly as the pin fin radius increases.
고정된 핀 바닥 높이에 기준한 기하학적 비대칭 사다리꼴 핀의 최적 설계
강형석(Hyungsuk Kang) 한국자동차공학회 2008 한국 자동차공학회논문집 Vol.19 No.6
A geometrically asymmetric trapezoidal fin with variable fin base thickness and height is optimized based on the fixed fin base height using a one-dimensional analytic method. The temperature profile along the normalized X position in the fin is presented. For the fixed fin base height, the optimum heat loss, fin length and efficiency as a function of inside fluid convection characteristic number, fin base thickness and height, fin shape factor, convection characteristic numbers ratio and ambient convection characteristic number are represented. One of the results shows that the effect of fin base height and ambient convection characteristic number on the optimum values is remarkable.
강형석(Hyungsuk Kang) 한국추진공학회 2007 한국추진공학회지 Vol.11 No.5
A reversed trapezoidal fin with variable lateral surface slope is optimized using a two-dimensional analytic method. For a fin base boundary condition, convection from the inside fluid to the inside wall and conduction from the inside wall to the fin base are considered. Heat loss from the fin tip surface is not ignored. The maximum heat loss at the practical fin length, the corresponding optimum fin efficiency, fin length and fin base height are presented as a function of the fin inside and outside convection characteristic numbers. One of the results shows that the optimum fin shape becomes fatter and shorter as the ratio of fin tip height to base height increases.
강형석(Hyungsuk Kang) 한국자동차공학회 2016 한국 자동차공학회논문집 Vol.24 No.2
Heat loss and fin efficiency of symmetric and asymmetric trapezoidal fins with variable slope of fins top surface are obtained by using a two-dimensional analytic method. Shapes of symmetric and asymmetric fins are changed from rectangular through trapezoidal to triangular by adjusting the fin shape factor. The ratio of symmetric trapezoidal fin length to asymmetric trapezoidal fin length is presented as a function of fin base height and convection characteristic number. The ratio of symmetric trapezoidal fin efficiency to asymmetric trapezoidal fin efficiency is presented as a function of the fin base height and fin shape factor. One of results shows that asymmetric trapezoidal fin length is shorter than symmetric trapezoidal fin length (i.e., asymmetric trapezoidal fin volume is smaller than symmetric trapezoidal fin volume) for the same heat loss when the fin base height and fin shape factor are the same.
Pin 핀에서 네가지 다른 단면적 형태가 열손실에 미치는 영향
강형석(Hyungsuk Kang) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.춘계 No.-
Pin fins with four different cross sectional area types are analyzed by using the one-dimensional analytic method. Four different cross sectional areas are circular, half circular, rectangular and triangular areas. The temperature distributions along the fin length for pin fins with four different cross sectional areas are presented. Heat loss as functions of the fin length and radius (or line) of cross sectional area is presented. The effect of area ratio on heat loss ratio with variations of convection characteristic number and fin length is listed. One of the results shows that heat loss ratio is larger than area ration when they are compared between a circular pin fin and a half circular (or triangular) pin fin based on the value of a circular pin fin.
강형석(Hyungsuk Kang) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
A convective rectangular annular fin with variable fin base thickness and height is analysed by using the one dimensional analytic method. Heat loss and thermal resistance are presentee! as a function of the fin base thickness, inside fluid convection characteristic number, fin height and fin length. The relationship between the fin base thickness and fin length for equal amount of heat loss and thermal resistance is depicted. One of the results shows that the effect of fin height and fin length on the thermal resistance is remarkable whereas the thermal resistance is independent of the variation of inside fluid convection characteristic number.
고정된 핀 바닥 높이에 기준한 비대칭 사다리꼴 핀의 최적화
송년주(Nyeonjoo Song),강형석(Hyungsuk Kang) 한국추진공학회 2012 한국추진공학회지 Vol.16 No.1
Optimization of the asymmetric trapezoidal fin with various upper lateral surface slope is made using a two-dimensional analytic method. For the fixed fin base height, the optimum heat loss, fin length and effectiveness are represented as inner fluid convection characteristic number, fin base thickness, fin base height, fin shape factor and ambient convection characteristic number. For this optimum procedure, the optimum heat loss is defined as 95% of the maximum heat loss from the fin. One of the results shows that optimum heat loss and effectiveness seems independent of the fin shape factor while optimum fin length decreases almost linearly as the fin shape factor increases.