热特性参数可变时抛物线型截面环肋传热的最优化研究

杨翔翔

热特性参数可变时抛物线型截面环肋传热的最优化研究

杨翔翔

华侨大学

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出版历程
- 收稿日期: 1987-01-11
- 刊出日期: 1988-03-15

A Study on Heat Transfer of the Optimization in Circular Fins of Parabolic Profile with Variable Thermal Parameters

Yang Xiag-xiang

Huachiao University, Quazhou, Fujian

摘要

摘要: 肋片传热的最优化的传统处理方法是当执行一定的传热任务时,具有最少的肋片材料消耗(投资).最少重量的冷却肋片是具有抛物线型的截面.本文应用不变嵌入原理研究了当热特性参数可变时抛物线型截面环肋传热的最优几何尺寸,同时还对两个主要的物理参数,即导热系数变化参数α和放热系数变化指数m对最优几何尺寸的影响进行研究.所得结果对工程设计具有现实指导意义.

Abstract: Circular fins are used extensively in heat exchange devices to increase the heat transfer.For economic purposes,the traditional approach to the optimization of fins consists of minimizing the comsumption(investment) of fin material for the execution of a specified heat transfer task.The minimum weight cooling fin has optional profile to be a concave parabola.Therefore,the optimum geometric dimensions of circular fins of parabolic profile with variable thermal parameters are studied.The effect of the two pertinent physical parameters-thermal conductivity variation parameter a and the index of the heat transfer coefficient variation mupon the optimum geometric dimensions is aliso studied.The results presented can be used as the design guideline for engineering practice.

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参考文献(14)

[1]	Brown,A.,Optimum dimensions of uniform annular fins,International Journal of Heat and Mass Transfer,8,(1965),655-662.
[2]	Maday,C.J.,The minimum weight one-dimensional straight cooling fins,ASME Journal of Engineering for Industry,96,1,(1974),161-165.
[3]	Gceri,S.and C.J.Maday,A least weight circular cooling fin,ASME Journal of Engineering for Industry,97,1,(1975),1190-1193.
[4]	Razelos,P.,The optimization of longitudinal convective fins with internal heat generation,Nuclear Engineering and Design,54,2(1979),289-299.
[5]	Razelos,P.,The optimum dimensions of convective pin fins,ASME Journal of Heat Transfer,105(1983),411-413.
[6]	Razelos,P.,and Imre,K.,The optimum dimensions of circular fins with variable thermal parameters,ASME Journal of Heat Transfer,102,3(1980).420-425.
[7]	Netrakanti,M.N.and C.L.D.Huang.,Optimization of annular fins with variable thermal parameters by invariant imbedding,ASME Journal of Heat Transfer,107,4(1985),966-968.
[8]	Yang,X.X.and C.L,D.Huang,The optimum dimensions of circular fins of hyperbolic profile with variable thermal parameters,Kansas State University,U.S.A.,July(1986).
[9]	Mikk,I.,Convective fin of minimum mass,International Journal Heat Mass Transfer,23,(1980),707-711.
[10]	Poulikakos,D.and A.Bejan,Fin geometry for minimum entropy generation in forced convection,ASME Journal of Heat Transfer,104,11(1982),616-623.
[11]	Hrymak,A.N.,G.J.Mcrae and A.W.Westerberg,Combined analysis and optimization of extended heat transfer surfaces,ASME Journal of Heat Transfer,107,8(1985),527-532.
[12]	Schmidt,E.,Die Waermeuebertragung durch Rippen,Zeitschrift des Vereines Deutscher Ingenieure,70,(1926),885-889,947-951.
[13]	Duffin,R.J.,A variational problem relating to cooling fins,Journal of Mathematics and Mechanics,8,(1959),47-56.
[14]	Lee,E.Stanley,Quasilinearization and Invariant Imbedding,With Applications to Chemical Engineering and Adoptive Control,Academic Press(1968).