用数值积分变换法求解变截面直肋内的周期性导热  

HYBRID SOLUTION OF OSCILLATORY HEAT TRANSFER IN NONUNIFORM CROSS SECTION FINS WITH INTEGRAL TRANSFORM ALGORITHM

作　　者：刘中良[1] 施明恒[1] 戴锅生[1] 

机构地区：[1]山东东营石油大学机械系,东南大学动力系

出　　处：《石油大学学报（自然科学版）》1995年第6期58-64,共7页Journal of the University of Petroleum,China(Edition of Natural Science)

摘　　要：对近几年来发展起来的数值积分变换法作了扼要介绍，并对其特征值问题的构造方法进行了探讨，文章指出构造特征值问题的关键是抓庄原问题的主要特征。文中还对梯形直肋变换热系数条件下的周期性导热问题用数值积分变换法进行了分析计算，结果表明，周期性导热与非周期性导热不同，其肋片效串随时间发生明显的周期性振荡，由于肋片温度变化的滞后，并有可能出现助片效率大于１的情况。A numerical integral transform method iS presen ted for dealing with oscillatoryheat transfer in nonuniform cross section fins with a variable heat transfer coefficient,It isimportant to construct an auxi liary eigenval ue problem whiChreflects thCmdncharacteristicsof the original problem in order to enhance the convergence rate. The numerical results arealso presented for trapezoidal straight fins.The results show that the fin efficien cy of theoscillatory heat transfer fins in very different to the one of the non-oscillatory heat transferfins in that it oscillates with the time and it may be greater than unit under some extremeconditions.

关 键 词：肋片 传热 积分变换 热力工程学 换热设备 

分 类 号：TK172[动力工程及工程热物理—热能工程]