重力热管换热特性数值模拟  

Applicability of Simulation Methods in Thermosyphon

作　　者：战洪仁[1] 张海松[1] 韩冬雪[1] 李春晓[1] 吴众[1] 

机构地区：[1]沈阳化工大学能源与动力工程学院,辽宁沈阳110142

出　　处：《沈阳化工大学学报》2016年第3期254-258,共5页Journal of Shenyang University of Chemical Technology

基　　金：国家自然科学基金资助项目(61473056)

摘　　要：基于计算流体力学软件（CFD）建立重力热管（TPCT）数值模型,将数值结果与实验进行对比,进而探讨加热功率和充液率对重力热管传热性能的影响.将已发展的传热传质关系式转化为相应控制方程源项,通过自定义函数（UDF）实现重力热管内部相变过程中的传热传质过程,试图建立一个包含两相流与相变过程的重力热管CFD模型.结果表明：通过CFD数值方法可较好地模拟重力热管内部复杂的流动与传热过程;在加热功率为12-60 W内,重力热管的等效对流换热系数随加热功率增大而增大;在充液率为30%-60%范围内,重力热管的等效对流传热系数均随充液率增加而减小,当充液率为30%时,重力热管换热性能较好.A computational fluid dynamics（ CFD） model for simulation of the two-phase closed thermosyphon（TPCT） were studied,and its synthetic heat transfer characteristics was discussed based on theexperiment.Through user-defined functions（ UDF） to realize internal heat and mass transfer process in the process of phase change in TPCT. Through numerical simu-lation,f low and heat field＇scharacteristic of inlets and different configurations were gained,and the arithmetic of aerodynamics was founded. Moreover,the following contents are included： under provided heat power 12 - 60 W and filling ratio 30 % - 60 %,heat transfer coefficient of thermosyphon increases with the heating input power increasing,while decreases with the filling rate increasing and the filling ratio with 30 % is better.

关 键 词：重力热管 VOF模型 传热特性 数值模拟 

分 类 号：TK172.4[动力工程及工程热物理—热能工程]