摘要
通过建立数学模型分析横管蒸发纵管冷凝式热管的传热过程,研究该型热管在不同工质充液量和不同的倾角的情况下,其蒸发端与冷凝端的传热系数、热流密度以及热管的总热阻等传热性能参数变化.当充液量在0%-75%之间变化时,横管蒸发纵管冷凝式热管的热阻随充液量增大而减小;当倾角在0°-45°之间变化时,其热阻随倾角增加而下降,但其下降过程存在临界角.倾角在到达临界角之前热阻下降缓慢,倾角大于临界角后其传热性能将急剧下降.研究结果表明,对该型热管传热性能影响最大的因素为有效的换热面积,其次为蒸发端换热系数的变化,冷凝端换热系数的影响最小．
By establishing a mathematical model for analyzing the horizontal tube evaporating and vertical tube condensing heat pipe heat transfer process, the changes of the evaporation and condensation side heat transfer coefficient,heat flux, the total thermal resistance of heat pipe and other heat transfer performance parameters were studied under different working fluid filling volume and different inclination. When filling amount changed from 0% to 75%, the horizontal tube evaporating and vertical tube condensing heat pipe thermal resistance decreased. When the angle of inclination changed from 0° to 45°, its resistance also decreased, but there was a critical angle for this process. Before reaching the critical angle, resistance decreased slowly;but when the angle became greater than the critical angle,heat transfer performance declined sharply. The research results showed that the most important factor for transfer performance of this type heat pipe is effective heat transfer area, coupled with the change of the evaporation side heat transfer coefficient, the influence of the condensation side heat transfer coefficient is minimal.
出处
《南通大学学报（自然科学版）》
CAS
2015年第1期23-27,共5页
Journal of Nantong University(Natural Science Edition)
关键词
横管蒸发
纵管冷凝
充液量
倾角
传热性能
horizontal tube evaporating
vertical tube condensation
filling volume
angle of inclination
heat transfer performance
作者简介
贾鹏飞（1989-），男，硕士研究生．
通信联系人：金苏敏（1960-），男，教授，主要研究方向为低温技术及热管技术应用．E-mail：smjin@njut．edu．cn
