摘要
基于质量守恒、能量守恒方程,耦合环路热管各关键节点处压力、温度及传热传质关系,通过计算冷凝器中汽液界面位置,将环路热管内压力损失分为蒸汽侧压损和液相侧压损,并构建了从局部到整体的稳态运行数学物理模型,重点分析了冷凝界面位置和蒸发器热泄漏对环路热管稳态运行的影响规律。发现,低热流密度下,冷凝界面越靠近蒸汽出口越有利于提高环路热管的传热性能,但随着热流密度增加,冷凝位置对环路热管稳态性能的影响程度越来越小;抑制热泄漏或增加流入补偿室内的冷量,均可增大毛细芯两侧温度梯度,降低运行温度,进而提高环路热管的传热性能。
Based on mass conservation,energy balance,combining pressure-temperature and heat &mass transfer relations,a steady-state thermodynamic-hydrodynamic analysis model was proposed.The pressure loss is divided into two parts:vapor pressure loss and liquid pressure loss,according to the location of vapor-liquid interface in the condenser.The effects of heat leakage,condenser location on operation characteristics of loop heat pipes was studied in detail.The conclusions were drawn:(1)the closer of the condenser location to evaporator,the greater of the heat transfer capacity,however the smaller the impact under higher heat flux;(2) greater temperature gradient is obtained by reducing heat leakage or increasing backflow cold energy,and improves the heat transfer performance of loop heat pipes.
作者
章先涛
蔡如桦
陈梦珂
彭晓钧
ZHANG Xian-Tao;CAI Ru-Hua;CHEN Meng-Ke;PENG Xiao-Jun(Wuhan Second Ship Design and Research Institute,Wuhan 430064,china)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2019年第12期2887-2892,共6页
Journal of Engineering Thermophysics
基金
湖北省自然科学基金资助项目(No.2018CFB337)
国家能源局资助项目(No.NY20150202)
关键词
环路热管
热力学
水动力学
冷凝位置
热泄漏
loop heat pipes
thermodynamic
hydrodynamic
condenser location
heat leakage
