低温捕集器内部流动传热及凝结过程分析  

The Analysis of the Flow, Heat and Mass Transfer Process inside a Cryogenic PH 3 Trapper

作　　者：袁秀玲[1] 田怀璋[1] 黄东[1] 杨晓光[1] 李学迅[1] 

机构地区：[1]西安交通大学,710049

出　　处：《低温与超导》1999年第3期14-19,共6页Cryogenics and Superconductivity

基　　金：国家自然科学基金

摘　　要：建立了ＰＨ３－ Ｎ２ 低温捕集器内部凝结换热的数学模型，并进行了数值计算，从理论上研究了其传热传质过程的机理。分析了不凝性气体Ｎ２ 对低温捕集器内部ＰＨ３ 凝结换热的影响，通过数值计算获得了低温捕集器内随着捕集器高度的变化气液膜界面温度的变化、捕集器冷凝换热总热阻和液膜换热热阻的变化、捕集器内局部换热量的变化以及捕集器内换热系数和Ｎ２In this paper, a mathematical model of condensation in a cryogenic PH 3 trapper with the presence of a non-condensible gas N 2 is developed, the calculation of the model is carried out and the mechanism of heat and mass transfer is theoretically studied. It also analyses the non-condensible gas N 2's effect on the condensing heat transfer of the PH 3 in the cryogenic trapper to obtain the following three changes by numerically computation:the temperature's change of the gas-liquid film interface with the change of the height of the cryogenic PH 3 trapper, the change of the liquid film's heat resistance and the total condensing resistance of the trapper, the change of the trapper's local heat transfer capacity, the change of heat transfer coefficient of the trapper and the change of N 2's partial pressure.

关 键 词：凝结 不凝性气体 数值计算 低温捕集器 传热 

分 类 号：O514[理学—低温物理]