相变装置二维方腔内空穴分布规律研究  

Study on Void Distribution Rule in Two-dimensional Quadrate Cavity of PCM Container

作　　者：菅鲁京 张加迅 赵欣 霍玉华 

机构地区：[1]空间热控技术北京市重点实验室,北京100094

出　　处：《中国空间科学技术》2014年第5期64-70,78,共8页Chinese Space Science and Technology

摘　　要：为了解微重力条件下空穴对相变传热过程的影响,在焓法的基础上增加了基于温度排序算法的空穴模型,在求解过程分析了温度场和空穴之间的相互作用;建立了相变装置的二维模型;研究了空穴在周期外热流条件下的移动规律。结果表明,从初始时刻到第8个轨道周期,低温区空穴逐渐消失并在高温区出现,空穴沿等温线方向扩散并最终积聚在高温边界附近,空穴的移动使传热路径上的热阻增大,导致相变装置冷热边界的传热温差增加了3℃。To study the influence of the void on phase change heat transfer process under microgravity,the void model using temperature sorting algorithm was built based on the enthalpy method,which can simulate the interaction between the void and the temperature distribution.The 2D model of phase change material container was built to study the void migration rule under the periodical heat flux boundary condition.The results show that from the initial time to the 8th period the void disappears gradually in the low temperature region and appears in the high temperature region.The void moves to the high temperature region and diffuses along the isotherms.The void migration increases heat resistance along the heat transfer route and the temperature difference about 3℃ between cold and hot boundaries.

关 键 词：固液相变 二维模型 方腔 空穴 热控 航天器 

分 类 号：TQ051.14[化学工程]