空间低温冷屏蔽系统分布式点蒸发制冷模型表面温度分布规律研究  

Study on surface temperature distribution of spot evaporative refrigeration model of space cryogenic cold shielding system

作　　者：张周卫 刘要森 樊翔宇 汪雅红 Zhang Zhouwei;Liu Yaosen;Fan Xiangyu;Wang Yahong(Research Institute of LNG cryogenic equipment and Automation,Lanzhou Jiaotong University,Lanzhou 730070,China;School of Environment and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学LNG低温装备及自动化研究所,兰州730070 [2]兰州交通大学环境与市政工程学院,兰州730070

出　　处：《低温工程》2022年第4期14-19,33,共7页Cryogenics

基　　金：国家自然科学基金项目(51666008);甘肃省重点人才项目(26600101);甘肃省高等学校产业支撑项目(2020C-22)。

摘　　要：建立了高超音速飞行器空间冷屏蔽系统物理模型,提出了发汗型分布式点蒸发冷却模型,建立了圆形、正方形、三角形以及蜂窝形的几何单元模型。通过建立不同结构和不同间距的单元模型研究了冷屏表面温度分布规律,在确保总面积相等前提下分别对不同数目和不同间距的点蒸发模型进行了数值模拟和实验研究。研究获得了分布式点蒸发制冷模型外表面平均温度与最高温度随发汗冷却结构变化时的温度分布及变化规律,三角形结构在数量较少和间距较小时冷却效果最好,圆形和蜂窝形在数量较多时冷却效果最好,正方形和圆形在间距较大时冷却效果最好。A physical model of the space cold shielding system of the hypersonic vehicle was established,a sweat-type distributed point evaporative cooling model was proposed,the geometric element models of circle,square,triangle and honeycomb were established.The temperature distribution law of the cooling screen was studied by establishing element models with different structures and different spacing.On the premise of ensuring the total area was equal,numerical simulations and experimental studies were carried out on the point evaporation models with different numbers and different spacings.The temperature distribution,variation law of the outer surface average temperature and maximum temperature of the distributed point evaporative cooling model were obtained by studying the variation of the sweat cooling structure.The results show that triangular structures cool best with fewer numbers and spacing,round and honeycomb shapes cool best in larger numbers,squares and circles cool best when spaced apart.

关 键 词：空间冷屏蔽系统 分布式点蒸发模型 高超音速飞行器 

分 类 号：TB663[一般工业技术—制冷工程]