中国空间科学技术

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真空同心管套的热分析

钟奇,徐济万   

  1. 北京空间飞行器总体设计部
  • 发布日期:1998-08-25

THERMAL ANALYSIS OF VACUUM CONCENTRIC TUBE ANNULUS

Zhong Qi Xu Jiwan (Beijing Institute of Spacecraft System Engineering,Beijing 100086)   

  • Published:1998-08-25

摘要： 真空同心管套涉及传导、辐射等传热方式，其中低压气体的热传导非常复杂，是分析问题的关键。对处于不同隔热措施的真空同心管套内辐射换热和气体导热予以准确的描述，建立了传热模型。并在考虑材料真空放气的情况下，计算了管套的当量导热系数。所用方法和技术可用于空间热物理等领域中类似问题。

关键词: 传热, 真空装置

Abstract: Thermal behavior of vacuum concentric tube annulus is a process involving combined heat transfer mode,in which the thermal conduction of low pressure gas plays an important role.Accurate description is proposed for thermal radiation and gas conduction in the annulus under various heat insulation conditions and theoretic model is derived.With vacuum outgassing taken into acount,the equivalent conductivity of annulus is analyzed in detail.The method and technique employed is applicable to similar circumstances in the fields including space thermal physics.