【作者】 肖志宏； 汪荣顺； 石玉美； 顾安忠；

【机构】 上海交通大学机械与动力工程学院；

【摘要】 本文提供了一种计算分子流区辐射屏间剩余气体传热的计算方法,利用现有文献的试验数据拟合了低温下单/双原子的气体热适应系数,并在此基础上对高真空多层辐射屏内不同的剩余气体在70～300K范围内,分子流区的传热进行了计算及比较,最后简要说明了采用CO₂置换抽空的优越性,为低温容器制造中采用CO₂置换抽空提供了依据。更多还原

【Abstract】 The heat transfer model of rarefied gas between multi-layers is established. A correlation of temperature and TAC (thermal accommodation coefficient) is developed using the experimental data for both monatomic and diatomic gases. Based on this, heat transfer of different rarefied gases in free molecule regime are calculated and compared. Analysis of results illuminates the superiority of CO2 in vacuumizing craft as replacing gas, and valid evidences for its cryogenic uses are provided.更多还原