摘要
将对应态原理用于Chapman-Enskog理论修正,得到的半经验公式可较好地预测二元惰性混合气体物性。采用Fortran 95开发了氦-氙混合气体物性计算程序,分析了氦-氙混合气体物性随摩尔质量、温度、压力的变化关系。在此基础上分析了物性变化对空间布雷顿循环的绝热系数、对流换热性能、阻力特性的影响。结果表明:压力为2.0 MPa、温度为400K时,随着摩尔质量的增加,氦-氙混合气体的绝热系数由0.40(纯氦气)增加到0.44(纯氙气);混合气体相对于纯氦气的相对对流换热系数随摩尔质量的增加呈先增大后减小的趋势,在15g/mol附近取得极大值;相对压损系数则随摩尔质量的增加单调递增。分析结果可为氦-氙混合气体在空间核反应堆电源中的应用提供设计依据。
Semi-empirical correlations are accurate to predict the properties of binary mixture of noble gases,based on the Chapman-Enskog approach for dilute gases after correcting the effect of high gas density,and using the law of corresponding states.A code based on Fortran 95 was developed to predict the physical properties of heliumxenon mixture.It was used to analyze the helium-xenon mixture properties change in the relationship between molecular weight,temperature and pressure.The effects of the physical properties change on adiabatic coefficient,convective heat transfer performance and resistance characteristic of space Brayton cycle were also analyzed.The results show that at pressure of 2.0 MPa and temperature of 400 K,the adiabatic coefficient of helium-xenon mixture increases with molecular weight from 0.40（pure helium）to 0.44（pure xenon）,the normalized heat transfer coefficient of helium-xenon mixture to thatof pure helium increases firstly and then decreases with molecular weight,and the maximum normalized heat transfer coefficient occurs at a molecular weight of 15 g/mol.The normalized pressure loss coefficient monotonously increases with molecular weight.These analysis results can be applied for the design of space nuclear reactor power.
作者
杨谢
石磊
YANG Xie;SHI Lei(Institute of Nuclear and New Energy Technology,Collaborative Innovation Center of Advanced Nuclear Energy Technology,Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education,Tsinghua University,Beijing 100084,China)
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2018年第8期1407-1414,共8页
Atomic Energy Science and Technology
