摘要
以空间装置中气体自然对流传热问题为目标,导出显含温度和压强两个独立热力学参数的Rayleigh 数和Knudsen 数的表达式,分析了各个特征压强段气体传热的不同状态,比较了在连续介质流动中低真空(压强大于10Pa)和微重力对空间装置中气体自然对流传热的相似影响,导出了气体压强与重力对低真空气体自然对流的影响的相似性关系式,由此可以推断低真空或微重力状态下气体自然对流的强弱的相互关系。
The problem of natural convective transfer of heat in gases
in space devices is taken to be an objective. The Rayleigh number and Knud-
sen number,which are obviously expressed as the function of temperature
and pressure,two independent parameters of thermodynamics,are derived.
The different situation of gaseous transfer of heat in each characteristic
pressure section is analyzed. The analogic effect of low vacuum and
microgravity on natural convective gaseous transfer of heat in the continuous
medium flow in space devices is compared.
出处
《中国空间科学技术》
EI
CSCD
北大核心
1992年第5期54-58,共5页
Chinese Space Science and Technology
关键词
航天器零件
真空
失重
传热
Spacecraft component
Vacuum
Weightlessness
Convection heat transfer
Analog simulation
