热辐射计内稀薄气体流动的蒙特卡罗模拟  

Direct simulation of Monte Carlo(DSMC) of rarefied gas flow in Crookes radiometer

作　　者：吕章德[1] 王绍民[1] 

机构地区：[1]浙江大学物理系

出　　处：《空气动力学学报》2004年第4期447-451,共5页Acta Aerodynamica Sinica

基　　金：国家自然科学基金资助项目(No.60276035);航天支撑技术基金资助项目(No.2002 HT ZJDX 08).

摘　　要：本文应用直接仿真蒙特卡罗(DSMC)方法,研究了Crookes热辐射计内由于叶片两表面的温度不同而引起的稀薄气体的流动,给出了热辐射计叶片高温面温度900K,低温表面温度为300K,四种不同克努森数(Kn)下流速矢量场、温度场和叶片两面压力差的仿真结果。并与热辐射计在不同Kn数下的转速实验测量结果进行了比较,两者结果基本一致。A steady flow of rarefied gas induced around blades with unequal temperatures on its two surfaces within Crookes radiometer is investigated by the direct simulation Monte Carlo method. The blades have the 900 K temperature on one surface and 300 K on another surface. The simulation results of flow velocity field under four different Knudsen numbers and temperature fields under three different Knudsen numbers are presented and the pressure differences of the two surfaces of blade are given. These results are consistent with the experiment data. The properties of the gas flow are clarified for a wide range of the Knudsen number.

关 键 词：蒙特卡罗模拟 矢量场 稀薄气体流动 热辐射 表面温度 流速 实验测量 DSMC 叶片 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]