高温高密度液氦冲击压缩特性理论研究  

Theoretical research on shock compression properties of liquid helium at high temperature and density

作　　者：杨金文[1] 施尚春[1] 李巧燕[2] 孙悦[2] 

机构地区：[1]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室,四川绵阳621900 [2]四川大学原子与分子物理研究所,四川成都610065

出　　处：《爆炸与冲击》2007年第6期557-561,共5页Explosion and Shock Waves

基　　金：中国工程物理研究院面上基金项目(20040103)

摘　　要：选择高密度液氦作为研究对象,采用F.H.Ree修正的WCA状态方程和改进的分子流体微扰变分统计理论（MCRSR）,并且考虑液氦体系低温量子力学效应,计算了一次和二次冲击压力在0-108 GPa、对应温度为471-32790 K范围内的高压物态方程。在确定体系分子间相互作用时,通过实验数据拟合选取了较合理的指数6势参数。理论计算结果与实验数据吻合较好。Considering the quantum-mechanical effect at lower temperatures, the modified Weeks- Chandler-Andersen theory and improved variational perturbation principle were used to develop the single and double shock dynamic equations of state of liquid helium at the pressures ranging from 0 to 108 GPa and the temperatures ranging from 471 to 32 790 K. The appropriate exp-6 potential parameters were obtained by fitting the experimental data based on determined interactions of molecules in liquid helium. The calculated results are in good agreement with the experimental data.

关 键 词：物理力学 物态方程 流体微扰变分统计理论 液氦 冲击温度 量子力学效应 

分 类 号：O369[理学—流体力学] O521.2[理学—力学]