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

1.
Laboratory for Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China;
2.
Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, Sichuan, China

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471～32 790 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。
- 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
Abstract: 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.
- physical mechanics /
- equation of state /
- fluid variational perturbation principle /
- liquid helium /
- shock temperature /
- quantum-mechanical effect