H_2+He流体混合物在部分离解区的物态方程  

The equation of state of H_2+He fluid mixture in the region of partial dissociation

作　　者：顾云军[1] 郑君[1] 陈志云[1] 陈其峰[1] 蔡灵仓[1] 

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波物理实验室,绵阳621900

出　　处：《物理学报》2010年第7期4508-4513,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10674120);中国工程物理研究院科学技术发展基金(批准号:2007A01002;2009B01006)资助的课题~~

摘　　要：H2+He流体混合物在高温高压下由于氢的离解化学反应形成由H2,H,He三种粒子构成的混合体系,此时粒子间的相互作用较为复杂,离解能也会由于粒子间的这种复杂相互作用而降低.本文利用自洽流体变分理论来研究部分离解区H2+He流体混合物的高温高压物态方程,模型考虑了各种粒子间的相互作用及由温致和压致效应引起的离解能降低的自洽变分修正,并通过自洽流体变分过程对非理想的离解平衡方程求解得到粒子数密度分布,进而对自由能求导获得体系的热力学状态参量.计算结果与已有的冲击波实验数据、蒙特卡罗模拟及其他理论计算进行了比较.The H2 ＋ He fluid mixture will be dissociated into a three-component mixture composed of H2 molecules,H and He atoms at high temperatures and high pressures.The dissociation energy of H2 molecule will be lowered due to the interactions between all these particles.In this paper,the self-consistent fluid variational theory is used to calculate the equation of state of H2 ＋ He fluid mixture in the region of partial dissociation,in which the various interactions between particles and the correlation contributions to the dissociation energy caused by both the temperature and pressure effects are taken into account.The dissociation degree and thermodynamic parameters are obtained from nonideal dissociation equilibrium,which is determined self-consistently by the free energy function.Comparison was made with the available shock-wave experiments,other theoretical calculations and Monte Carlo simulations.

关 键 词：H2+He流体混合物 物态方程 部分离解 自洽流体变分理论 

分 类 号：O414.1[理学—理论物理]