惯性约束聚变中内爆混合的模型构建

计算物理 ›› 2017, Vol. 34 ›› Issue (4): 379-386.

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惯性约束聚变中内爆混合的模型构建

于承新¹, 范征锋^1,2, 刘杰^1,2,3, 贺贤土^1,2,3

1. 北京应用物理与计算数学研究所, 北京 100088;
2. 中国工程物理研究院聚变能源科学技术研究中心, 北京 100088;
3. 北京大学应用物理与技术研究中心, 北京 100871

收稿日期:2016-11-17 修回日期:2016-12-20 出版日期:2017-07-25 发布日期:2017-07-25
作者简介:于承新(1980-),男,博士,从事激光聚变内爆物理与数值模拟研究,E-mail:cx_yu2013@163.com
基金资助:
国家自然科学基金（11475032，91130002）；国家高技术发展计划（2012AA01A303）；国家基础研究（2013CB34100）；中国博士后科学基金（2016M590066）；中国工程物理研究院院长基金（201402037）；中国工程物理研究院聚变能源科学技术研究中心（R2014-0501-01）资助项目

Modeling of Shell-mixing into Central Hotspot in Inertial Confinement Fusion Implosion

YU Chengxin¹, FAN Zhengfeng^1,2, LIU Jie^1,2,3, HE Xiantu^1,2,3

1. Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;
2. Center for Fusion Energy Science and Technology, Chinese Academy of Engineering Physics, Beijing 100088, China;
3. Center for Applied Physics and Technology, Peking University, Beijing 100871, China

Received:2016-11-17 Revised:2016-12-20 Online:2017-07-25 Published:2017-07-25

摘要/Abstract

摘要： 从热斑质量方程和能量守恒方程入手，重新计算考虑混合后聚变燃料的比内能和比热容等热力学参数，分析混合效应在轫致辐射损失等能量输运方面的作用，构建有杂质混合情况的热斑燃烧动力学模型.根据静态模型中的热斑燃烧的功率平衡条件，研究烧蚀层杂质混合比例与点火阈值和热斑自持燃烧的关系.理论分析和数值计算表明，混合效应导致热斑中的轫致辐射增强是点火失败的重要因素之一.通过调整不同掺杂材料、混合浓度及混合方式，得到壳层混合与热斑面密度、热斑离子温度的演化之间的关系.最后，基于模拟结果给出两种降低混合影响的方法.

关键词: 惯性约束聚变, 内爆混合, 热斑燃烧, 混合效应

Abstract: From mass conservation and energy conservation of hotspot, dynamics of hotspot combustion involving shell-mix are constructed by recalculating special internal energy and heat capacity, in which bremsstrahlung radiation loss and other energy transfer are considered. With power balance in hotspot, relations between fractions of shell-mixing in hotspot and ignition threshold and self-sustainable combustion are investigated. Theoretical analysis and numerical simulation show that enhancement of radiation loss induced by shell-mixing plays dominated role in failure of ignition. By adjusting materials and mixing fraction, effects to combustion paths are studied. Finally, two methods for degrading impact of shell-mixing are proposed.

Key words: inertial confinement fusion, implosion mixing, hotspot combustion, shell-mixing

中图分类号:

O532⁺.13

于承新, 范征锋, 刘杰, 贺贤土. 惯性约束聚变中内爆混合的模型构建[J]. 计算物理, 2017, 34(4): 379-386.

YU Chengxin, FAN Zhengfeng, LIU Jie, HE Xiantu. Modeling of Shell-mixing into Central Hotspot in Inertial Confinement Fusion Implosion[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2017, 34(4): 379-386.

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惯性约束聚变中内爆混合的模型构建

Modeling of Shell-mixing into Central Hotspot in Inertial Confinement Fusion Implosion

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