复杂条件下放射性沾染数值模拟研究进展
Progress in Numerical Simulation of Radioactive Fallout with Complex Conditions
黄流兴 1卓俊 2李雅琦 1牛胜利 2伏琰军 2李夏至 2朱金辉 2牛进林2
作者信息
- 1. 西北核技术研究所,陕西 西安 710024
- 2. 西北核技术研究所,陕西 西安 710024;强脉冲辐射环境模拟与效应全国重点实验室,陕西 西安 710024
- 折叠
摘要
近地核爆炸烟云中的放射性颗粒在不同高度风的驱动下扩散并沉降,引起大范围的放射性沾染.传统放射性沾染预测模型建立在理想地形和气象条件下,无法解决复杂条件下的放射性沾染预测问题.本文介绍了作者所在团队近 10 年来在复杂条件下放射性沾染数值预测方面的研究进展.首先基于气固两相流模型建立了放射颗粒大气输运与沉降过程的数值模拟方法;然后分别采用雨滴碰撞模型和级联降尺度技术实现了降雨天气和复杂地形条件的放射性沾染预测;最后,利用建立的复杂条件下放射性沾染数值预测能力开展了沾染辐射环境分布规律计算研究,得到了有意义的结果.
Abstract
The radioactive particles in the cloud of near-earth nuclear explosion diffuse and settle under the driving of wind at different heights,causing a wide range of radioactive contamination.Traditional fallout prediction models are based on ideal terrain and meteorological conditions,which can not solve the problem of prediction of radioactive contamination under complex conditions.This paper introduces the research progress of the authors'team on the numerical prediction of radioactive contamination under complex conditions in the past 10 years.Firstly,the numerical simulation method of atmospheric transport and settlement of radioactive particles is established based on the gas-solid two-phase flow model.Then the raindrop collision model and cascade downscaling technique are used to realize the prediction of radioactive contamination in rainfall weather and complex terrain conditions respectively.Finally,the numerical prediction ability of radioactive contamination under complex conditions is used to calculate the distribution law of contaminated radiation environment,and some significant results are obtained.
关键词
放射性沾染/气固两相流/数值模拟/湿沉降/复杂地形Key words
radioactive fallout/gas-solid two-phase flow/numerical simulation/wet deposition/complex terrains引用本文复制引用
出版年
2024
NETL
NSTL
万方数据