气溶胶迁移规律研究进展

Research Progress on Aerosol Migration Rules

随着核电的发展,超铀核素气溶胶产生的辐射危害成为不可忽视的问题,如何找出气溶胶的迁移规律是解决这一问题的关键。本文综合分析了影响气溶胶迁移行为及规律的研究成果,得出气溶胶迁移主要受胶体自身特征、载体气流状态、外界物理场的影响。胶体自身特征影响迁移侧重研究气溶胶自身特性对迁移过程中沉降、扩散和凝并的影响,属于研究理想状态下气溶胶迁移规律。载体气流状态影响迁移侧重研究载体气流的运动状态、载体气体和气溶胶颗粒之间的两相流,主要描述载体气流流态作用下气溶胶颗粒在载体气流中的分布状态。外界物理场影响迁移针对温度场、磁场、电场、湿度场展开研究,适合描述实际过程中气溶胶的迁移状态。现有迁移行为及规律未涉及多因素影响下的气溶胶迁移行为和多物理场耦合作用下气溶胶的迁移规律及其迁移模型。

With the development of nuclear power,radiation hazard caused by transuranic nuclide aerosol becomes the problem that cannot be ignored.How to find the aerosol migration rules is the key to solve this problem.The research results on influence the act of aerosol migration and migration rules are synthetically analyzed in this paper,aerosol migration is found to be primarily affected by the characteristics of aerosol’s self,carrier airflow state,and the influence of external physical field.The research about the influence of aerosol's self characteristics on migration focuses on aerosol characteristics on sedimentation,diffusion and coagulation in process of migration,which belongs to the study of aerosol migration rules under ideal conditions.The research about the influence of carrier airflow state on aerosol migration focuses on the movement state of carrier airflow,and the two-phase flow between carrier airflow gas and aerosol particles,which mainly describe the distribution of aerosol particles in carrier airflow under carrier airflow state.The research about influence of external physical field on aerosol migration focuses on temperature field,magnetic field,electric field and humidity field,which is suitable to describe the aerosol migration state in the actual process.Through analyzing influential factors of aerosol migration,it is considered that aerosol migration behavior under multi-factor,migration rules and model of aerosol under multi-physical field coupling have not been studied.