热离子能量转换器铯电弧工况下电子势能的分布特性  

Distribution of Electron Potential Energy of Ignited Cesium Thermionic Energy Converter

作　　者：钟武烨 吕征[1] 郑剑平[1] 杨启法[1] ZHONG Wuye;LYU Zheng;ZHENG Jianping;YANG Qifa(Division of Reactor Engineering Technology Research,China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院反应堆工程技术研究部

出　　处：《原子能科学技术》2019年第11期2223-2232,共10页Atomic Energy Science and Technology

基　　金：国家“万人计划”国防科技等领域青年拔尖人才基金资助项目

摘　　要：为阐明热离子能量转换器铯电弧工况下电子势能分布的特征,基于动理学方法建立了电极间隙低温弱电离等离子体的输运方程,将等离子体鞘层处理为输运的边界条件。采用牛顿迭代法编制了计算程序,实现了等离子体输运方程与边界条件的自适应解耦求解。研究发现,采用输运理论获得的伏安特性与实验符合较好,随着输出电流密度的增大,发射极鞘层的电子势能跃变产生了由非单调到单调的变化,同时接收极鞘层的电子势能发生跃变方向的改变。In order to illuminate the distribution of electron potential energy of ignited cesium thermionic energy converter(TEC),differential transport equations based on kinetic method were built to describe the transport of the low-temperature and weakly-ionized plasma in the interval of the electrodes.And the boundary conditions were selected by analysis of the electron potential energy in the plasma sheath.Then,the adaptive computer program based on Newton iteration algorithm was designed to solve the transport equations and boundary conditions.It is found that the calculated U-I characteristic accords with lecture result and the potential jump in the emitter sheath changes from non-monotonic to monotonic shape with the increase of the current density,while the potential jump in the collector sheath changes sign.

关 键 词：热离子能量转换 电弧工况 电子势能分布 

分 类 号：TL35[核科学技术—核技术及应用]