【摘要】 阴极作为行波管的“心脏”,其内部结构的热耗散是影响行波管预热时间的关键问题,热传导和热辐射是引起阴极组件内部热耗散的最重要因素。建立了阴极组件热状态有限元分析方程,利用有限元ANSYS软件对阴极组件动态热耗散进行模拟分析,提取热流矢量图及温度分布图,并获得阴极达到稳态的预热时间。对实际样品进行实验验证,证明了有限元模拟方法是可行的。基于瞬态热模拟分析结果,优化设计了阴极组件中关键部件的结构及材料,有效地缩短了阴极预热时间,提高了行波管快速反应能力。更多还原

【Abstract】 Dynamic thermal dissipation of cathode module in electron gun of traveling wave tube(TWT) were theoretically simulated with a newly-developed model.The heat flux vector chart and temperature distribution chart were plotted and the warm-up time was derived by means of thermal analysis of the cathode module with the finite element method(FEM) ANSY software package.Experimental results validate the simulation.Based on the simulated thermal transient results,the structure and material of the TWT key parts have been optimized to shorten the warm-up time and to improve its fast response ability.更多还原