【摘要】 面向太赫兹行波管高可靠、高稳定工作的需求，对折叠波导慢波结构开展了热分析。采用Workbench和Fluent软件对不同热耗分布状态下的慢波结构散热性能进行了仿真对比，并探讨了微通道液冷方法对慢波结构散热性能的优化效果。仿真结果表明，在集中热载荷下，折叠波导慢波结构内部温度梯度极高，孤岛结构存在极大的烧蚀风险，且微通道液冷方法对该风险的缓解作用十分有限；在较为均匀热载荷下，折叠波导慢波结构整体温度分布较均匀，内部结构损坏风险低，但存在磁体易发生温漂的问题，微通道液冷方法对此改善效果显著，对实现太赫兹行波管高占空比下稳定工作提供了一定参考。更多还原

【Abstract】 For the demand of high reliability and stability of terahertz TWTs, a thermal analysis of the FWG SWS is carried out. Workbench and Fluent software are used to simulate and compare the heat dissipation performance of the SWS under different heat distribution states, and to explore the optimization effect of the micro-channel liquid cooling method. The simulation results show that, under a centralized thermal load, the internal temperature gradient of the FWG SWS is extremely high, there is a great risk of ablation in the island structure, and the micro-channel liquid cooling method has a limited effect on it; while under a more uniform thermal load, the overall temperature distribution is more uniform, although the magnet is prone to temperature drift, the risk of internal structure damage is low, and the micro-channel liquid cooling method can improve the situation significantly. The research provides a reference to realize stable operation of terahertz TWTs with high duty cycle.更多还原