行波管阴极和热子组件的热特性的数值模拟和实验研究

李鑫伟; 俞世吉; 苏小保; 方有维; 孟鸣凤; 邢艳荣; 刘柳平

doi:10.11999/JEIT160035

行波管阴极和热子组件的热特性的数值模拟和实验研究

doi: 10.11999/JEIT160035

基金项目:

国家863计划项目(2013AA8035040C)

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- 被引次数: 0
出版历程
- 收稿日期: 2016-01-13
- 修回日期: 2016-06-15
- 刊出日期: 2016-11-19

Thermal Simulation and Experiment on Cathode-heater Assembly of Space TWT

Funds:

The National 863 Program of China (2013AA 8035040C)

摘要

摘要: 阴极热子组件作为星载行波管的核心部件，要求它具备稳定可靠、寿命长久、低功耗的特点。该文利用数值模拟和热测实验对某星载行波管阴极热子组件结构开展了研究，提出一种接触热阻估算方法，模拟了阴极热子组件结构热特性，设计并完成了阴极热子组件结构热测实验，首次获取了结构在一系列热子加热功率下由内到外的温度实测数据。进一步，通过修正阴极热子组件结构热模拟边界及激励，迭代得到接触热阻值，获取了一种高可靠的阴极热子组件结构热模型，实验表明，该热模型阴极温度计算精度在5%以内，结构最大温度计算误差不超过72 C。
- 阴极热子组件 /
- 热模型 /
- 热测实验 /
- 接触热阻
Abstract: As the core component of space traveling wave tubes, the cathode-heater assembly is required to be stable, reliable, long life and low power consumption. In this paper, an estimation method of thermal contact resistance is proposed, and the thermal characteristics of cathode-heater assembly structure are simulated. Meanwhile, thermal experiment is designed and undertaken, and the whole temperature distribution of cathode-heater assembly structure under a variety of heating power is obtained for the first time. Furthermore, the thermal boundary and excitation of cathode-heater assembly structure is modified, and the values of thermal contact resistances are obtained by interactive method. Finally, a high reliable thermal model of cathode-heater assembly structure is obtained. It is revealed that cathode temperature calculating accuracy is within 5%, and the calculating error of whole structure is less than72 C.
- Cathode-heater assembly /
- Thermal model /
- Thermal experiment /
- Thermal contact resistance

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参考文献(34)

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