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

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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 than 72 °C.

Key words： Cathode-heater assembly Thermal model Thermal experiment Thermal contact resistance

Received: 13 January 2016 Published: 01 September 2016

PACS:

O462.1

Fund:

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

Corresponding Authors: LI Xinwei E-mail: xwli_1989@163.com

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	LI Xinwei
	YU Shiji
	SU Xiaobao
	FANG Youwei
	MENG Mingfeng
	XING Yanrong
	LIU Liuping

Cite this article:

LI Xinwei,YU Shiji,SU Xiaobao等. Thermal Simulation and Experiment on Cathode-heater Assembly of Space TWT[J]. JEIT, 2016, 38(11): 2965-2971.

URL:

http://jeit.ie.ac.cn/EN/10.11999/JEIT160035 OR http://jeit.ie.ac.cn/EN/Y2016/V38/I11/2965

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