行波管陰極和熱子組件的熱特性的數(shù)值模擬和實驗研究

李鑫偉; 俞世吉; 蘇小保; 方有維; 孟鳴鳳; 邢艷榮; 劉柳平

doi:10.11999/JEIT160035

行波管陰極和熱子組件的熱特性的數(shù)值模擬和實驗研究

doi: 10.11999/JEIT160035

基金項目:

國家863計劃項目(2013AA8035040C)

計量
- 文章訪問數(shù): 1352
- HTML全文瀏覽量: 94
- PDF下載量: 430
- 被引次數(shù): 0
出版歷程
- 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: 陰極熱子組件作為星載行波管的核心部件，要求它具備穩(wěn)定可靠、壽命長久、低功耗的特點(diǎn)。該文利用數(shù)值模擬和熱測實驗對某星載行波管陰極熱子組件結(jié)構(gòu)開展了研究，提出一種接觸熱阻估算方法，模擬了陰極熱子組件結(jié)構(gòu)熱特性，設(shè)計并完成了陰極熱子組件結(jié)構(gòu)熱測實驗，首次獲取了結(jié)構(gòu)在一系列熱子加熱功率下由內(nèi)到外的溫度實測數(shù)據(jù)。進(jìn)一步，通過修正陰極熱子組件結(jié)構(gòu)熱模擬邊界及激勵，迭代得到接觸熱阻值，獲取了一種高可靠的陰極熱子組件結(jié)構(gòu)熱模型，實驗表明，該熱模型陰極溫度計算精度在5%以內(nèi)，結(jié)構(gòu)最大溫度計算誤差不超過72 C。
- 陰極熱子組件 /
- 熱模型 /
- 熱測實驗 /
- 接觸熱阻
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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