Application of high temperature heat pipe in hypersonic vehicles thermal protection

Abstract：In order to develop further the application of high temperature heat pipe in hypersonic vehicles thermal protection,the principles and characteristics of high temperature heat pipe used in hypersonic vehicles thermal protection were introduced.The methods of numerical simulation,theory analysis and experiment research were utilized to analyze the frozen start-up and steady state characteristic of the heat pipe as well as the machining improvement for fabricating irregularly shaped heat pipe which is suitable for leading edge of hypersonic vehicles.The results indicate that the frozen start-up time of heat pipe is long (10 min) and there exists large temperature difference along the heat pipe (47 ℃/cm),but the heat pipe can reduce the temperature in stagnation area of hypersonic vehicles from 1 926 to 982 ℃ and work normally during 1 000-1 200℃.How to improve the maximum heat transfer capability end reduce the time needed for start-up from frozen state of the heat pipe by optimizing thermostructure such as designing of a novel wick with high performance is the key point in hypersonic vehicles thermal protection of heat pipe. 作者： Author： BAI Tong  ZHANG Hong  XU Hui 作者單位： College of Energy, Nanjing University of Technology, Nanjing 210009, China 期 刊： 中南大學(xué)學(xué)報(英文版)   EISCI Journal： Journal of Central South University of Technology(English Edition) 年，卷(期)： 2011, 18(4) 分類號： V244.1 Keywords： thermal protection    high temperature heat pipe    heat transfer limit    start-up time    機標分類號： O6 TK1 機標關(guān)鍵詞： thermal protection    heat pipe    high temperature    steady state characteristic    temperature difference    numerical simulation    transfer capability    experiment research    high performance    application    principles    methods of    time    analysis    used in    results    improve    develop    theory    during 基金項目： the National Natural Science Foundation of China

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