| 微型电阻加热推进器内的传热问题 |
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| 引用本文： | 吕晓辰,姜培学,任泽霈,孙锡九. 微型电阻加热推进器内的传热问题[J]. 计算物理, 2004, 21(1): 43-48 |
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| 作者姓名： | 吕晓辰 姜培学 任泽霈 孙锡九 |
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| 作者单位： | 清华大学热能工程系,北京,100084;清华大学热能工程系,北京,100084;清华大学热能工程系,北京,100084;清华大学热能工程系,北京,100084 |
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| 基金项目： | 国家重点基础研究发展规划项目(No.G1999033106)，国家杰出青年基金(No.50025617)资助项目 |
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| 摘 要： | 分析了微型电阻加热推进器中沸腾的特征以及过热极限温度,分别采用经典的抛物型热传导方程和非傅立叶导热的双曲型模型(C-V模型)、双元相滞后模型(DPL模型)来描述导热过程,采用有限差分法对微型电阻加热推进器中导热过程的初始阶段进行了数值求解.发现非傅立叶模型较傅立叶模型有-定的时间延迟,DPL模型与C-V模型的延迟差别不太大;在加热过程中,加热电阻及其临近的水很快会升至300℃,而大部分水的温度升得较慢.
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| 关 键 词： | 微推进器 沸腾 数值模拟 非傅立叶导热 |
| 文章编号： | 1001-246X(2004)01-0043-06 |
| 收稿时间： | 2002-12-25 |
| 修稿时间： | 2002-12-25 |
Preliminary Analysis of Heat Transfer in Micro Water Resistojet |
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| L,#,Xiao-chen,JIANG Pei-xue,REN Ze-pei,SUN Xi-jiu. Preliminary Analysis of Heat Transfer in Micro Water Resistojet[J]. Chinese Journal of Computational Physics, 2004, 21(1): 43-48 |
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| Authors: | L&# Xiao-chen JIANG Pei-xue REN Ze-pei SUN Xi-jiu |
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| Affiliation: | Department of Thermal Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | The characteristics of boiling and the superheat limit temperature in the micro water resistojet are analyzed. The beginning moment of heat transfer in micro-thrusters is described by the classical model of Fourier's law, the non-Fourier "Cattaneo-Vernotte"(C-V) model and the non-Fourier "dual phase lag"(DPL) model of heat conduction, respectively. The governing equations are numerically solved by using the finite difference method. The results show that there is a time delay between Fourier model and non-Fourier models. The heating resistor and a little amount of adjacent water reach the temperature of 300℃ quickly. However, most of the water is still in a comparatively low temperature. |
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| Keywords: | micro propulsion boiling numerical simulation non-Fourier conduction |
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