飞行器环形热电器件冷却性能数值研究

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工程热物理学报 ›› 2024, Vol. 45 ›› Issue (4) : 1114-1124.

飞行器环形热电器件冷却性能数值研究

穆林^1,2, 张虎^1,2, 崔佳乐^1,2, 浦航^1,2, 东明^1,2, 尚妍^1,2

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Numerical Study on Cooling Performance of Aerocraft Annular Thermoelectric Cooler

MU Lin^1,2, ZHANG Hu^1,2, CUI Jiale^1,2, PU Hang^1,2, DONG Ming^1,2, SHANG Yan^1,2

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摘要

为了研究环形热电制冷器件(ATEC) 瞬态特性的影响，基于热-电-力多物理场耦合效应，建立ATEC 三维模型。P/N级采用Bi₂Te₃ 半导体材料，分析不同工况下关键参数对环形热电制冷器件瞬态特性影响，得到性能参数冷端温度T_c 和von Mises 应力的变化规律。通过改变ATEC 热端换热系数(h)、输入电流(I) 和冷端负载(Q_c)，研究分析不同工况下的冷端过冷温度、稳定温度和von Mises 应力分布变化，得到ATEC 工作的瞬态特性。对ATEC 热电臂尺寸(La 和Φ) 结构进行优化分析，结果表明，当ATEC 热电臂长度La = 2 mm，热电臂角度Φ = 7° 时，ATEC 冷端最低温度为277.92 K，稳定温度为284.09 K，其最大von Mises 应力为67.99 MPa。满足屈服强度并能够增强机载器件散热能力，为实际工程应用和热电冷却研究提供了理论指导。

Abstract

In order to study the influence of transient characteristics of annular thermoelectric cooler (ATEC), a 3D model of ATEC was established based on the coupling effect of thermalelectric-force multiple physical fields. The effects of key parameters on the transient characteristics of annular thermoelectric cooler under different operating conditions were analyzed by using Bi₂Te₃ semiconductor material at P/N stage, and the variation rules of the cold junction temperature Tc and von Mises stress were obtained. By changing the ATEC heat transfer coefficient (h), input current (I) and cold load (Q_c), cold junction sub-cooled temperature, stable temperature, and von Mises stress distribution at cold end under different conditions were analyzed to obtain the transient characteristics of ATEC operation. The structure of the ATEC thermoelectric arm size (La and Φ) is optimized. The results show that when the length of the ATEC thermoelectric arm is 2 mm and the Angle of the thermoelectric arm is 7°, the lowest cold end temperature of ATEC is 277.92 K and the stable temperature is 284.09 K. The maximum von Mises stress was 67.99 MPa. It can meet the yield strength and enhance the heat dissipation capacity of airborne devices, which provides theoretical guidance for practical engineering applications and thermoelectric cooling research.

导出引用

穆林, 张虎, 崔佳乐, 浦航, 东明, 尚妍. 飞行器环形热电器件冷却性能数值研究[J]. 工程热物理学报, 2024, 45(4): 1114-1124

MU Lin, ZHANG Hu, CUI Jiale, PU Hang, DONG Ming, SHANG Yan. Numerical Study on Cooling Performance of Aerocraft Annular Thermoelectric Cooler[J]. Journal of Engineering Thermophysics, 2024, 45(4): 1114-1124

基金

中国博士后科学基金面上项目(No.2021M700663)；辽宁省自然科学基金计划项目(No.2022-BS-085)；中央高校基本科研业务费(No.DUT220N202)

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2024-03-29
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2024-07-18

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