空冷有源相控阵发射模块散热器壳体温度场的cfd建模

Yu. E. Nikolaenko, A. Baranyuk, S. Reva, V. A. Rohachov
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引用次数: 0

摘要

现代雷达站广泛用于获取高空间分辨率的地球表面图像,识别空中、海上和地面的运动物体,并可以准确地确定其坐标和运动参数。具有大量发射模块的有源相控阵天线被广泛应用于雷达站的天线系统中。发射模块输出放大器的有源微波元件产生的热量导致其温度升高,可靠性降低。在这方面,提高输出功率放大器的有源微波元件的冷却效率的任务是重要的。本研究的目的是评估空气冷却输出功率放大器有源元件的可能性,与从砷化镓到氮化镓元素基的转变有关,产生的热量增加。本文介绍了在散热器外壳安装底座上安装8个局部放热功率为28w的发热元件的温度场的计算机模拟结果。散热片在散热器外壳的相对底座上制作。散热器外壳的翅片表面由入口温度为40℃的气流吹入。分别对1、6、10 m/s 3个介面气流流速值进行了数值模拟。结果表明,当空气流速为1m /s时,散热器外壳安装底座的最高温度为90.1℃。将空气速度提高到10m /s,可以将微波元件安装位置的温度降低到72.1°C。为了进一步提高应用冷却系统的效率,降低散热器外壳安装表面的温度,提出了一种新的技术解决方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
CFD-modeling of the temperature field of the radiator casing of the transmitting module of the active phased antenna arrays with air cooling
Modern radar stations are widely used to obtain images of earth surface with high spatial resolution, to identify moving objects in the air, on sea and on the ground, and allow determining the coordinates and movement parameters accurately. Active phased antenna arrays with large number of transmitting modules are widely used as antenna systems in radar stations. The heat generated by the active microwave elements of the output amplifiers of the transmitting module, leads to an increase in their temperature and to decrease in reliability. In this regard, the task of increasing the cooling efficiency of active microwave elements of the output power amplifiers is important. The aim of this study is to assess the possibilities of air cooling of the active elements of the output power amplifier in relation to the transition from gallium arsenide to gallium nitride element base with increased heat generation. This paper presents the results of computer simulation for the temperature filed of the mounting base of the radiator casing, on which 8 heat-generating elements with a local heat release of 28 W each are installed. Cooling fins are made on the opposite base of the radiator casing. The finned surface of the radiator casing is blown by an air stream with an inlet air temperature of 40°C. The simulation was carried out for three values of the air flow rate in the interfin channels: 1, 6 and 10 m/s. It is shown that the maximum temperature of the mounting base of the radiator casing is 90.1°C and is observed at an air flow rate of 1 m/s inside the interfin channels. Increasing the air speed up to 10 m/s makes it possible to reduce the temperature at the installation site of the microwave elements down to 72.1°C. A new technical solution was proposed to further improve the efficiency of the applied cooling system and to reduce the temperature of the mounting surface of the radiator casing.
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