某相控阵雷达天线阵面热设计及流量分配研究

Thermal Design and Flow Rate Distribution of Antenna Array of Phased Array Radar

有源相控阵雷达天线阵面中T/R组件的散热对雷达的性能和可靠性有重要影响。本文针对T/R组件内功率放大器体积小、热流密度大的特点,采用热控与结构协同设计技术,将水道集成在天线骨架内,并采用热仿真软件对功率器件的温度分布进行了分析。热仿真结果表明通过控制流量可以实现功率器件的良好散热。针对天线阵面冷板种类多、流量分配难度大的特点,通过在天线框架内合理布置流道,采用压力-流量匹配技术实现了25个冷板流量的精确分配。

Cooling of T/R modules in antenna array has an important effect on performance and reliability of active electronically scanned array. Power amplifier in a T/R module features small size and high heat density, integrated design of radar structure and thermal control is adopted, that is, water channels are arranged inside antenna framework. Thermal analysis to temperature distribution of power devices is conducted by using of thermal simulation software （CFD software） ; simulation results show that effective heat dissipation of the power devices can be achieved by controlling flow rate. In order to overcome challenge such as varieties of cold plates in antenna array and difficulty in flow rate distribution, pressure and flow rate matching technology is used, and precise allocation of flow rate for 25 cold plates is achieved.