机载有源相控阵天线冷板设计和流热耦合分析.pdf

摘要机载有源相控阵雷达实现了机载雷达从机械扫描向电子扫描、单一功能向多功能的转变,使机载雷达发生质的飞跃。有源相控阵雷达已经成为下一代火控雷达发展的必然趋势,是第四代战斗机的主要标志。有源相控阵雷达的热功耗主要集中在其天线上,而相控阵天线的热设计直接关系到天线的电性能指标,并最终影响相控阵雷达的探测、跟踪、目标识别等性能,但由于机载平台的限制,给天线的热设计带来极大的挑战。本文结合机载有源相控阵天线T/R组件的结构与温度场特性,在国内外热控技术与冷板设计的发展现状的基础上,研究了一种基于三维建模软件Pro/E和流热仿真软件ANSYS CFX的冷板设计方法,并对机载有源相控阵天线冷板进行了流热耦合分析。本文使用Pro/E进行冷板的建模、ICEM CFD进行网格划分、CFX—Pre进行前处理、,最后用CFX—Post进行后处理,计算具有S型流道结构的机载有源相控阵天线冷板的温度场和流场,并分析了冷却液入13速度、入口温度以及导流片对冷板散热性能的影响。仿真结果表明,增加冷却液入口速度、降低冷却液入口温度以及增加导流片都会降低热源的最高温度,但是在增加入V1速度和在流道中增加导流片的同时,也增大了进出口压降,造成了能量损失。因此,为设计一个最优的冷板结构,需对冷却液入口速度和导流片的数量与尺寸进行综合优化。关键词:机载有源相控阵天线T/R组件冷板液冷ANSYS CFX Abstract Airborne activephased array radartakes aqualitative leap toairborne radars, because realizesthechange frommechanical scanning toelectronicscanning,and from asingle function tomuti- phased array radar has e the inevitabledevelopment trend ofnext·-generation fire-·controlradar,and is themain mark offourthgeneration矗ghter. Thepower consumption ofactivephased array radarfocused on thermal design ofairborne activephased array antenna directly relates totheantenna electricalperformance,and finally affectsthephased array radarperformances suchas detection,tracking and tothelimitofairbomeplatform,there is a greatchallenge toairborneactivephased arrayantenna’Sthermal to the structure and temperature fieldcharacteristicsofT/Rmodules ofactivephased arrayantenna,base on thestatesof the thermal control technology and cold plate design athome and aboard,a method isproposed todesign cold plate,which Was based on the 3-D modeling software Pro/Eand flow-thermal simulation software ANSYS ,the fluid-thermal coupling analysis ofcoldplate of airbome phased arrayantenna was discussed thoroughly. 111esoftware Pro/EWas used forbuilding 3Dmodel ofcoldplate,software ICEM CFD formeshing,software CFX—Pre forpre-processing,software CFX—Solver for solving management and software CFX—Post forpost— flo