航空电子模块储热器工作时间预测  

Operating time prediction of heat storage device in avionics module

作　　者：吴波[1] 张丰华[1] 田沣[1] 醋强一[1] WU Bo;ZHANG Feng-hua;TIAN Feng;CU Qiang-yi(Xi’an Aeronautics Computing Technique Research Institute,TheAviation Industry Corporation of China,Ltd.,Xi'an 710068,China)

机构地区：[1]中国航空工业集团有限公司西安航空计算技术研究所,陕西西安710068

出　　处：《工程设计学报》2021年第1期48-55,共8页Chinese Journal of Engineering Design

基　　金：装备预先研究项目(JZX6Y201901010029)。

摘　　要：航空电子模块储热器是一类广泛应用于航空电子设备的热管理装置。为了给航空电子模块储热器的工程设计提供理论支撑,对其工作时间与功耗、设定温度之间的关系进行研究。首先,综合考虑自然对流和热辐射的影响,运用传热学理论构建了储热器在实际工作环境下的热模型。然后,运用焓-多孔介质法对储热器的瞬态储热过程进行了数值模拟,并通过求解相变传热学中具有温度场理论解的斯蒂芬问题验证了数值模拟方法的准确性。最后,分别在4种典型功耗下计算得到储热器的温升曲线及其相变材料的熔化进程曲线,并与顶面绝热条件下的理想曲线进行了对比;同时,以理论规律为基础,结合数值模拟结果,得到了储热器工作时间与功耗、设定温度之间的依变关系,并采用最小二乘法对该依变关系进行了二元线性回归分析。结果表明,相比于在顶面绝热条件下,储热器在低功耗下的温升过程及其相变材料的熔化进程受自然对流和热辐射的影响较为显著;储热器工作时间与功耗在双对数坐标下呈线性关系,与设定温度在单对数坐标下呈线性关系;利用二元线性回归方法所构建的储热器工作时间预测公式具有良好的预测效果,其在建模集中的拟合误差在±4%内,拟合优度为0.993,在验证集中的预测误差在±3%内。分析得到的储热器工作时间预测公式可作为航空电子模块储热器敏捷工程设计的工具。Avionics modular heat storage device is a type of thermal management device widely used in avionics.In order to provide theoretical support for the engineering design of avionics module heat storage device,the relationship between the operating time,power consumption and set temperature is studied.Firstiy,considering the effects of natural convection and heat radiation,a thermal model of heat storage device under the actual operating environment was developed by using the heat transfer theory.Then,the enthalpy-porous media method was applied to numerically simulate the transient heat storage process of the heat storage device,and the accuracy of the numerical simulation method was validated by solving the Stefan problem with the temperature field theoretical solution in the phase change heat transfer.Finally,the temperature rise curves of the heat storage device and the melting process curves of the phase change material were obtained under four typical kinds of power consumption,and compared with the ideal curves under the adiabatic condition of the top surface;at the same time,the dependent variable relationship between the operating time,power consumption and set temperature for the heat storage device was obtained based on the theoretical rules and the numerical simulation results,and a binary linear regression analysis on the dependent variable relationship was conducted by the least square method.The results showed that,compared with the adiabatic condition of the top surface,the temperature rise process of the heat storage device and the melting process of the phase change material under the low power consumption were significantly affected by the natural convection and thermal radiation;the operating time of the heat storage device had a linear relationship with the power consumption under the double logarithmic coordinate,and it had a linear relationship with the set temperature under the single logarithmic coordinate;the operating time prediction formula for the heat storage device constructed by the bi

关 键 词：航空电子模块 储热器 工程设计 工作时间 线性回归 

分 类 号：V247[航空宇航科学与技术—飞行器设计] TK02[动力工程及工程热物理]