一种基于工程化气动加热算法的天线热防护设计

A Thermal Insulation Design of Hyper-sonic Antenna Based on Engineering Algorithm of Aerodynamic Heating Effect

高超音速气动热仿真技术是提高天线热防护能力的重要支撑之一,为了进一步缩短研制周期和节约成本,本文提出了一种以冷壁热流和壁面恢复焓为输入条件,以MATLAB和CFD联合迭代快速求解高速气流中天线温度场的工程化算法。在利用气动热试验证明仿真结果与实验数据的高一致性后,以该仿真方法对一个高速气动加热时长为500 s的天线实施了防隔热优化设计,根据仿真评估出的导致核心器件温升的主、次要因素,针对性地提出改进措施,最终目标印制板由过往的320℃下降到了142℃,热控效果显著。

Top hypersonic aerodynamic heat simulation technology is one of the important supports for improving the heat pro-tection capability of antennas.To further shorten the development cycle and save costs,this article proposes an engineering algo-rithm that uses cold wall heat flux and wall surface recovery enthalpy as input conditions,and utilizes MATLAB and CFD joint itera-tive rapid solution method to quickly solve the antenna temperature field in high-speed airflow.After confirming the high consisten-cy between simulation results and experimental data through aerodynamic heat tests,this simulation method was used to perform heat insulation optimization design for an antenna with a high-speed aerodynamic heating duration of 500 seconds.Based on the pri-mary and secondary factors identified through simulation that cause temperature rise of the core device,targeted improvement mea-sures were proposed.The final target printed circuit board temperature was reduced from 320℃to 142℃with significant thermal control effects.