摘要
为了预测飞机燃油箱燃油温度在飞行过程中的变化情况,基于热网络法建立了飞机燃油箱非稳态热分析模型。该模型考虑了油箱内部的换热问题,同时又考虑了燃油箱壁面与外界环境间的对流换热、辐射换热以及气流的气动加热问题,将燃油箱热分析的边界扩展至燃油箱外。采用Matlab/Simulink软件实现了飞机整个航程内燃油箱系统的热分析研究,并将热分析计算结果与飞行测试数据进行了对比。结果表明,计算结果与飞行测试数据吻合良好,最大误差不超过3.2℃。
In order to investigate the changes of fuel temperature in aircraft fuel tanks in the process of flight, an unsteady thermal analysis model is developed based on the thermal network method. The model takes into account the heat transfer inside the fuel tank, at the same time, considering the convective and radiation heat transfer between the fuel tank wall and the external environment,as well as the aerodynamic heat,which extends the boundary conditions of thermal analysis to the outside of the tank. The Matlab/Simulink soft is applied to simulating the thermal characteristics of an aircraft fuel tank throughout the whole voyage. Comparisons show that the simulated results agree with the flight test data well. The maximum error is less than 3.2℃. The model could be used for thermal analysis for aircraft fuel tank system in the stage of aircraft design and the results could instruct the arrangement of heat source components inside and outside the fuel tanks.
出处
《推进技术》
EI
CAS
CSCD
北大核心
2015年第1期61-67,共7页
Journal of Propulsion Technology
关键词
飞机
燃油箱
燃油温度
非稳态热分析
Aircraft
Fuel tank
Fuel temperature
Unsteady thermal analysis
