论文部分内容阅读
气动加热与结构热传递耦合问题在航空航天领域非常重要。分析了飞行器持续受热过程中的耦合性,指出了耦合性在分析持续气动加热问题中的必要性。针对存在的耦合性,提出了一种处理方法,即在“飞机结构三维温度场分析”程序中增加气动热流工程算法,同时采用对流传热来模拟油箱内燃油与油箱内壁面传热。对流换热系数以及出口油温通过与油箱壁面结构温度耦合计算来确定,即在每个时间点上,将当前结构内壁面温度T_n代入对流换热系数α以及油温T_f的计算公式,求得该时间点的α和T_f,以此实现气动/温度场/流场三个物理场的实时耦合。计算结果表明,耦合计算结果与试验结果吻合得很好。
Aerodynamic heating and structural heat transfer coupling issues are very important in the aerospace field. The coupling of the aircraft during continuous heating is analyzed, and the necessity of coupling in the analysis of continuous pneumatic heating is pointed out. Aiming at the existing coupling, a method is proposed, which is to add aerodynamic heat flow engineering algorithm to the “three-dimensional analysis of temperature field of aircraft structure” and simulate the heat transfer inside the fuel tank and the inner wall of the tank by convection heat transfer. The convective heat transfer coefficient and outlet oil temperature are determined by coupling with the temperature of the oil tank wall structure. That is, at each time point, the temperature T n of the inner wall of the current structure is substituted into the formula of convection heat transfer coefficient α and oil temperature T_f, The time point of α and T_f, in order to achieve aerodynamic / temperature / flow field of three physical field real-time coupling. The calculation results show that the coupling calculation results are in good agreement with the experimental results.