金属蜂窝夹芯板辐射导热耦合问题

针对金属蜂窝夹芯板,研究了其在气动加热条件下的非稳态传热行为.基于高温传热学原理,通过传热机制分析,建立了蜂窝夹芯板的导热-辐射一维瞬态耦合传热数学物理模型.在此基础上,采用控制容积法,结合蒙特卡罗法,发展形成了求解该类辐射导热耦合传热问题的数值方法,并给出了蜂窝夹芯板当量热导率和典型边界条件下金属蜂窝夹芯板瞬态温度场、非加热面热响应的计算方法,进行了典型算例计算和实验验证.结果表明,所建立的数值计算模型在预报蜂窝结构热响应方面是有效的,而且较之Swann-Pittman半经验关系式,提高了计算精度.

Radiation and conduction coupling problems of honeycomb sandwich panel

In this paper,the non-steady-state heats transfer behavior of metal honeycomb sandwich panel under aerodynamic heating was studied.Based on high temperature heat transfer theory and mechanism analysis,one-dimensional transient heat transfer mathematical physics model of honeycomb sandwich panel taking the combination of heat conduction and radiation into account was given.The control volume method and Monte Carlo method were adopted and then a numerical computation method was developed to calculate the coupling problem of heat conduction and radiation.Computation methods for effective thermal conductivities of honeycomb sandwich panel,the transient temperature field and heat response of non-heated surface under typical boundary conditions were given as well.An experiment was designed to validate this computation method.The result shows that the numerical computation model given in this paper is valid to predict the thermal performance of honeycomb sandwich structures and the values calculated are more precise than those calculated by Swann-Pittman semi-empirical relationship.