CAJ | 학술논문

针对一种特殊的多边形蜂窝结构，利用蜂窝胞体各表面之间的角系数和杰勃哈特吸收因子计算蜂窝内部辐射引起的有效传热系数，考虑蜂窝结构本身热传导和辐射传热的耦合作用，得到蜂窝结构的耦合传热系数。计算结果表明，随着温度升高，蜂窝结构内部的辐射传热起主导作用，特别是蜂窝胞体内部上下面通过侧壁的间接辐射传热占据主导地位。为了验证方法正确性，建立了蜂窝胞体的细节有限元模型，数值对比分析表明了该方法的正确性。
침대일충특수적다변형봉와결구，이용봉와포체각표면지간적각계수화걸발합특흡수인자계산봉와내부복사인기적유효전열계수，고필봉와결구본신열전도화복사전열적우합작용，득도봉와결구적우합전열계수。계산결과표명，수착온도승고，봉와결구내부적복사전열기주도작용，특별시봉와포체내부상하면통과측벽적간접복사전열점거주도지위。위료험증방법정학성，건립료봉와포체적세절유한원모형，수치대비분석표명료해방법적정학성。
Aiming at a special polygonal honeycomb structure, using the view factors and Gebhart’s factors within a cell, the effective heat transfer coefficient caused by radiation in the honeycomb structure is calculated. The coupled effective heat transfer coefficient is derived, considering the coupling effect of the honeycomb core’s heat conduction and heat radiation. The numerical results show that with the increase of temperature, the heat radiation within the cell plays a dominant role, especially for the indirect radiation between the cell’s upper and lower surface through the side wall. To validate the correctness of the method, a detailed finite element model of honeycomb cell is established and the numerical comparison and analysis demonstrate the correctness of the method.