【作者】 李定勇； 李国军；

【Author】 Dingyong Li;Guojun Li;School of Metallurgy, Northeastern University;

【机构】 东北大学冶金学院；

【摘要】 本文基于辐射传热中的改进蒙特卡洛算法(IMCM),对二维封闭圆柱腔内辐射传热进行了研究,以二维封闭圆柱腔内均匀吸收参与性介质辐射传热为研究对象,针对模型的几何性质,推导了二维封闭圆柱腔内能束传播终点落在璧面微元上时的处理方式。以蒙特卡洛算法(MCM)计算结果作为基准,计算了不同发射点数、单个发射点能束数、壁面发射率、吸收系数以及反照率对计算效率、计算精度、辐射全交换面积、壁面辐射热流密度影响及推导给出了参与性介质温度场计算方法。得出了IMCM与MCM相比不仅能保证计算精度,并且在计算机时和运算效率上具有巨大优势。更多还原

【Abstract】 In this paper, based on the improved Monte Carlo method(IMCM) in radiative heat transfer, the radiative heat transfer in a two-dimensional closed cylindrical cavity is studied. The research object is the uniform absorption of the participating medium radiative heat transfer in a two-dimensional closed cylindrical cavity. The geometric properties of the model deduced the processing method when the end point of energy beam propagation in a two-dimensional closed cylindrical cavity falls on the bi-faced micro-element. Using the Monte Carlo method(MCM) calculation results as a benchmark, the effects of the number of different emission points, the number of energy beams at a single emission point, wall emissivity, absorption coefficient and albedo on the calculation efficiency, calculation accuracy, total radiation exchange area, and wall radiant heat flux are calculated and deduced. The calculation method of participatory medium temperature field is presented. It is concluded that compared with MCM, IMCM can not only guarantee the calculation accuracy, but also has huge advantages in computer time and operation efficiency.更多还原