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本文在自主软件GTEA基础上,针对封闭方腔内参与性介质的辐射与自然对流耦合换热进行模拟,计算结果与文献中经典算例结果吻合较好。并分析了普朗克数和介质散射反照率的变化对方腔内温度和速度的影响,结果表明:随着普朗克数的减小,增强了辐射换热的影响;考虑各向同性散射介质时,随着散射反照率的减小,中心处的温度有所增大,靠近绝热壁面处,速度U的变化更剧烈。
In this paper, based on the independent software GTEA, the radiation and the natural convective heat transfer in a confined cavity are simulated. The calculated results are in good agreement with the classical numerical examples. The influences of the Planck’s number and the albedo of the medium on the temperature and the velocity in the chamber were analyzed. The results show that the influence of the radiation heat transfer is enhanced with the reduction of Planck’s number. Considering isotropic scattering medium , As the scattering albedo decreases, the temperature at the center increases, and near the adiabatic wall, the velocity U changes more dramatically.