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本文主要研究如何应用蒙特卡洛法模拟圆筒形燃烧室内的辐射传热过程,作者采用了双重坐标系确定圆筒形壁面所发出能束的方向,这样,燃烧室内无论是体积元还是壁面元都可以用一致的格式计算能束的方向,较好地解决了逐层网格跟踪能束的问题,提供了便于在电子计算机上实现数学模拟的公式。本文研究的燃烧室内既有辐射传热,又有对流传热,火焰和烟气的吸收系数是变量,壁面存在灰污,表面温度待求,这就较好地反映了燃烧室内的真实状况。运用本文叙述的方法可以算出燃烧室内的烟气温度和壁面热流分布。
In this paper, we mainly study how Monte Carlo method can simulate the radiative heat transfer in a cylindrical combustion chamber. The author uses a dual coordinate system to determine the direction of the energy beam emitted by the cylindrical wall. In this way, both the volume element and the wall element Can calculate the direction of the energy beam in a consistent format and solve the problem of tracking the beam energy by the layer-by-layer grid, thus providing a formula for realizing the mathematical simulation on the electronic computer. In this paper, the combustion chamber has both radiative heat transfer and convective heat transfer. The absorption coefficient of flame and flue gas is a variable. There is ash on the wall surface and the surface temperature is to be found, which reflects the real situation in the combustion chamber well. Using the method described in this article can be calculated in the combustion chamber flue gas temperature and wall heat flow distribution.