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该文采用蒙特卡洛方法研究包括吸收性气体和具有一定浓度颗粒的燃烧环境中的辐射传热。在蒙特卡洛程序被验证之后,研究了多重散射对辐射传热的影响。定义了一个临界颗粒体积份额 fv ,作为区分单次散射区和多重散射区的 c分界。当颗粒云的体积份额位于单次散射区和多重散射区时,其辐射通量的变化表现出不同的行为。在单次散射区,平板的辐射通量随着离子浓度增加而剧烈增长,辐射行为受到颗粒单次散射的影响。在多重散射区,离子浓度的增加不会引起辐射通量的增长,辐射通量趋近于一个固定值,辐射行为受到气体吸收和多重散射的双重影响。
In this paper, Monte Carlo method is used to study radiative heat transfer in combustion environment including absorbent gas and particles with a certain concentration. After the Monte-Carlo procedure was verified, the effect of multiple scattering on radiative heat transfer was studied. A critical particle volume fraction, fv, is defined as the demarcation between the single scattering region and the multiple scattering region. When the volume fraction of particle cloud is in single scattering area and multiple scattering area, the variation of radiation flux shows different behavior. In the single scattering region, the radiation flux of the plate increases sharply with the increase of the ion concentration, and the radiation behavior is affected by the single scattering of the particles. In multiple scattering regions, the increase of ion concentration will not cause the increase of radiation flux, the radiation flux approaches a fixed value, and the radiation behavior is doubled by gas absorption and multiple scattering.