The growth of carbon particles was studied in heated flows of a burnt-gas flow reactor containing mixtures of N₂/C₂H₂, and N₂/C₂H₂ with addition of H₂ or CH₄ surrounded by a rich C₂H₄/air flame. Soot particle sizes and volume fractions were measured by laser-induced incandescence (LII) between 50 and 130 mm above the nozzle exit. The measurements indicate a soot-inhibiting effect of adding H₂ to the C₂H₂/N₂ flow on both, particle sizes and soot volume fractions. The effect of CH₄ addition to the C₂H₂/N₂ flows was ambivalent, depending on the methane-to-acetylene ratio. At gas mixtures with N₂:CH₄:C₂H₂ = 0.42:0.35:0.23 and 0.39:0.32:0.29 by volume at fixed total flow rates, the measured soot volume fractions were substantially increased in presence of CH₄, while the mean diameters of the particles were slightly decreased. Gas temperatures were measured by a generalized line-reversal method with Abel transformation. Temperatures of the surrounding C₂H₄/air flame were around 1600 K, and temperatures of the inner flows, where soot formation was measured, were between 1550 and 1630 K. Plug-flow reactor calculations provided a qualitative understanding of the influence of CH₄ on the soot particle growth.

在含有N ₂ / C ₂ H ₂和N ₂ / C ₂ H _2的混合物以及添加了H ₂或CH ₄并被富C ₂包围的混合物的燃烧气流反应器的热流中研究了碳颗粒的生长。H ₄ /空气火焰。通过在喷嘴出口上方50到130 mm之间的激光诱导白炽度（LII）来测量烟尘的粒径和体积分数。测量结果表明，向C ₂ H ₂ / N ₂流中添加H ₂对粒径和烟灰体积分数均具有烟灰抑制作用。CH的作用取决于甲烷与乙炔的比例，C ₄ H ₂ / N ₂流量中的₄加成是矛盾的。在 固定的总流速下，N ₂：CH ₄：C ₂ H ₂ = 0.42：0.35：0.23和0.39：0.32：0.29的气体混合物的体积烟气体积分数在CH ₄存在下显着增加，而颗粒的平均直径略有减小。气体温度通过具有Abel变换的广义线反转法进行测量。周围的温度C ₂ H ₄空气火焰约为1600 K，测量烟灰形成的内部流动温度在1550和1630 K之间。活塞流反应器的计算提供了对CH ₄对烟灰颗粒生长影响的定性理解。