【摘要】 建立了适应多种燃料计算的考虑多种多环芳烃(PAH)二聚反应的初始成核模型以及考虑碳烟尺寸变化引起的有效碰撞系数动态变化的氧化模型.提出了将任意大小碳烟模糊分解到典型碳烟空间的简化计算方法,避免了由于考虑多种PAH二聚反应引起的计算量增大的问题,同时实现了与分级气溶胶模型的兼容和匹配.乙烯和航空煤油Jet A-1的算例表面新模型能够改善碳烟浓度的预测精度,特别是碳烟浓度峰值的数值预测结果.更多还原

【Abstract】 A detailed soot nucleation model considering the dimerization of various PAHs and an oxidation model considering different effective oxidation collision coefficients of different soot sizes were proposed.The models are applicable to different fuel and flame conditions.A simplified calculation method was proposed,which can realize the fuzzy decomposition of arbitrary size soot into the typical soot space,thus avoiding the increased computational cost due to the consideration of numerous dimerization reactions of various PAHs,and meanwhile realizing the matching with the sectional aerosol model.The calculating results of an ethylene flame and a Jet A-1 flame show that the new model can improve the prediction accuracy of soot volume fraction,especially that of the peak value.更多还原