摘要
采用FLUENT软件并基于详细化学反应机理和RANS-PBE-PDF碳烟模型对非预混湍流扩散火焰中碳烟的生成进行数值模拟,研究分形维数取不同数值对碳烟生成的影响.结果表明,随着分形维数增大,碳烟凝结体尺度、碳烟体积分数和碳烟颗粒凝结频率减小;随着克努德森数的增大,碳烟的凝结频率减小;通过与实验数据对比验证了基于RANS-PBE-PDF碳烟模型的模拟数据的准确性,并得出碳烟凝结体的最终分形维数接近于1.8的结论.
The FLUENT software was used to simulate the formation of soot in the non-premixed turbulent diffusion flame based on the detailed chemical reaction mechanism and the RANS-PBE-PDF soot model.The effects of different fractal values on the formation of soot were studied.The results show that with the increase of fractal dimension,the scale of soot coagulation,the volume fraction of soot and the coagulation frequency of soot particles decrease;with the increase of Knoodson number,the coagulation frequency of soot decreases;The accuracy of the simulation data based on the RANS-PBE-PDF soot model was verified by comparison with the experimental data,and the conclusion that the final fractal dimension of the soot coagulation was close to 1.8 was obtained.
出处
《东北电力大学学报》
2019年第6期37-43,共7页
Journal of Northeast Electric Power University
基金
吉林省科技厅十三五重点科技研发项目(20180201001SF)
吉林市科技创新发展项目(201750238)
吉林省教育厅十三五科研项目(JJKH20190703KJ)
关键词
甲烷燃烧
碳烟颗粒
分形维数
凝结
Methane combustion
Soot particles
Fractal dimension
Coagulation
