本文利用气体示踪法研究燃烧器一、二次风混合扩散特性，对弱旋流（一次风）燃烧器和直流（侧边二次风）燃烧器组成的燃烧器组各股风混合情况进行了详细研究，得出各截面混合物浓度分布规律及混合强度分布规律，分析对燃料着火的影响，对燃烧器设计参数的选择有指导意义。 In this paper, the gas diffusion method was used to study the mixed primary and secondary air diffusion characteristics of the combustor. The mixing of the strands in the burner group consisting of the weak cyclone (primary air) burner and the direct current (side secondary air) burner A detailed study was carried out to find out the law of the concentration distribution and the intensity distribution of the mixture in each section, and to analyze the influence on the fuel ignition, which is of guiding significance for the choice of burner design parameters.