一、前言 气流中的扩散火焰结构的数学分析在理论和实践上都具有一定意义.前人曾提出“折算薄膜”,“边界层燃烧”,“厚交换层”等数学模型来分析中、小雷诺数下强迫对流中单燃料滴的燃烧,并与实验结果进行了对比.本文对围绕渗透出可燃气体的圆柱在强迫对流的空气气流中求解流场,并与扩散方程和能量方程联立,用松弛迭代求解浓度场和温度 I. INTRODUCTION Mathematical analysis of diffusion flame structure in airflow has certain significance both in theory and in practice.People have proposed mathematical models such as “conversion film”, “boundary layer combustion” and “thick exchange layer” The single fuel droplet forced convection in the Reynolds number combustion, and compared with the experimental results.In this paper, the flow field around the cylinder of permeable combustible gas in forced convection air flow, and with the diffusion equation and energy equation, Solve the concentration field and temperature with relaxation iteration