中文摘要：

研究了火焰在有壁面散热的微细圆管中的传播过程．流动马赫数很小时，假定流体满足理想气体状态方程，采用详细化学反应机理．火焰面形状由壁面散热和流场共同决定．壁面散热增大时会导致熄火．引入二维流场使维持火焰稳定传播的壁面散热范围扩大．计算结果表明，微细圆管燃烧器内较大的火焰面曲率能促进燃烧．

英文摘要：

The characteristics of flame propagation in micro pipes are investigated with the consideration of heat loss at the wall. A laminar model under no-slip boundary conditions is applied and a multi-step reaction mechanism is adopted. The configuration of flame front is determined by both heat loss and flow field. Moreover, excessively increased heat loss will lead to the extinguishment. Meanwhile, the introduction of a two-dimensional flow field expands the range of critical magnitude of heat loss corresponding to extinguishment. The results also show that high flame curvature in micro pipes intensifies combustion.