采用了传统的热力理论，在火焰上建立热能平衡式．该平衡式不仅考虑了新鲜混合气的热焓变化以及反应区过来的热量，更进一步考虑了燃烧反应本身的放热率．采用奇异摄动法得到预混丁烷气的层流火焰传播速度表达式，并与采用本生灯试验测试系统测得的预混气平均火焰传播速度进行了比较，得到了较为满意的结果． Adopting the traditional theory of thermodynamics, a thermal energy balance is established on the flame. The equilibrium not only takes into account the change of enthalpy of the fresh mixed gas and the heat from the reaction zone, but also further considers the heat release rate of the combustion reaction itself. Singularly perturbed method was used to obtain laminar flame propagation velocity of premixed butane gas and compared with the average flame propagation speed of premixed gas measured by Bunsen burner test system. The satisfactory results were obtained.