采用速度匹配法结合壁面淬熄分析甲烷本生灯层流预混火焰稳定点与熄火机理,得到了贫油与富油状态下火焰稳定点不同的移动规律,定量预测了火焰吹熄特性关系,并通过实验验证.火焰稳定点在本生灯出口附近的边界层中,该处的火焰传播速度与预混气来流速度相平衡;而在边界层中,以火焰稳定点为起点,存在一个可点火区域.随着来流预混气流速的增大或者当量比远离恰当比,这一可点火区域逐渐缩小,直至成为一个点,此时即为熄火的临界状态.通过比较近壁面的当地气流速度与火焰传播速度,并采用非耦合的方法分析壁面淬熄的影响,得到了火焰稳定点的移动规律.在径向上,火焰稳定点随来流速度增大向射流中心线方向移动;在轴向上,随流速增大,贫油工况下稳定点向下游移动,富油工况时则向上游移动.根据火焰稳定点移动规律结合可点火区域分析定量预测了吹熄特性,通过了实验验证,证明了火焰的熄火机理. The velocity matching method and the wall quenching method were used to analyze the stabilities and the flameout mechanisms of laminar pre-mixed flame in methane-enriched methane lamp. The different movement laws of the flame retardation points were obtained under lean and rich conditions. And the experimental verification.The flame stability point in the Bunsen burner near the exit of the boundary layer, where the flame propagation velocity and premixed gas flow velocity phase equilibrium; and in the boundary layer, the flame stability point as a starting point, there is a Ignitable zone. As the flow rate of the incoming pre-mix increases or the equivalence ratio becomes far away from the proper ratio, the ignitable zone is gradually reduced until it becomes a critical point of flameout. By comparing the local Air velocity and flame propagation velocity were analyzed, and the effect of wall quenching was analyzed by the non-coupling method, and the movement law of the flame stability point was obtained. In the radial direction, the flame stability point moved toward the centerline of the jet as the flow velocity increased. In the axial direction, with the increase of the velocity of flow, the stable point moves to the downstream in the lean condition and moves to the upstream in the rich condition.According to the rule of the movement of the flame stable point and the analysis of the ignitable area, Blow out the characteristics, passed the experimental verification, proved flame flameout mechanism.