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通过二维双温模型研究过滤燃烧火焰锋面倾斜的演化规律。给定初始倾斜角度(8°),甲烷/空气在当量比为0.2～0.5,流速为0.4～1.2 m/s的范围内,研究倾斜火焰锋面的演变。结果表明,在流速较大时,火焰锋面演化类似于S形的火焰;在流速较小时,火焰锋面演化为特征火焰。分析表明,形成以上火焰的原因是由于初始倾斜火焰在燃烧器中径向不同位置的传播速度不同。数值计算捕捉到了倾斜火焰发展的基本形态。
Study on the Evolution of Preceding Inclination of Fired Flame by Two Dimensional Two Temperature Model. The evolution of oblique flame front was studied with a given initial tilt angle (8 °), methane / air ratio of 0.2-0.5 and flow rate of 0.4-1.2 m / s. The results show that the flame front evolves similarly to the S-shaped flame at high flow velocities, and the flame front evolves into a characteristic flame at low flow velocities. The analysis shows that the reason for forming the above flame is due to the fact that the initial inclined flame propagates at different radial velocities in the burner. The numerical calculation captures the basic form of oblique flame development.