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本文设计搭建石英管反扩散层流燃烧实验系统,研究了不同雷诺数和燃料组分条件下反扩散火焰的温度场特性。实验表明,反扩散火焰中心某一高度存在燃料和中心空气快速混合区域,体现出一定的预混燃烧特性。随中心射流雷诺数增大,火焰底部冷核区增大,高温区位置沿轴线上移,但火焰最高温度点的水平高度先升高后降低。不同燃料组分下,反扩散火焰的整体温度有所变化,但火焰温度的分布特性基本相似。
In this paper, we design a quartz tube anti-diffusion laminar flow combustion system and study the temperature field of the anti-diffusion flame under different Reynolds numbers and fuel composition. Experiments show that there is a rapid mixing area of fuel and central air at a certain height in the center of the anti-diffusion flame, which shows a certain premixed combustion characteristics. As the Reynolds number of the jet increases, the cold core area at the bottom of the flame increases, and the position of the high temperature zone moves up the axis. However, the level of the maximum flame temperature point first increases and then decreases. Under different fuel components, the overall temperature of the anti-diffusion flame changed, but the flame temperature distribution characteristics were similar.