Numerical simulation and laser measurement for interaction between flame and walls of various materials

通过数值模拟和实验研究了火焰与壁面的相互作用。壁效应是由热损失和表面反应引起的。许多常见材料的表面反应会减弱或淬熄火焰，而催化壁的表面反应则会增强火焰.数值结果表明，活性壁面条件下的淬熄距离大于惰性壁面条件下的淬熄距离，“淬熄”的主要原因是壁面的热损失.但表面反应影响壁附近（小于淬熄距离）的火焰行为。实验结果还表明，壁面材料的不同会影响化学组分的分布，但火焰的位置和熄灭时的速度等火焰特性在壁面位于火焰前方或后方时不会发生变化。

We investigated about flame-wall interaction by numerical simulations and experiments. The wall effects are caused by heat loss and surface reaction. The surface reaction on many common materials may weaken or quench the flames, although those for a catalytic wall can strengthen the flames.As a numerical result, the quenching distance for the active wall conditions is larger than that for inert wall conditions, and the main reason of "the quenching" is heat loss to the wall, but the surface reaction affect the flame behavior in the immediate vicinity (less than quenching distance) of the wall. Experimental results also show that the difference among wall surface materials can affect distributions of chemical species, but flame properties, such as the flame position and the velocity when flame extinction, do not change when the wall is located in front of or behind the flame.