一、有速度梯度时的火焰传播 当火焰在静止介质或速度场均匀的层流气流中传播时,焰面是一个平面。这时,任何一股气流在经过预热区时由某一部分反应区传给它一定热量,将它加热而达到反应温度。而当这股气流进入反应区时,它又将在预热区中得到的热量全部重新带回到这一部分反应区。因此,在不向外界散热的条件下,反应区的最终温度为理论燃烧温度。 但在实际应用的燃烧器中,火焰是在有速度梯度的气流中传播的。这时由反应区向 First, the flame propagation speed gradient When the flame in the static medium or velocity field uniform laminar air flow, the flame is a plane. At this time, any one of the air streams passes through a preheating zone and is transferred to a certain amount of heat by a portion of the reaction zone, heating it to the reaction temperature. When this stream of gas enters the reaction zone, it again brings back all the heat gained in the preheat zone to this part of the reaction zone. Therefore, without the heat to the outside world, the final reaction zone temperature is the theoretical combustion temperature. However, in a practical burner, the flame propagates in a gas flow with a velocity gradient. At this point from the reaction zone to