基于突变理论的高温空气回转窑内燃料着火特性研究

摘要：高温空气回转窑内着火是一个非线性突变过程。以热流势函数建立了零维尖点突变模型，突变模型以炉膛温度为状态变量﹑高温空气温度和空气量为控制变量的，可以较好地解释高温空气回转窑内着火的复杂现象和系统出现的不稳定状态。高温空气量的变化，会使得系统内部的热量产生波动，引起着火或熄火，而高温空气温度的提高可以使燃烧的不稳定区域缩小。在本文燃烧条件下，高温空气温度达700℃以后，燃烧的不稳定区域逐渐减少，在空气温度为1200℃时，完全消失。

Study of Fuel Ignition Property of HTAC in Rotary Kiln Based on the Catastrophe Theory

Abstract：The fuel ignition for high temperature air combustion（HTAC）in rotary kiln is a non-liner catastrophe process. According to heat flux potential function and zero-dimensional thermal model, the cusp Catastrophe model is established and the ignition property is discussed. The cusp Catastrophe model, which considers furnace temperature as state parameter and airflow flux and air temperature as controlling parameter, can explain ignition and unsteady phenomenon well. Changing airflow flux makes system internal energy fluctuate and appear unsteady region, then ignition or flameout take place, however, high air temperature makes unsteady region decrease. After air temperature above 700℃ in HTAC, unsteady combustion region tended to decrease, and it disappears till Ta=1200℃.