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研究煤粉气流的着火过程以及确定着火温度是一个极其复杂的问题。因此,先对一维煤粉气流的着火过程进行研究是合理的。这时,煤粉气流反应过程的特点和各种因素,其中包括气流速度,煤粉浓度,氧浓度、颗粒尺寸(煤粉比表面积)等对着火过程的影响都将得到反映。有一种着火过程的试验研究方法与该过程的物理模型相符,这就是在不同煤粉空气混合物初始温度下,将煤粉气流喷入管形燃烧室中来研究煤粉气流的着火过程,同时测出燃烧动力常数。试验时,燃烧室壁面温度等于煤粉气流的初始温度。
It is an extremely complicated problem to study the ignition process of pulverized coal flow and determine the ignition temperature. Therefore, it is reasonable to study the ignition process of one-dimensional pulverized coal airstream. At this time, the characteristics of the pulverized coal flow reaction process and various factors, including the airflow velocity, pulverized coal concentration, oxygen concentration, particle size (coal specific surface area) and so on the impact of the fire process will be reflected. An experimental method of ignition process is consistent with the physical model of the process. The pulverized coal flow is injected into the tubular combustion chamber at different initial temperatures of the pulverized coal-air mixture to investigate the ignition process of the pulverized coal flow. Combustion dynamic constant. During the test, the combustion chamber wall temperature is equal to the initial temperature of the pulverized coal flow.