To reveal the flame propagation characteristics during coal dust explosion, a kind of coal dust cloud was studied through experiment and numerical simulation in a horizontal glass pipeline. A camera system was used to record the flame propagation progress. The result indicated that within 0.5 s after explosion, the flame propagation distance rapidly increased until the explosion reaction tended to be sufficient. Meanwhile, FLUENT was applied to numerical simulation of flame propagation characteristics during coal dust explosion. The simulation result showed that with the setting value of ignition temperature increasing from 1373 K to 1473 K, the simulation error was within the acceptable range and the simulation result was consistent with the experimental result. According to the simulation result of the explosion flame temperature, the explosion pipeline space was divided into five zones. It also revealed the flame temperature distribution on different cross sections along Z-axis when the explosion reaction was sufficient, which indicated that part of the explosion flame heat propagates back along the negative direction of the Z-axis.

为了揭示煤尘爆炸过程中火焰的传播特性，通过实验和数值模拟在水平玻璃管道中研究了一种煤尘云。使用摄像机系统记录火焰传播过程。结果表明，爆炸后0.5 s内，火焰传播距离迅速增大，直至爆炸反应趋于充分。同时，将FLUENT应用于煤尘爆炸过程中火焰传播特性的数值模拟。仿真结果表明，随着点火温度设定值从1373 K增加到1473 K，仿真误差在可接受的范围内，仿真结果与实验结果吻合。根据爆炸火焰温度的模拟结果，爆炸管道空间分为五个区域。当爆炸反应充分时，还揭示了沿Z轴不同横截面的火焰温度分布，这表明爆炸火焰的一部分热量沿Z轴的负方向传播回去。