@article{ref1,
title="The explosion overpressure field and flame propagation of methane/air and methane/coal dust/air mixtures",
journal="Safety science",
year="2011",
author="Bai, Chunhua and Gong, Guangdong and Liu, Qingming and Chen, Yahong and Niu, Guotao",
volume="49",
number="10",
pages="1349-1354",
abstract="The explosion of the methane/air mixture and the methane/coal dust/air mixture under 40 J center spark ignition condition was experimentally studied in a large-scale system of 10 m3 vessel. Five pressure sensors were arranged in space with different distances from the ignition point. A high-speed camera system was used to record the growth of the flame. The maximum overpressure of the methane/air mixture appeared at 0.75 m away from the ignition point; the thickness of the flame was about 10 mm and the propagation speed of the flame fluctuated around 2.5 m/s with the methane concentration of 9.5%. The maximum overpressure of the methane/coal dust/air mixture appeared at 0.5 m. The flame had a structure of three concentric zones from outside were the red zone, the yellow illuminating zone and the bright white illuminating zone respectively; the thickness and the propagation speed of the flame increased gradually, the thickness of red zone and yellow illuminating zone reached 3.5 cm and 1 cm, the speed reached 9.2 m/s at 28 ms.<p />",
language="en",
issn="0925-7535",
doi="10.1016/j.ssci.2011.05.005",
url="http://dx.doi.org/10.1016/j.ssci.2011.05.005"
}