点击次数：

论文类型：期刊论文

发表时间：2014-05-01

发表刊物：JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES

收录刊物：SCIE、EI

卷号：29

期号：1

页面范围：313-318

ISSN号：0950-4230

关键字：Methane/air explosion; Ultrafine water mist; Explosion enhancement; Explosion pressure

摘要：Experiments about the influence of ultrafine water mist on the methane/air explosion were carried out in a fully sealed visual vessel with methane concentrations of 8%, 9.5%, 11% and 12.5%. Water mists were generated by two nozzles and the droplets' Sauter Mean Diameters (SMD) were 28.2 mu m and 43.3 mu m respectively which were measured by Phase Doppler Particle Anemometer (PDPA). A high speed camera was used to record the flame propagation processes. The results show that the maximum explosion overpressure, pressure rising rate and flame propagation velocity of methane explosions in various concentrations increased significantly after spraying. Furthermore, the brightness of explosion flame got much higher after spraying. Besides, the mist with a larger diameter had a stronger turbulent effect and could lead to a more violent explosion reaction. (C) 2014 Elsevier Ltd. All rights reserved.