• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Safety science >Effects of obstacles and deposited coal dust on characteristics of premixed methane-air explosions in a long closed pipe
【24h】

Effects of obstacles and deposited coal dust on characteristics of premixed methane-air explosions in a long closed pipe

机译：障碍物和沉积的煤尘对长封闭管道中甲烷-空气预混合爆炸特性的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

An experimental system including pressure transducer, electric spark ignition device, data acquisition and control unit was set up to investigate methane-air explosions in a horizontal pipe closed at both ends with or without the presence of obstacles and deposited coal dust. The experimental results show that explosion characteristics depended on the methane content, on the layout of obstacles, and on the deposited coal dust. Pressure fluctuation with a frequency of 150 Hz appeared in its crest when the methane content was close to the stoichiometric ratio (9.5% methane percentage by volume). The pressure rise rate increased locally when a single obstacle was mounted in the pipe, but it had little effect on the pressure peak. Repeated obstacles mounted in the pipe caused the pressure to rise sharply, and the mean maximum explosion overpressure increased with the increase of the obstacle's number. The amplitude of pressure fluctuation was reduced when deposited coal dust was paved in the bottom of the pipe. However, when repeated obstacles were arranged inside, the maximum overpressures were higher with coal dust deposited than pure gas explosions.
机译：建立了一个包括压力传感器，电火花点火装置，数据采集和控制单元的实验系统，以研究在两端封闭的水平管中是否存在障碍物和沉积的煤尘的甲烷-空气爆炸。实验结果表明，爆炸特性取决于甲烷含量，障碍物的布置以及沉积的煤尘。当甲烷含量接近化学计量比（甲烷体积百分比为9.5％）时，在其波峰处出现频率为150 Hz的压力波动。当在管道中安装单个障碍物时，压力上升率会局部增加，但对压力峰值的影响很小。安装在管道中的障碍物不断重复，导致压力急剧上升，并且平均最大爆炸超压随障碍物数量的增加而增加。当沉积的煤尘铺在管道底部时，压力波动幅度减小。然而，当内部布置有重复的障碍物时，沉积的煤尘的最大超压高于纯气体爆炸。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号