作　　者： (温小健）; (李敏）; (许幼幼）; (刘松林）; (罗广南）;

机构地区： 中国科学技术大学核科学技术学院,合肥230026

出　　处： 《火灾科学》 2017年第2期61-67,共7页

摘　　要： 基于有障碍物氢气燃烧实验装置进行数值模拟研究,采用Fluent软件分析了半开口管道内障碍物对氢气/空气燃烧特性的影响。结果表明:障碍物会促进实验管段内氢气火焰加速,随着障碍物阻塞率和数量的增加,火焰加速更快且燃烧压力峰值更大;在相同阻塞率下,障碍物形状对氢气火焰速度和燃烧压力峰值的影响很小;燃烧压力随障碍物间距的增大先增大后减小,障碍物间距为3倍管道内径时产生的燃烧压力峰值最大。 Numerical study on hydrogen combustion in a space with obstacles was carried out based on the experiment facility of hydrogen combustion. The influence of obstacles on the combustion characteristic of hydrogen/air in a semiconfined pipe was conducted using Fluent software. The results indicated that obstacle can promote the acceleration of flame speed in the pipe. The propagation speed of the flame and the maximum combustion pressure increased with the increasing of the blockage ratio and the number of obstacles.Obstacle shape has little influence on the propagation speed and the maximum combustion pressure under the same blockage ratio of obstacle. Combustion pressure increases and then decreases with the increasing of spacing between obstacles. The peak combustion pressure is largest when the spacing of obstacles is three times of the inner diameter of the pipe.

关 键 词： 氢气 燃烧 障碍物 火焰速度 燃烧压力