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障碍物结构对管道中预混火焰加速的影响
Influence of the Configuration of Obstacles on Premixed Flame Acceleration in a Tube
查看参考文献9篇
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文摘
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在一端封闭、一端开口的火焰传播管中均匀布置障碍物，研究了障碍物结构对管道中预混火焰传播的影响。结果表明，由于障碍物的扰动，火焰不断加速，在阻塞比相同的条件下，最终的火焰稳态速度与障碍物的形状和间距基本无关，其中障碍物间距仅仅影响火焰的加速速率，在障碍物间距约等于火焰传播管内径（W/D ≈ 1.0）时，平均火焰速度达到最大值，火焰到达稳态传播的距离最短。同时，本文用一维简化模型模拟了火焰在障碍物管道中的加速过程，计算结果与实验测试结果在定性上比较吻合，说明在管内火焰速度较低的情况下，用一维可压缩流动近似处理能初步揭示管内火焰的加速机制。 |
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其他语种文摘
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The influence of the configuration of obstacles on premixed flame acceleration in a tube has been studied in this paper. The experiment has been carried out in a flame propagation tube with repeated obstacles and with one end closed and the other opened. It is found that the flame accelerates due to turbulence produced by the obstructions and the steady flame speed is independent on the shape of obstacles when the blockage ratio is the same. The spacing of obstacles plays a role only in determining the flame acceleration rather than the steady flame speed. The highest mean flame speed is obtained when the spacing of obstacle is about equal to the inner diameter of flame tube. In addition, the flame acceleration in the obstacles-filled tube has been described with a one-dimensional model. The comparison of predicted pressure and flame speeds with measured values shows good qualitative agreement. There is an indication that in the case of low flame speed, it can preliminary delineate the mechanics of the flame acceleration to consider flame propagation as one-dimensional compressible flow. |
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来源
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燃烧科学与技术
,2002,8(6):483-486 【扩展库】
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关键词
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障碍物结构
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预混火焰
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火焰加速
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地址
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中国科学院力学研究所, 北京, 100080
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1006-8740 |
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学科
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化学 |
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基金
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国家973计划
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文献收藏号
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CSCD:1015471
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参考文献 共
9
共1页
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被引
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被引
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被引
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7.
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8.
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被引
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