| 路长,李毅,潘荣锟.管道截面对氢气/空气预混爆炸影响的实验研究[J].火灾科学,2015,24(2):68-74. |
| 管道截面对氢气/空气预混爆炸影响的实验研究 |
| Experimental study of the duct cross section effects on the hydrogen/air premixed explosion |
| 投稿时间：2015-01-23 修订日期：2015-04-15 |
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| DOI：10.3969/j.issn.1004-5309.2015.02.02 |
| 基金项目:国家自然科学基金项目（51304070，50906023），河南省高等学校青年骨干教师资助计划项目（2011GGJS-051） |
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| 中文关键词: 氢气 预混爆炸 截面 郁金香火焰 传播速度 |
| 英文关键词:Hydrogen Premixed explosion Cross-section Tulip flame Propagation speed |
| 摘要点击次数: 257 |
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| 中文摘要: |
| 为研究管道截面对氢气/空气预混火焰形状与传播速度的影响，选用三个长度都为1 m而截面尺寸不同的方形管道进行实验。实验结果表明，在截面为80 mm×80 mm的管道中，四种氢气浓度下预混火焰都发展形成了郁金香火焰。火焰传播速度呈现上升，下降，再上升的波动。在截面为100 mm×100 mm和150 mm×150 mm的管道中，只有在氢气浓度20%下形成郁金香火焰, 并且传播速度也出现上述的波动。而在氢气浓度25%，30%，40%下，预混火焰都呈指尖形传至管口，未出现郁金香火焰, 传播速度都是不断上升。三个管道对比中，截面为100 mm×100 mm的管道内火焰平均传播速度最快，且压力波第一峰值最大。 |
| 英文摘要: |
| An experimental study of the duct cross-section effects on hydrogen-air premixed explosion flame shape and propagation speed is presented by using three different cross-section ducts with a length of 1000 mm. The experimental results showed that the tulip flame formed under all of four hydrogen volume fractions in the duct of 80 mm×80 mm cross-section, and the propagation speed had the trend of first rising, then falling, and rising again. The tulip flame formed only under the hydrogen volume fraction of 20% in the ducts of 100 mm×100 mm and 150 mm×150 mm cross-section, and the propagation speed showed the same trend as above. In these two ducts, the flames propagated to the nozzle with fingertip shapes under the hydrogen volume fractions of 25%, 30%, 40%, and the propagation speeds rise continually. Comparing the three ducts, the fastest flame propagation and the largest explosion pressure appeared in the duct of 100 mm×100 mm cross-section. |
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