水蒸气对合成气层流火焰传播特性的影响

doi:10.12068/j.issn.1005-3026.2017.10.026

东北大学学报:自然科学版 ›› 2017, Vol. 38 ›› Issue (10): 1496-1500.DOI: 10.12068/j.issn.1005-3026.2017.10.026

水蒸气对合成气层流火焰传播特性的影响

尚融雪，李刚，张培红

(东北大学资源与土木工程学院，辽宁沈阳110819)

收稿日期:2016-12-23 修回日期:2016-12-23 出版日期:2017-10-15 发布日期:2017-10-13
通讯作者: 尚融雪
作者简介:尚融雪(1987-)，女，辽宁沈阳人，东北大学讲师，博士；李刚(1969-)，男，河南信阳人，东北大学教授，博士生导师；张培红(1969-)，女，河南南阳人，东北大学教授.
基金资助:
国家“十二五”科技支撑计划项目(2015BAK16B01，2015BAK40B01)；国家重点研发计划课题(2016YFC0801703).

Effect of H₂O on Propagation of Laminar Syngas Flames

SHANG Rong-xue， LI Gang， ZHANG Pei-hong

School of Resource & Civil Engineering， Northeastern University， Shenyang 110819， China.

Received:2016-12-23 Revised:2016-12-23 Online:2017-10-15 Published:2017-10-13
Contact: Li Gang
About author:-
Supported by:
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摘要/Abstract

摘要： 选用Davis-机理模拟研究初始温度400K时，含有水蒸气的合成气/空气预混层流火焰传播特性.结合敏感性分析，从热力学效应、直接化学反应效应及化学三体反应效应方面详细分析水蒸气稀释作用.研究结果表明:当燃料中氢气的体积分数大于25%时，层流火焰传播速度、绝热火焰温度及重要自由基摩尔分数均随稀释剂比例的增加显著降低;在水蒸气整体稀释作用中，热力学效应起支配作用;随氢气体积分数的增加，当混合物当量比较小时，直接化学反应效应影响从促进作用发展为抑制作用;当稀释剂较少时，化学三体反应效应影响存在显著的抑制—促进—抑制作用的变化过程.

关键词: 合成气, 水蒸气, 层流火焰传播速度, 稀释作用, 三体反应效应

Abstract: The laminar flame speeds of syngas/air mixtures with H₂O dilution in the fuels were numerically studied at 400K using Davis-Mech. Based on the calculated sensitivities of mass burning rate of mixtures with various H₂O dilution ratios， the thermal， direct-reaction and third-body effects on the laminar flame speed of diluted mixtures were also carried out for an insightful understanding of the dilution effect of H₂O. The results showed that when the volume fraction of H₂ is larger than 25%， the laminar flame speed， adiabatic flame temperature and the mole fractions of the crucial radical of mixtures decrease significantly with the increase of dilution ration. The total dilution effect of H₂O was dominated by the thermal effect. When the equivalence ratio of mixture was small， the direct reaction effect caused by H₂O on the laminar flame speed was changed from promotion into inhibition with increasing volume fraction of H₂. When the amount of H₂O was limited， the third-body effect on the laminar flame speed experiences a significant inhibition-promotion-inhibiting action.

Key words: syngas, H₂O, laminar flame speed, dilution effect, third-body effect

中图分类号:

TK1211

尚融雪，李刚，张培红. 水蒸气对合成气层流火焰传播特性的影响[J]. 东北大学学报:自然科学版, 2017, 38(10): 1496-1500.

SHANG Rong-xue， LI Gang， ZHANG Pei-hong. Effect of H₂O on Propagation of Laminar Syngas Flames[J]. Journal of Northeastern University Natural Science, 2017, 38(10): 1496-1500.

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水蒸气对合成气层流火焰传播特性的影响

Effect of H₂O on Propagation of Laminar Syngas Flames

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水蒸气对合成气层流火焰传播特性的影响

Effect of H2O on Propagation of Laminar Syngas Flames

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Effect of H₂O on Propagation of Laminar Syngas Flames