掺氢天然气层流火焰传播速度试验研究

doi:10.16265/j.cnki.issn1003-3033.2019.11.017

中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (11): 103-108.doi: 10.16265/j.cnki.issn1003-3033.2019.11.017

掺氢天然气层流火焰传播速度试验研究

尚融雪讲师, 杨悦, 高俊豪, 李刚教授

东北大学火灾&爆炸防治实验室,辽宁沈阳 110819

收稿日期:2019-08-18 修回日期:2019-10-20 发布日期:2020-10-30
作者简介:尚融雪 (1987—),女,辽宁沈阳人,博士,讲师,主要从事工业爆炸机制及防治技术方向的科研及教学工作。E-mail: rongxue.shang@foxmail.com。
基金资助:
国家自然科学基金资助(51804065);国家重点研发计划(2017YFC0804703);中国博士后科学基金资助(2018M631811);中央高校基本科研业务专项资金(N170103007)。

Experimental study on laminar flame speed of H₂/CH₄/air mixtures

SHANG Rongxue, YANG Yue, GAO Junhao, LI Gang

Fire & Explosion Protection Laboratory, Northeastern University, Liaoning Shenyang 110819, China

Received:2019-08-18 Revised:2019-10-20 Published:2020-10-30

摘要/Abstract

摘要： 为准确测量掺氢天然气层流预混火焰传播速度,并研究掺氢比对掺氢天然气层流预混火焰传播特性的影响,通过本生灯法对比试验研究自然光及纹影拍摄条件下掺氢天然气层流预混火焰的传播速度,根据化学动力学机制模拟计算并讨论不同掺氢比条件下的预混燃料层流火焰传播特性。研究表明:利用纹影系统拍摄获得的火焰传播速度更接近燃烧学定义的层流预混火焰传播速度;随着掺氢比的增加,掺氢天然气层流预混火焰传播速度及绝热火焰温度均不断增加,且层流预混火焰传播速度峰值所对应的当量比显著向富燃料侧移动;燃料中氢气组分的不断增加使得H自由基的摩尔分数以及OH自由基的生成速率均显著增加。

关键词: 层流火焰, 本生灯法, 纹影系统, 火焰边缘识别, 掺氢比, 敏感性分析

Abstract: To obtain the accurate measurement of laminar flame speed of H₂/CH₄/air mixtures, the laminar flame speeds were experimentally studied using Bunsen burner method incorporating two picture techniques of schlieren system and visible natural light system. According to the chemical dynamics mechanism, the laminar flame propagation characteristics of premixed fuel with different hydrogen fractions were simulated and calculated in order to investigate the influence of hydrogen fractions on the laminar premixed flame of H₂/CH₄/air mixtures. The results show that the method-independent laminar flame speeds of H₂/CH₄/air mixtures obtained by schlieren system are more equivalent to the laminar flame speed defined by the theory of combustion, that both the laminar flame speed and adiabatic flame temperature of H₂/CH₄/air mixtures increase with the growth of hydrogen fractions, that the equivalence ratio with the peak flame speed moves to the fuel-rich side by means of addition of hydrogen, and that with the continuous increase of hydrogen fractions, the mole fractions of vital radical H and the formation rate of OH radical rise significantly.

Key words: laminar flame, Bunsen burner, schlieren system, flame edge recognition, hydrogen fraction, sensitivity analysis

中图分类号:

X932

尚融雪, 杨悦, 高俊豪, 李刚. 掺氢天然气层流火焰传播速度试验研究[J]. 中国安全科学学报, 2019, 29(11): 103-108.

SHANG Rongxue, YANG Yue, GAO Junhao, LI Gang. Experimental study on laminar flame speed of H₂/CH₄/air mixtures[J]. China Safety Science Journal, 2019, 29(11): 103-108.

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掺氢天然气层流火焰传播速度试验研究

Experimental study on laminar flame speed of H₂/CH₄/air mixtures

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掺氢天然气层流火焰传播速度试验研究

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Experimental study on laminar flame speed of H₂/CH₄/air mixtures