初始温度和初始压力对甲烷-甲醇裂解气预混层流燃烧特性的影响

doi:10.13229/j.cnki.jdxbgxb20170847

摘要/Abstract

摘要： 利用定容燃烧弹试验系统,研究了不同初始温度、初始压力、甲醇裂解气添加比例和当量比对甲烷-甲醇裂解气预混层流燃烧速度和火焰的胞状不稳定性的影响,并在相同工况下进行了甲烷-一氧化碳混合燃料的试验,用以探究一氧化碳在甲醇裂解气中的作用。研究结果表明,甲烷-甲醇裂解气混合燃料的层流燃烧速度随着温度和甲醇裂解气添加比例的升高而增大,随压力的升高而降低;提高初始压力对热扩散不稳定性几乎没有影响,主要是由于火焰厚度减少使流体动力学不稳定性增强,从而导致火焰的胞状不稳定性增强。

关键词: 动力机械工程, 甲烷-甲醇裂解气混合燃料, 层流燃烧速度, 火焰的胞状不稳定性

Abstract: Experiments were conducted in a constant-volume combustion chamber system to study the laminar burning velocity and flame cellular instability of methane with dissociated methanol at different temperatures, pressures, dissociated methanol fractions, equivalence ratio. Experiments were also done to methane with carbon monoxide in the same conditions. The results show that the laminar burning velocity increases with the temperature and dissociated methanol fraction, while decreases with the increase in pressure. With the increase in pressure, hydrodynamic effect caused by significant reduction of the flame thickness plays an important role in the flame cellular instability.

Key words: power machinery and engineering, methane-dissociated methanol fuel, laminar burning velocity, flame cellular instability

中图分类号:

TK464

秦静, 徐鹤, 裴毅强, 左子农, 卢莉莉. 初始温度和初始压力对甲烷-甲醇裂解气预混层流燃烧特性的影响[J]. 吉林大学学报(工学版), 2018, 48(5): 1475-1482.

QIN Jing, XU He, PEI Yi-qiang, ZUO Zi-nong, LU Li-li. Influence of initial temperature and initial pressure on premixed laminar burning characteristics of methane-dissociated methanol flames[J]. Journal of Jilin University(Engineering and Technology Edition), 2018, 48(5): 1475-1482.

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