西华大学学报（自然科学版）Issue(1)：79-83,5.DOI:10.3969/j.issn.1673-159X.2014.01.019
预混火焰胞状不稳定性研究
Study on Instability of Outwardly Propagating Spherical Premixed Flame
摘要
Abstract
A research on cellular instability of outwardly propagating spherical premixed flame was carried out on constant volume combustion bomb with schlieren method by using high speed camera and data acquisition .The developing process , causes and influ-ence factors of flame cellular instabilities was analyzed .The results showed that the cellular instabilities mainly included unequal diffu-sion instability and hydrodynamic instability .The cause of hydrodynamic instability was that stream lines integrated or diverged due to curvature reason , so the velocity of the flow field increases or decreased .The flame thickness and density ratio of burned to unburned zone were the main influence factors of hydrodynamic instability .The cracks and regular distortions of the flame surface was the main phenomenon .The cause of unequal diffusion instability was that thermal-mass unequal diffusion of the flame front control volume .The Lewis number was the main influence factor , and the phenomenon of unequal diffusion instability was un-regular distortions of the flame surface.关键词
定容燃烧弹/胞状不稳定性/流体力学不稳定/不等扩散不稳定Key words
constant volume combustion bomb/cellular instability/hydrodynamic instability/unequal diffusion instability分类
矿业与冶金引用本文复制引用
暴秀超,刘福水,孙作宇..预混火焰胞状不稳定性研究[J].西华大学学报（自然科学版）,2014,(1):79-83,5.基金项目
四川省教育厅自然科学重点项目（11ZA283）；“流体及动力机械”省部共建教育部重点实验室2011年学术成果培育项目（SBZDPY-11-20）；西华大学重点项目（Z1120318）。 （）
