Topological analysis of methane lean premixed flame in turbulent jet flow by direct numerical simulation

• 来源期刊: 科学通报(英文版)
• 学科: 物理学
• 关键词: 直接数值模拟 湍流射流 拓扑分析 预混火焰 甲烷
• 年，卷（期）: 2010,（13）
• 所属期刊栏目: ARTICLES
• 页码范围: 1231-1239
• 页数: 9页
• 分类号: O357.5 O358
• 语种: 英文

摘要

Direct numerical simulation is employed to investigate the premixed jet flame of methane in lean, combined with a detailed chemical kinetics including 17 species and 58 elemental steps and distinct Lewis numbers. Cold methane-air mixture at 0.55 equivalence ratio is injected into the coflow area with 9500 Reynolds number. The coflow ambient gas is set to be the burnt gas of the methane-air mixture in main jet and temperature is assigned to be the corresponding adiabatic flame temperature 1515 K. The whole s...