Measurement of laminar burning velocities of iso-butanol-air mixtures

• 来源期刊: 科学通报(英文版)
• 学科: 工学
• 关键词: 层流燃烧速度 空气混合物 速度测定 异丁醇 火焰传播速度 初始压力 初始温度 当量比
• 年，卷（期）: 2010,（19）
• 所属期刊栏目: Engineering Thermophysics
• 页码范围: 2046-2056
• 页数: 11页
• 分类号: TQ534 TK407.9
• 语种: 英文

摘要

The laminar burning velocity of iso-butanol-air mixtures was measured under different initial pressures,initial temperatures and equivalence ratios using high-speed schlieren photography and outwardly propagation flame in a constant volume combustion bomb.Based on the analysis of stretched flame propagation speed and stretch rate,the laminar burning velocities and Markstein lengths of iso-butanol-air flames are obtained.In accordance,with photos of flame,an analysis of flame stability and the influencing factors is carried out.The results show that the laminar burning velocity is decreased with the increase of initial pressure and is increased with the increase of initial temperature.The maximum value of laminar burning velocity is presented at the equivalence ratio of 1.2.The Markstein length is decreased with the increase of equivalence ratio.For specified equivalence ratio,the Markstein length is decreased with the increase of initial temperature and initial pressure.Thus,the flame instability is increased with the increase of equivalence ratio,initial temperature and initial pressure.