...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Combustion theory and modelling >The asymptotic structure of weakly strained moderately rich methane-air flames
【24h】

The asymptotic structure of weakly strained moderately rich methane-air flames

机译：弱应变的中浓甲烷-空气火焰的渐近结构

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The asymptotic structure of weakly strained moderately rich premixed methane-air flames stabilized in stagnation-point flows is analysed. In the asymptotic analysis the influence of strain on the mass flux, on the temperature and the concentration of chemical species in the flame is treated as a perturbation from their values in the corresponding unstrained flame. Perturbation analysis is carried out to the first order. The deviation of the mass burning rate in the strained flame from the mass burning rate in the corresponding unstrained flame is obtained in terms of the Markstein number. Chemical reactions taking place in the flame are described by a reduced chemical-kinetic mechanism made up of four global steps. The analysis gives a sufficient number of equations from which the Markstein numbers can be calculated. Numerical calculations are performed using a chemical-kinetic mechanism made up of elementary reactions. Markstein numbers are obtained and they are found to agree reasonably well with those calculated using the results of an asymptotic analysis. Markstein numbers are also found to agree reasonably well with those deduced from experiments. An interesting finding of the present study is that the Markstein number for moderately rich flames depends on the Lewis number of both fuel and oxygen.
机译：分析了稳定在停滞点流中的弱应变中浓预混合甲烷-空气火焰的渐近结构。在渐近分析中，应变对质量通量，温度和火焰中化学物质浓度的影响被视为对相应未应变火焰中其值的扰动。扰动分析进行到一阶。根据马克斯坦数获得应变火焰中的质量燃烧速率与相应的非应变火焰中的质量燃烧速率的偏差。火焰中发生的化学反应由减少的化学动力学机制描述，该机理由四个全局步骤组成。分析给出了足够多的方程式，可以从这些方程式计算出马克斯坦数。使用由基本反应组成的化学动力学机制进行数值计算。获得了马克斯坦数，发现它们与使用渐近分析结果计算出的数值相当吻合。还发现马克斯坦数与实验得出的数字相当吻合。本研究的一个有趣发现是中等浓烈火焰的马克斯坦数取决于燃料和氧气的路易斯数。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号