...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Fuel >Probe sampling measurements and modeling of nitric oxide formation In ethane + air flames
【24h】

Probe sampling measurements and modeling of nitric oxide formation In ethane + air flames

机译：乙烷和空气火焰中一氧化氮形成的探针采样测量和建模

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

Burning velocity and probe sampling measurements of the concentrations of O_2, CO_2, CO and NO in the post-flame zone of ethane + air flames are reported. The heat flux method was used for stabilization of laminar, premixed, non-stretched flames on a perforated plate burner at 1 atm. Axial profiles of the concentrations of the major species were used to assess interaction of the flame with the burner surface and conversion of the sampling gases in the probe. Tests performed with the probes of different inlet diameters showed negligible CO-CO_2 and NO-NO_2 conversion within the experimental accuracy. Two kinetic models, the GRI-mech. 3.0 and in-house modified detailed reaction mechanism, were tested. Both kinetic mechanisms accurately reproduce laminar burning velocities and concentrations of the major species, CO, CO_2 and O_2, in these flames. Numerical predictions of the concentrations of NO in a post-flame zone of lean and stoichiometric flames are in good agreement with experiment when downstream heat losses to the environment were taken into account. The GRI-mech. 3.0 over-predicts the [NO] by about 30 ppm at the equivalence ratio of 1.4. The predictions of the in-house mechanism in rich flames are closer to the experimental data with an under-prediction of about 15 ppm. The influence of the assumed temperature gradient downstream the flame front on the calculated flame structure was also assessed.
机译：报道了乙烷+空气火焰燃烧后区域中O_2，CO_2，CO和NO浓度的燃烧速度和探针采样测量。热通量法用于在1个大气压的多孔板燃烧器上稳定层状，预混合，未拉伸的火焰。主要物质浓度的轴向分布用于评估火焰与燃烧器表面的相互作用以及探针中采样气体的转化。使用不同入口直径的探针进行的测试表明，在实验精度范围内，CO-CO_2和NO-NO_2的转化率可以忽略不计。两种动力学模型，GRI机制。测试了3.0和内部修改的详细反应机理。两种动力学机制都能准确地再现层流燃烧的速度以及这些火焰中主要物质CO，CO_2和O_2的浓度。当考虑到下游环境的热损失时，稀薄燃烧和化学计量火焰的火焰后区域中NO浓度的数值预测与实验吻合良好。 GRI机制。 3.0在1.4的当量比下高估了[NO]约30 ppm。在浓火焰中内部机理的预测更接近于实验数据，低预测约为15 ppm。还评估了假定的温度梯度在火焰锋下游对计算的火焰结构的影响。

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