已收录 273081 条政策
 政策提纲
  • 暂无提纲
Development of a Dual-Pump CARS System for Measurements in a Supersonic Combusting Free Jet
[摘要] This work describes the development of a dual-pump CARS system for simultaneous measurements of temperature and absolute mole fraction of N2, O2 and H2 in a laboratory scale supersonic combusting free jet. Changes to the experimental set-up and the data analysis to improve the quality of the measurements in this turbulent, high-temperature reacting flow are described. The accuracy and precision of the instrument have been determined using data collected in a Hencken burner flame. For temperature above 800 K, errors in absolute mole fraction are within 1.5, 0.5, and 1% of the total composition for N2, O2 and H2, respectively. Estimated standard deviations based on 500 single shots are between 10 and 65 K for the temperature, between 0.5 and 1.7% of the total composition for O2, and between 1.5 and 3.4% for N2. The standard deviation of H2 is ~10% of the average measured mole fraction. Results obtained in the jet with and without combustion are illustrated, and the capabilities and limitations of the dual-pump CARS instrument discussed.
[发布日期] 2012-01-09 [发布机构] 
[效力级别]  [学科分类] 力学,机械学
[关键词]  [时效性] 
   浏览次数:17      统一登录查看全文      激活码登录查看全文