物理化学学报 >> 2009, Vol. 25 >> Issue (08): 1618-1622.doi: 10.3866/PKU.WHXB20090809

研究论文 上一篇    下一篇

空气污染组分H2O和CO2对乙烯燃烧性能的影响

刘伟雄, 杨阳, 邵菊香, 宋文艳, 李象远, 乐嘉陵   

  1. 中国空气动力研究与发展中心, 四川 绵阳 621000|四川大学化工学院, 成都 610065|西北工业大学动力与能源学院, 西安 710072
  • 收稿日期:2009-04-13 修回日期:2009-05-16 发布日期:2009-07-16
  • 通讯作者: 刘伟雄, 李象远 E-mail:lwx_29@126.com; xyli@scu.edu.cn

Influence of H2O and CO2 Contamination in Air on the Combustion Properties of Ethylene

LIU Wei-Xiong, YANG Yang, SHAO Ju-Xiang, SONG Wen-Yan, LI Xiang-Yuan, LE Jia-Ling   

  1. China Aerodynamics Research &Development Center, Mianyang 621000, Sichuan Province, P. R. China|College of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China|School of Power and Energy, Northwest Polytechnical University, Xi'an 710072, P. R. China
  • Received:2009-04-13 Revised:2009-05-16 Published:2009-07-16
  • Contact: LIU Wei-Xiong, LI Xiang-Yuan E-mail:lwx_29@126.com; xyli@scu.edu.cn

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摘要：

超燃冲压发动机在高空工作时, 以高温高速纯净空气作氧化剂使燃料燃烧. 但在地面实验中, 高温空气往往通过燃烧加热方式获得, 从而使空气包含了H2O和CO2污染组分. 本文用电阻加热来流空气并添加污染组分的方法, 研究了燃烧室模型中乙烯的燃烧状态和壁面压力受污染组分的影响. 用化学反应动力学模拟的方法, 在绝热刚性反应器模型中用H2O和CO2取代空气中的N2, 研究了污染组分对点火延迟和燃烧温度的影响, 并从链反应机理的角度讨论了实验和动力学模拟结果.

关键词: 动力学模拟, 乙烯燃烧, 污染组分, 超燃冲压发动机

Abstract:

Clean air at high temperature and velocity acts as oxidant for fuel combustion in a hypersonic scramjet. In ground tests, however, high temperature air produced by combustion heating contains H2O and CO2 contaminants. In this study, the effects of contamination on the properties and wall pressure of a combustion chamber during C2H4 combustion was investigated. Clean air was heated via electric resistance and water vapor and carbon dioxide gas were added to simulate vitiated air. Through comparative experiments between clean air and vitiated air, effects such as the stability of the flame and the wall pressure inside the combustion chamber on the contamination during the combustion of ethylene were evaluated. Furthermore, the impacts of H2O and CO2 in air upon ignition delay and combustion temperature were simulated by assuming a rigid and adiabatic reactor. Results from both experiment and kinetics modeling are discussed by considering the chain reaction mechanism.

Key words: Kinetics simulation, Combustion of ethylene, Contaminant, Scramjet