物理化学学报 >> 2008, Vol. 24 >> Issue (12): 2221-2228.doi: 10.3866/PKU.WHXB20081213

研究论文 上一篇    下一篇

CSP分析方法在简化燃烧化学反应系统中的应用

王彬彬, 蒋勇, 邱榕   

  1. 中国科学技术大学火灾科学国家重点实验室, 合肥 230026
  • 收稿日期:2008-06-16 修回日期:2008-09-23 发布日期:2008-12-04
  • 通讯作者: 蒋勇; 邱榕 E-mail:yjjiang@ustc.edu.cn; rqh@ustc.edu.cn

Application of CSP to the Reduction of a Complex Combustion Reaction System

WANG Bin-Bin, JIANG Yong, QIU Rong   

  1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, P. R. China
  • Received:2008-06-16 Revised:2008-09-23 Published:2008-12-04
  • Contact: JIANG Yong; QIU Rong E-mail:yjjiang@ustc.edu.cn; rqh@ustc.edu.cn

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摘要： 基于计算奇异摄动(CSP)思想, 对甲烷/空气预混燃烧系统进行分析. CSP将反应空间分裂, 消除刚性; 将单点分析和全局分析相结合, 合理选择主要组分和稳态物质, 使用CSP的特征指数简化方程. 构建了针对甲烷/空气预混燃烧系统的总包15步反应机理, 并利用Sandia实验室的PREMIX软件包对该系统进行分析, 验证了简化机理的准确性, 证实了CSP分析方法在燃烧系统中应用的可靠性和优越性, 并为研究简化燃烧系统的分析提供了一种新的思路.

关键词: 计算奇异摄动, 预混燃烧, 准稳态假设

Abstract: A numerical study based on computational singular perturbation (CSP) in a methane/air premixed combustion system was undertaken. This method splits reaction spaces to eliminate stiffness, identifies quasi-steady-state (QSS) species by analyzing CSP pointer locally and integrally as well as simplifying algebraic relations and differential equations by using two CSP indexes. Finally, a 15-step globally reduced mechanism was constructed based on CSP analyses in a premixed methane/air combustion system. The 15-step reduced mechanism was tested and verified using Sandia’s PREMIX. Advantages of the CSP method are discussed. A new method for analyzing the reduced mechanismmay be used for more complex combustion systems.

Key words: Computational singular perturbation, Premixed combustion, Quasi-steady-state assumption

MSC2000: 

  • O643