Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (12): 2221-2228.doi: 10.3866/PKU.WHXB20081213

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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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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