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Journal of Mechanical Science and Technology

, Volume 26, Issue 4, pp 1205–1212 | Cite as

Improvement and experimental validation of a multi-zone model for combustion and NO emissions in CNG fueled spark ignition engine

  • Omid AsgariEmail author
  • Siamak Kazemzadeh Hannani
  • Reza Ebrahimi
Article

Abstract

This article reports the experimental and theoretical results for a spark ignition engine working with compressed natural gas as a fuel. The theoretical part of this work uses a zero-dimensional, multi-zone combustion model in order to predict nitric oxide (NO) emission in a spark ignition (SI) engine. The basic concept of the model is the division of the burned gas into several distinct zones for taking into account the temperature stratification of the burned mixture during combustion. This is especially important for accurate NO emissions predictions, since NO formation is strongly temperature dependent. During combustion, 12 products are obtained by chemical equilibrium via Gibbs energy minimization method and nitric oxide formation is calculated from chemical kinetic by the extended Zeldovich mechanism. The burning rate required as input to the model is expressed as a Wiebe function, fitted to experimentally derived burn rates. The model is validated against experimental data from a four-cylinder, four-stroke, SI gas engine (EF7) running with CNG fuel. The calculated values for pressure and nitric oxide emissions show good agreement with the experimental data. The superiority of the multizone model over its two-zone counterpart is demonstrated in view of its more realistic in-cylinder NO emissions predictions when compared to the available experimental data.

Keywords

Multi-zone combustion model Spark ignition engine Gibbs energy minimization CNG Nitric oxide 

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References

  1. [1]
    J. B. Heywood, J. M. Higgins, P. A. Watts and R. J. Tabaczynski, Development and use of a cycle simulation to predict SI engine efficiency and NOx emissions, Society of Automotive Engineers, SAE (1979) 790291.Google Scholar
  2. [2]
    P. N. Blumberg, G. A. Laovie and R. J. Tabaczynski, Phenomenological Models for reciprocating internal combustion engines, Progress in Energy and Combustion Science, 5(2) (1979) 123–167.CrossRefGoogle Scholar
  3. [3]
    G. Laovie and P. Blumberg, A Fundamental Model for Predicting Fuel Consumption, NOx and HC Emissions of the Conventional Spark-Ignited Engine, Combustion Science and Technology, 21(5–6) (1980) 225–258.CrossRefGoogle Scholar
  4. [4]
    E. H. James, Errors in NO emission prediction from spark ignition engine, SAE (1982) 820046.Google Scholar
  5. [5]
    R. Miller, G. Davis, C. Newman and T. Gardner, A super extended Zeldovich for NOx modeling and engine calibration, Society of Automotive Engineers, SAE (1998) 980781.Google Scholar
  6. [6]
    M. Rublewski and J. B. Heywood, Modeling NO formation in SI engines with a layered adiabatic core and combustion efficiency routine, Society of Automotive Engineers, SAE (2001).Google Scholar
  7. [7]
    R. R. Raine and C. R. Stone, Modeling of nitric oxide formation in spark ignition engines with a multizone burned gas, Combustion and Flame, 102(3) (1995) 241–255.CrossRefGoogle Scholar
  8. [8]
    J. A. Caton, A multiple-zone cycle simulation for spark-ignition engines: Thermodynamic details, in large-bore engines, fuel effects, homogenous charge compression ignition, engine performance and simulation, proceedings of the 2001 fall technical conference, ed. V. W. Wong, the ASME Internal Combustion Engine Division (2001) 41–58.Google Scholar
  9. [9]
    J. A. Caton, Extension of a thermodynamic cycle simulation to include computations of nitric oxide emissions for spark ignition engines, Report no. ERL-2002-01, Engine Research Laboratory, Department of Mechanical Engineering, Texas A & M University (2002).Google Scholar
  10. [10]
    K. Kannan and M. Udayakumar, Modeling of nitric oxide formation in single cylinder direct injection diesel engine using diesel-water emulsion, American Journal of Applied Sciences, 6(7) (2009) 1313–1320.CrossRefGoogle Scholar
  11. [11]
    J. B. Heywood, Internal combustion engine fundamentals, New York, McGraw-Hill (1988).Google Scholar
  12. [12]
    S. Gordon and B. J. McBride, Computer program for the calculation of complex chemical equilibrium compositions with applications: I. analysis, NASA Reference Publication 1311 (1994).Google Scholar
  13. [13]
    G. M. Rassweiler and L. Withrow, Motion pictures of engine flames correlated with pressure cards, SAE (1980) 800131.Google Scholar
  14. [14]
    J. B. Heywood, J. M. Higgins, P. A. Watts and R. J. Tabaczynski, Development and use of a cycle simulation to predict SI engine efficiency and NOx emission, SAE (1979) 790291.Google Scholar
  15. [15]
    W. JD. Annand, Heat transfer in the cylinders of reciprocating internal combustion engines, Proc Inst Mech Eng, 177 (1963) 973–90.CrossRefGoogle Scholar
  16. [16]
    C. R. Ferguson, Internal combustion engines, New York, Wiley (1986).Google Scholar
  17. [17]
    G. L. Borman and K. W. Ragland, Combustion engineering, McGraw-Hill (1998).Google Scholar
  18. [18]
    R. Stone, Introduction to internal combustion engines, Macmillan Press Limited, Basingstoke, Hampshire (1999) 430–431.Google Scholar

Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Omid Asgari
    • 1
    Email author
  • Siamak Kazemzadeh Hannani
    • 1
  • Reza Ebrahimi
    • 2
  1. 1.Mechanical EngineeringSharif University of TechnologyTehranIran
  2. 2.Mechanical EngineeringKNTU University of TechnologyTehranIran

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