A PDF method for multidimensional modeling of HCCI engine combustion: Effects of turbulence/chemistry interactions on ignition timing and emissions

Y. Z. Zhang, E. H. Kung, D. C. Haworth

Research output: Contribution to conferencePaper

2 Scopus citations

Abstract

In the limit of homogeneous reactants and adiabatic combustion, ignition timing and pollutant emissions in homogeneous-charge compression-ignition (HCCI) engines would be governed solely by chemical kinetics. The influence of turbulence/chemistry interactions (TCI) on auto-ignition and emissions of CO and unburned hydrocarbon (UHC) was examined using a three-dimensional time-dependent computational fluid dynamics (CFD) model that includes detailed chemical kinetics. For low-swirl nearly homogeneous conditions and no top-ring-land crevice (TRLC), TCI had little effect on ignition timing; however, even in that case the influence of TCI on emissions was not negligible. With increasing swirl, higher degrees of mixture in-homogeneity, and for cases that include a TRLC, TCI effects became increasingly important and resulted in significant changes in ignition timing and emissions. Unburned fuel was a non-negligible contribution to UHC for high swirl and in cases where a TRLC was considered. The work also demonstrated the feasibility of bring transported probability density function methods to bear in modeling a geometrically complex three-dimensional time-dependent turbulent combustion system. This is an abstract of a paper presented at the 30th International Symposium on Combustion (Chicago, IL 7/25-30/2004).

Original languageEnglish (US)
Pages16-17
Number of pages2
StatePublished - Jan 1 2004
Event30th International Symposium on Combustion, Abstracts of Symposium Papers - Chicago, IL, United States
Duration: Jul 25 2004Jul 30 2004

Other

Other30th International Symposium on Combustion, Abstracts of Symposium Papers
CountryUnited States
CityChicago, IL
Period7/25/047/30/04

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Fingerprint Dive into the research topics of 'A PDF method for multidimensional modeling of HCCI engine combustion: Effects of turbulence/chemistry interactions on ignition timing and emissions'. Together they form a unique fingerprint.

  • Cite this

    Zhang, Y. Z., Kung, E. H., & Haworth, D. C. (2004). A PDF method for multidimensional modeling of HCCI engine combustion: Effects of turbulence/chemistry interactions on ignition timing and emissions. 16-17. Paper presented at 30th International Symposium on Combustion, Abstracts of Symposium Papers, Chicago, IL, United States.