A study of the turbulent jet flow field in a methane fueled turbulent jet ignition (TJI) system

Masumeh Gholamisheeri, Indrek S. Wichman, Elisa Toulson

Research output: Contribution to journalArticle

  • 7 Citations

Abstract

This paper analytically and computationally examines the transient jet used to ignite combustible mixtures during Turbulent Jet Ignition (TJI). In TJI the ignition source, which originates in the prechamber, enters through a connecting nozzle into the main chamber as a transient high temperature jet of reacted mixture, reacting mixture and active radicals. A Computational Fluid Dynamics (CFD) model is developed for the flow field, density gradients, turbulence intensity, and temperature fields in both the prechamber and the main chamber. None of these quantities are currently measurable. The pressure traces computed using four (4) comprehensive chemical kinetic mechanisms (San Diego, Aramco, GRI, and, NUI) and one (1) reduced chemical kinetic mechanism are compared with the experimental pressure data. Results indicate that none of the mechanisms are in complete agreement, however they are in good agreement with the experimental burn rate, peak pressure and ignition delay predictions. Comparison is made of the simulations with high speed chemiluminescence images of combustion and measured pressure traces in a Rapid Compression Machine (RCM). The influences of nozzle size and mixture stoichiometry on jet penetration speed and combustion performance are investigated. Normalized transient results are presented that produce good agreement between the various classes of model predictions. A discussion is provided of a new correlation model for the transient TJI process.

LanguageEnglish (US)
Pages194-206
Number of pages13
JournalCombustion and Flame
Volume183
DOIs
StatePublished - Sep 1 2017

Profile

ignition systems
Ignition systems
turbulent jets
jet flow
Methane
ignition
Flow fields
flow distribution
methane
Ignition
nozzles
reaction kinetics
Reaction kinetics
chambers
Nozzles
chemiluminescence
computational fluid dynamics
predictions
Chemiluminescence
dynamic models

Keywords

  • Combustion visualization
  • Turbulent jet ignition

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Physics and Astronomy(all)

Cite this

A study of the turbulent jet flow field in a methane fueled turbulent jet ignition (TJI) system. / Gholamisheeri, Masumeh; Wichman, Indrek S.; Toulson, Elisa.

In: Combustion and Flame, Vol. 183, 01.09.2017, p. 194-206.

Research output: Contribution to journalArticle

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