Effects of swirl turbulent flow field and stratified concentration field on combustion of fuel-air mixture in a constant volume vessel (2nd report, effects of concentration field and turbulence flow field on combustion characteristics)

Atsushi Nishiyama, Eiji Tomita, Nobuyuki Kawahara, Sadami Yoshiyama, Yoshisuke Hamamoto

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A swirling flow and rich fuel concentration near the center were produced in a vessel by tangentially charging air and fuel injection. Propane was used as fuel. Fuel concentration distribution was measured with laser induced fluorescence (LIF) method using acetone as a tracer. It was confirmed that the center-rich stratified fuel concentration was produced. In order to estimate the pattern of the fuel concentration field, the Gaussian fitting method was applied to the equivalence ratio profile. Fuel distribution history obtained from LIF measurement agreed with the calculation result using axisymmetric diffusion equation. The initial stage of combustion was greatly affected by the fuel concentration distribution in the vicinity of the spark location. The stronger turbulence intensity accelerated combustion and main combustion became shorter under the same fuel distribution conditions.

Original languageEnglish
Pages (from-to)1092-1099
Number of pages8
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume70
Issue number692
DOIs
Publication statusPublished - Apr 2004

Keywords

  • Combustion
  • Flame Propagation
  • Gasoline Engine
  • Internal Combustion Engine
  • LIF
  • Laser Diagnostics
  • Premixed Combustion
  • Stratified Charge
  • Swirling Flow

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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