A Study of Flame-Vortex Interactions in the Presence of Residual Gases

In this work the effects of residual combustion products from a prior injection on flame extinction characteristics in a Diesel fuel pulse are investigated through a fundamental study. A numerical code with sixth-order accurate spatial discretization and multiple-step chemical kinetics is used to si...

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Bibliographic Details
Published in:Combustion science and technology 2008-07, Vol.180 (7), p.1395-1420
Main Authors: Anders, Jonathan W., Venugopal, Rishikesh, Magi, Vinicio, Abraham, John
Format: Article
Language:English
Subjects:
Applied sciences
Diesel combustion
Energy
Energy. Thermal use of fuels
Engines and turbines
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Flame extinction
Multiple-injection
Residual gases
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Summary:In this work the effects of residual combustion products from a prior injection on flame extinction characteristics in a Diesel fuel pulse are investigated through a fundamental study. A numerical code with sixth-order accurate spatial discretization and multiple-step chemical kinetics is used to simulate flame-vortex interactions under Diesel conditions in the presence of residual combustion product mixtures. The results indicate that there is a balance between the heating effect of the high-temperature combustion products that enhance flame stability and the dilution effect of the reduced oxygen concentration, which promotes extinction. These counteracting aspects of the entrained combustion products can lead to an ideal dwell time between multiple injection events for optimum benefits in flame stability.
ISSN:0010-2202
1563-521X
DOI:10.1080/00102200802049612