NDLI: Development of a Model for Auto-Ignition Delays and its Use for the Prediction of Premix Combustion Reliability

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Bounaceur, Roda Glaude, Pierre-Alexandre Sirjean, Baptiste Fournet, René Montagne, Pierre Vierling, Matthieu Molière, Michel
Copyright Year	2016
Abstract	Except in diesel engine applications, auto-ignition is an unwanted event from a general safety and reliability standpoint. It is especially undesirable in the premixing process involved in most low NOx combustion technologies. Therefore, in addition to auto-ignition temperature, autoignition delay (AID) is a key data for the design of modern combustors including gas turbine ones. The authors have investigated the detailed kinetic mechanisms leading to autoignition and established practical AID correlations involving the fuel composition, its temperature, pressure and equivalence ratio. The correlations brought about during this program offer a good reconciliation between calculated and experimental AID through a wide range of fuel composition, initial temperature and pressure. Validations were mainly done against data acquired with experimental setups consisting in shock tubes and rapid compression machines. The auto-ignition delay times of methane, pure light alkanes and various blends representative of several natural gas and process-derived fuels have been reviewed. For each fuel mixture, this study procures a simple equation linking the auto-ignition delay time to the temperature, pressure and equivalence ratio. As a direct application of this work, the authors have evaluated the risk of auto ignition in the premixing zone of a combustor characterized by a residence time and an associated probability density function. The results of this simulation stress the key role of larger hydrocarbon in the risk of flash-back events.
Sponsorship	International Gas Turbine Institute
File Format	PDF
ISBN	9780791849767
DOI	10.1115/GT2016-57585
Volume Number	Volume 4B: Combustion, Fuels and Emissions
Conference Proceedings	ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition
Language	English
Publisher Date	2016-06-13
Publisher Place	Seoul, South Korea
Access Restriction	Subscribed
Subject Keyword	Methane Temperature Compression Ignition Probability Risk Combustion Fuels Pressure Density Machinery Stress Design Gas turbines Diesel engines Simulation Nitrogen oxides Shock tubes Delays Safety Reliability Combustion chambers Combustion technologies Natural gas
Content Type	Text
Resource Type	Article

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