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RISThe Effect of Ignition Procedure on Flashback of Hydrogen-Enriched Flames
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The impact of different ignition sequences on the ignition dynamics of CH4-H2 flames in a bluff body burner is investigated at atmospheric conditions. Experiments are performed over a wide range of operating conditions ...
Different Flame Patterns Linked With Swirling Injector Interactions in an Annular Combustor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Experiments in cold and reactive conditions carried out in linear arrays of injectors indicate that the flows established by neighboring injectors exhibit alternating patterns if the distance between two injectors is too ...
Stabilization Mechanisms of Swirling Premixed Flames With an Axial-Plus-Tangential Swirler
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The stabilization of premixed flames within a swirling flow produced by an axial-plus-tangential swirler is investigated in an atmospheric test rig. In this system, flames are stabilized aerodynamically away from the solid ...
Strong Azimuthal Combustion Instabilities in a Spray Annular Chamber With Intermittent Partial Blow-Off
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This article reports experiments carried out in the MICCA-spray combustor developed at EM2C laboratory. This system comprises 16 swirl spray injectors. Liquid n-heptane is injected by simplex atomizers. The combustion ...
Flame and Spray Dynamics During the Light-Round Process in an Annular System Equipped With Multiple Swirl Spray Injectors
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A successful ignition in an annular multi-injector combustor follows a sequence of steps. The first injector is ignited; two arch-shaped flame branches nearly perpendicular to the combustor backplane form; they propagate, ...
Impact of Preheating on Flame Stabilization and NOx Emissions From a Dual Swirl Hydrogen Injector
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Flame stabilization, flame structure, and pollutant emissions are investigated experimentally on a swirled injection system operating with globally lean air/hydrogen mixtures at atmospheric conditions and moderate Reynolds ...
Interplay Between Unburned Emissions and NOx Emissions From a Dual Swirl Hydrogen Air Injector
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: OH planar laser induced fluorescence (OH-PLIF) and particle image velocimetry (PIV) are employed to analyze the structure of hydrogen/air flames stabilized by a dual swirl injection system under globally lean and atmospheric ...
Characterization and Modeling of a Spinning Thermoacoustic Instability in an Annular Combustor Equipped With Multiple Matrix Injectors
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Oscillations in fully annular systems coupled by azimuthal modes are often observed in gas turbine combustors but not well documented. One objective of the present study is to characterize this type of oscillation in a ...
Impact of Heat Release Distribution on the Spinning Modes of an Annular Combustor With Multiple Matrix Burners
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The present article reports a numerical analysis of instability coupled by a spinning mode in an annular combustor. This corresponds to experiments carried out on the MICCA test facility equipped with 16 matrix burners. ...
Direct Assessment of the Acoustic Scattering Matrix of a Turbulent Swirl Combustor by Combining System Identification, Large Eddy Simulation and Analytical Approaches
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This study assesses and compares two alternative approaches to determine the acoustic scattering matrix of a premixed turbulent swirl combustor: (1) The acoustic scattering matrix coefficients are obtained directly from a ...