☆ 4.7 Article

Influence of pilot H 2 injection on methane-air swirled flame stabilization and acoustic response

COMBUSTION AND FLAME (2023)

Related references

Note: Only part of the references are listed.

Article Thermodynamics

Influence of hydrogen content and injection scheme on the describing function of swirled flames

T. Schuller et al.

Summary: The dynamics of hydrogen-enriched V-shape swirled lean premixed methane/air flames are investigated for different injection schemes. It is found that the response of the flames varies significantly depending on whether hydrogen is premixed with the main flow or injected pure as a pilot jet. The flame behavior is found to be influenced by the reactivity of the hydrogen-enriched mixture and the distribution of heat release along the flame brush.

COMBUSTION AND FLAME (2022)

Add to Collection

Article Chemistry, Physical

Effects of hydrogen addition on the forced response of H2/CH4 flames in a dual-nozzle swirl-stabilized combustor

Sanghyeok Kwak et al.

Summary: The effects of hydrogen addition on the forced response of H-2/CH4 flames in a dual-nozzle swirl-stabilized combustor are analyzed. The study shows that the flame transfer function (FTF) characteristics are determined by the change in flame angle and the flame roll-up phenomenon, with the latter playing a more important role. In addition, hydrogen addition attenuates the local maximum gains and decreases the FTF phase slope. These differences are primarily attributed to the change in flame roll-up behavior induced by a short and compact flame distribution at high hydrogen contents.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2022)

Add to Collection

Article Thermodynamics

The influence of hydrogen on the stability of a perfectly premixed combustor

Jose G. Aguilar et al.

Summary: The experimental results show that as the hydrogen content increases, the flame shape changes to maintain the stability of the system, and a bi-stable region exists for certain mixture ratios. Both the flame model and linear stability analysis yield conclusions consistent with the experimental observations.

COMBUSTION AND FLAME (2022)

Add to Collection

Article Chemistry, Physical

Hydrogen substitution of natural-gas in premixed burners and implications for blow-off and flashback limits

A. Aniello et al.

Summary: This study investigates the effects of hydrogen addition on the stability and flashback occurrence of two different multi-perforated premixed burners designed for natural gas. The results show that hydrogen addition increases the blow off resistance of the burners, but also raises the risk of flashback. It is found that the occurrence of flashback is closely related to the surface temperature of the burners.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2022)

Add to Collection

Article Thermodynamics

Dual-fuel, dual-swirl burner for the mitigation of thermoacoustic instabilities in turbulent ammonia-hydrogen flames

Amit Katoch et al.

Summary: In this study, a novel dual-fuel, dual-swirl burner is introduced, and its potential to mitigate thermoacoustic coupling for ammonia-hydrogen-air flames is explored. The researchers found that by adjusting the extent of mixing between ammonia and hydrogen before injection into the combustion chamber, the flame morphology and thermoacoustic behavior can be modified.

COMBUSTION AND FLAME (2022)

Add to Collection

Article Thermodynamics

Control of intrinsic thermoacoustic instabilities using hydrogen fuel

Abdulla Ghani et al.

Summary: This conceptual numerical study explores a possible strategy for controlling unstable intrinsic thermoacoustic (ITA) modes through incremental addition of hydrogen fuel and investigates the impact on the stability of a laminar slit flame using various approaches. The study utilizes chemical kinetics solver, DNS, and acoustic network model to estimate ITA frequencies, compute Flame Transfer Function (FTF), and predict stability limits, showing good agreement with DNS data and allowing modeling of the impact of hydrogen on combustor stability.

PROCEEDINGS OF THE COMBUSTION INSTITUTE (2021)

Add to Collection

Article Thermodynamics

Stabilization mechanisms of CH4 premixed swirled flame enriched with a non-premixed hydrogen injection

D. Laera et al.

Summary: High-fidelity Large Eddy Simulations (LES) were used to study the impact of hydrogen injection on a lean turbulent CH4/Air premixed flame, with an Analytically Reduced Chemistry (ARC) mechanism and different transport modeling strategies. The results showed large variations in mixture properties and flame structure, highlighting the importance of using complex transport properties in LES involving hydrogen combustion.

PROCEEDINGS OF THE COMBUSTION INSTITUTE (2021)

Add to Collection

Article Engineering, Mechanical

Effect of Hydrogen on Steady-State and Transient Combustion Instability Characteristics

John Strollo et al.

Summary: This study investigates the effects of hydrogen enrichment on thermoacoustic instability in a model gas turbine combustor, finding that higher levels of hydrogen and heat rate can lead to unstable combustion processes. The results have implications for systems experiencing variations in fuel composition, with particular relevance to the use of hydrogen as a renewable fuel source.

JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME (2021)

Add to Collection

Article Thermodynamics

Effect of hydrogen enrichment on the dynamics of a lean technically premixed elevated pressure flame

Ianko Chterev et al.

Summary: The study investigates the combustion characteristics, flow dynamics, and thermoacoustic amplitude of hydrogen enriched natural gas, with findings revealing that H2 enrichment affects flame length, combustion instability frequency, and decreases the energy of the precessing vortex core.

COMBUSTION AND FLAME (2021)

Add to Collection

Article Thermodynamics

The effect of hydrogen addition on the amplitude and harmonic response of azimuthal instabilities in a pressurized annular combustor

Thomas Indlekofer et al.

Summary: This study introduces an annular combustion chamber operated at intermediate pressures with CH4-H2 blends, leading to various combustion instabilities. Higher hydrogen content can result in high-amplitude instabilities with significant pressure amplitude contributions, including higher order harmonics. The harmonic response is amplitude dependent with a quadratic relationship between harmonic components of pressure amplitudes.

COMBUSTION AND FLAME (2021)

Add to Collection

Article Chemistry, Physical

The effect of hydrogen enrichment on the forced response of CH4/H2/Air laminar flames

Zhengli Lim et al.

Summary: Hydrogen-enrichment shifts the FDF gain drop-off to higher frequencies, increasing propensity to thermoacoustic instability and reducing the effective flame time delay. Sensitivity analyses showed that changes in FDF were predominantly driven by flame burning speed and insensitive to changes in Markstein length.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

Add to Collection

Article Thermodynamics

Suppression of instabilities of swirled premixed flames with minimal secondary hydrogen injection

Gorkem Oztarlik et al.

COMBUSTION AND FLAME (2020)

Add to Collection

Article Thermodynamics

Scaling and prediction of transfer functions in lean premixed H2/CH4-flames

Eirik Aesoy et al.

COMBUSTION AND FLAME (2020)

Add to Collection

Article Mechanics

Dynamics and control of premixed combustion systems based on flame transfer and describing functions

Thierry Schuller et al.

JOURNAL OF FLUID MECHANICS (2020)

Add to Collection

Article Thermodynamics

Impact of swirl and bluff-body on the transfer function of premixed flames

M. Gatti et al.

PROCEEDINGS OF THE COMBUSTION INSTITUTE (2019)

Add to Collection

Article Engineering, Mechanical

Toward Decarbonized Power Generation With Gas Turbines by Using Sequential Combustion for Burning Hydrogen

Mirko R. Bothien et al.

JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME (2019)

Add to Collection

Article Thermodynamics

Chemiluminescence of Burner-Stabilized Premixed Laminar Flames

Y. Ding et al.

COMBUSTION SCIENCE AND TECHNOLOGY (2019)

Add to Collection

Review Thermodynamics

Prediction and control of combustion instabilities in real engines

T. Poinsot

PROCEEDINGS OF THE COMBUSTION INSTITUTE (2017)

Add to Collection

Article Thermodynamics

Impact of heat loss and hydrogen enrichment on the shape of confined swirling flames

T. F. Guiberti et al.

PROCEEDINGS OF THE COMBUSTION INSTITUTE (2015)

Add to Collection

Review Thermodynamics

Recent advances in understanding of flammability characteristics of hydrogen

Antonio L. Sanchez et al.

PROGRESS IN ENERGY AND COMBUSTION SCIENCE (2014)

Add to Collection

Article Thermodynamics

Self-induced unstable behaviors of CH4 and H2/CH4 flames in a model combustor with a low-swirl injector

P. L. Therkelsen et al.

COMBUSTION AND FLAME (2013)

Add to Collection

Article Thermodynamics

Effects of hydrogen on the thermo-acoustics coupling mechanisms of low-swirl injector flames in a model gas turbine combustor

D. W. Davis et al.

PROCEEDINGS OF THE COMBUSTION INSTITUTE (2013)

Add to Collection

Article Thermodynamics

EFFECTS OF NONUNIFORM REACTANT STOICHIOMETRY ON THERMOACOUSTIC INSTABILITY IN A LEAN-PREMIXED GAS TURBINE COMBUSTOR

K. T. Kim et al.

COMBUSTION SCIENCE AND TECHNOLOGY (2012)

Add to Collection

Article Mechanics

Density ratio effects on reacting bluff-body flow field characteristics

Benjamin Emerson et al.

JOURNAL OF FLUID MECHANICS (2012)

Add to Collection

Article Mechanics

Acoustically perturbed turbulent premixed swirling flames

P. Palies et al.

PHYSICS OF FLUIDS (2011)

Add to Collection

Article Energy & Fuels

Effects of hydrogen addition on flame structure and forced flame response to velocity modulation in a turbulent lean premixed combustor

Daesik Kim et al.

FUEL (2010)

Add to Collection

Article Mechanics

Dynamic mode decomposition of numerical and experimental data

Peter J. Schmid

JOURNAL OF FLUID MECHANICS (2010)

Add to Collection

Article Chemistry, Physical

Hydrogen addition effects in a confined swirl-stabilized methane-air flame

Han S. Kim et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2009)

Add to Collection

Article Thermodynamics

Control of combustion instabilities by local injection of hydrogen

Severine Barbosa et al.

PROCEEDINGS OF THE COMBUSTION INSTITUTE (2007)

Add to Collection

Article Thermodynamics

Bifurcation of flame structure in a lean-premixed swirl-stabilized combustor: transition from stable to unstable flame

Y Huang et al.

COMBUSTION AND FLAME (2004)

Add to Collection

Article Thermodynamics

Influence of H2 on the response of lean premixed CH4 flames to high strained flows

GS Jackson et al.

COMBUSTION AND FLAME (2003)

Add to Collection

Article Thermodynamics

Combustion of hydrogen-enriched methane in a lean premixed swirl-stabilized burner

RW Schefer et al.

PROCEEDINGS OF THE COMBUSTION INSTITUTE (2002)

Add to Collection

Article Thermodynamics

Flame/stretch interactions of premixed hydrogen-fueled flames: Measurements and predictions

OC Kwon et al.

COMBUSTION AND FLAME (2001)

Add to Collection

© Peeref 2019-2024. All rights reserved.