On the impact of H2-enrichment on flame structure and combustion dynamics of a lean partially-premixed turbulent swirling flame

PW Agostinelli, D Laera, I Chterev, I Boxx… - Combustion and …, 2022 - Elsevier
Abstract Large Eddy Simulation (LES) with Conjugate Heat Transfer (CHT) is used to
analyze the impact of H 2-enrichment on the flame structure and combustion dynamics of a …

Large eddy simulations of mean pressure and H2 addition effects on the stabilization and dynamics of a partially-premixed swirled-stabilized methane flame

PW Agostinelli, D Laera, I Chterev, I Boxx… - Combustion and …, 2023 - Elsevier
This work analyzes pressure and hydrogen enrichment effects on the stabilization and
combustion dynamics of a partially-premixed swirled-stabilized methane flame operated at …

Thermoacoustic instability and flame transfer function in a lean direct injection model gas turbine combustor

S Joo, S Kwak, J Lee, Y Yoon - Aerospace Science and Technology, 2021 - Elsevier
This paper discusses the combustion dynamic characteristics of hydrogen/methane flames
and the flame response to fuel flow fluctuation in a model lean-direct injection gas turbine …

Combustion instability characteristics via fuel nozzle modification in a hydrogen and natural gas Co-firing gas turbine combustor

J Jung, M Kim, J Hwang, D Kang, W Lee, H Kim… - International Journal of …, 2024 - Elsevier
In this study, three premixed swirl gas turbine nozzles with different fuel injection hole sizes
were designed to optimize combustion characteristics influenced by changes in the …

Experimental study of the effects of hydrogen addition on the thermoacoustic instability in a variable-length combustor

J Zhang, A Ratner - International journal of hydrogen energy, 2021 - Elsevier
The current study examined the self-excited thermoacoustic instability of hydrogen/methane
premixed flames using a variable-length combustor (300–1100 mm). The global dynamic …

Convective scaling of intrinsic thermo-acoustic eigenfrequencies of a premixed swirl combustor

A Albayrak, T Steinbacher… - … of Engineering for …, 2018 - asmedigitalcollection.asme.org
Spectral distributions of the sound pressure level (SPL) observed in a premixed, swirl
stabilized combustion test rig are scrutinized. Spectral peaks in the SPL for stable as well as …

Effect of flame macrostructures on thermoacoustic instabilities of hydrogen-rich fuels in turbulent bluff-body combustor

S Jatoliya, M Vadoliya, NA Baraiya, R Shah… - International Journal of …, 2024 - Elsevier
An experimental and numerical investigation is conducted on the thermo-acoustic stability of
a bluff-body turbulent combustor, considering variations in airflow rate and fuel composition …

Experimental study on the excitation of thermoacoustic instability of hydrogen-methane/air premixed flames under atmospheric and elevated pressure conditions

J Zhang, A Ratner - International Journal of Hydrogen Energy, 2019 - Elsevier
The current work examines the excitation of thermoacoustic instability of lean premixed
hydrogen-methane/air low swirl flames under both atmospheric and elevated pressure …

Experimental study of flame evolution, frequency and oscillation characteristics of steam diluted micro-mixing hydrogen flame

Z Cao, Y Lyu, J Peng, P Qiu, L Liu, C Yang, Y Yu… - Fuel, 2021 - Elsevier
Abstract Effects of steam dilution on flame evolution, frequency and oscillation
characteristics were investigated using an optically accessible micro-mixing combustor …

Combustion instability monitoring through deep-learning-based classification of sequential high-speed flame images

O Choi, J Choi, N Kim, MC Lee - Electronics, 2020 - mdpi.com
In this study, novel deep learning models based on high-speed flame images are proposed
to diagnose the combustion instability of a gas turbine. Two different network layers that can …