Intrinsic thermoacoustic instabilities

CF Silva - Progress in Energy and Combustion Science, 2023 - Elsevier
It is accepted that the thermoacoustic behavior of a given combustion system can be
analyzed by investigating how its natural acoustic modes are perturbed by the flame …

EPIC: An energy-efficient, high-performance GPGPU computing research infrastructure

M Själander, M Jahre, G Tufte, N Reissmann - arXiv preprint arXiv …, 2019 - arxiv.org
The pursuit of many research questions requires massive computational resources. State-of-
the-art research in physical processes using simulations, the training of neural networks for …

[HTML][HTML] Computation and prediction of intrinsic thermoacoustic oscillations associated with autoignition fronts

HS Gopalakrishnan, A Gruber, JP Moeck - Combustion and Flame, 2023 - Elsevier
A sequential combustor architecture consists of two longitudinally staged combustion zones
featuring a propagation-stabilized flame in the first stage and an autoignition-stabilized …

Mutual synchronization and flame dynamics in an axially fuel-staged lean-premixed combustion system

Y Guan, Y Choi, P Liu, KT Kim - Proceedings of the Combustion Institute, 2024 - Elsevier
We experimentally study the acoustic coupling direction between two stages and the flame-
acoustic interaction within and across stages in an axially fuel-staged lean-premixed …

[HTML][HTML] Flame transfer function measurements of hydrogen-enriched reheat flames

F Franke, M Bothien, T Sattelmayer - Combustion and Flame, 2025 - Elsevier
This study experimentally investigates the dynamic behavior of hydrogen-natural gas reheat
flames, which are stabilized by both flame propagation and autoignition. Measurements are …

Computation of intrinsic instability and sound generation from auto-ignition fronts

HS Gopalakrishnan, A Gruber… - … of Engineering for …, 2023 - asmedigitalcollection.asme.org
Burning carbon-free fuels such as hydrogen in gas turbines promise power generation with
minimal emissions of greenhouse gases. A two-stage sequential combustor architecture …

High-frequency mode shape dependent flame-acoustic interactions in reheat flames

J McClure, M Bothien… - … of Engineering for …, 2023 - asmedigitalcollection.asme.org
Gas turbines featuring sequentially staged combustion systems offer excellent performance
in terms of fuel flexibility, part load performance and combined-cycle efficiency. These reheat …

Autoignition delay modulation by high-frequency thermoacoustic oscillations in reheat flames

J McClure, M Bothien, T Sattelmayer - Proceedings of the Combustion …, 2023 - Elsevier
This paper investigates the sensitivity of the autoignition delay in reheat flames to acoustic
pulsations associated with high-frequency transverse thermoacoustic oscillations. A reduced …

A numerical investigation of reheat hydrogen combustion in a simplified geometrical configuration from atmospheric pressure to full load conditions

A Gruber, T Heggset… - … Expo: Power for …, 2022 - asmedigitalcollection.asme.org
An increasing amount of recent experimental evidence indicates that sequential combustion
is particularly well-suited for burning highly-reactive fuels like hydrogen, while maintaining …

Intrinsic Thermoacoustic Feedback in Auto-Ignition Flames Stabilized in a Converging-Diverging Nozzle

F Biagioli, KJ Syed - … : Power for Land, Sea, and Air, 2024 - asmedigitalcollection.asme.org
Intrinsic thermoacoustic modes are studied in the case of self-igniting flames stabilised in the
diverging section of a converging-diverging nozzle with Mach number in the range M= 0.6 …