Results 51 to 60 of about 103,692 (197)

Convective Velocity Perturbations and Excess Gain in Flame Response as a Result of Flame-Flow Feedback

Fluids, 2022
Convective velocity perturbations (CVPs) are known to play an important role in the response of flames to acoustic perturbations and in thermoacoustic combustion instabilities.
Thomas Steinbacher, Wolfgang Polifke
doaj   +1 more source

Feedback control of oscillations in combustion and cavity flows [PDF]

, 2010
This thesis considers the control of combustion oscillations, motivated by the susceptibility of lean premixed combustion to such oscillations, and the long and expensive development and commissioning times that this is giving rise to.

core   +2 more sources

Advances and Challenges in Thermoacoustic Network Modeling for Hydrogen and Ammonia Combustors

Energies
The transition to low-carbon energy systems has heightened interest in hydrogen and ammonia as sustainable alternatives to traditional hydrocarbon fuels.
Seungmin Guk, Jaehoon Lee, Juwon Kim, Minwoo Lee   +3 more
doaj   +1 more source

LES evaluation of the effects of equivalence ratio fluctuations on the dynamic flame response in a real gas turbine combustion chamber [PDF]

, 2013
Large Eddy Simulations (LES) of a lean swirl-stabilized gas turbine burner are used to analyze mechanisms triggering combustion instabilities. To separately study the effect of velocity and equivalence ratio fluctuations, two LES of the same geometry are
Hermeth, Sebastian, Staffelbach, Gabriel, Gicquel, Laurent, Gicquel, Laurent Y.M., Poinsot, Thierry   +4 more
core   +1 more source

Application of linear hydrodynamic stability analysis to reacting swirling combustor flows

Journal of Fluid Science and Technology, 2014
This paper presents recent research activities on coherent structures in combustor flows employing linear hydrodynamic stability theory. Large-scale coherent structures play an important role in swirling combustor flows.
Christian Oliver PASCHEREIT, Steffen TERHAAR, Bernhard ĆOSIĆ, Kilian OBERLEITHNER   +3 more
doaj   +1 more source

Thermoacoustic Instability in Combustors

Annual Review of Fluid Mechanics
Thermoacoustic instability is a flow instability that arises due to a two-way coupling between acoustic waves and unsteady heat release rate. It can cause damaging, large-amplitude oscillations in the combustors of gas turbines, aeroengines, rocket engines, etc., and the transition to decarbonized fuels is likely to introduce new thermoacoustic ...
Morgans, AS, Yang, D
openaire   +2 more sources

Fundamentals, Advances, and Applications of Electrospun Nanofibrous 3D Materials

Journal of Applied Polymer Science, EarlyView.
Three‐dimensional electrospun nanofibrous systems offer unique properties and microenvironments. These properties are determined by the fabrication strategies employed and can be adjusted by the incorporation of functional additives to achieve multifunctionality for specific applications. The applications range from the biomedical to the environmental,
Rebecca Hengsbach, Viraj P. Nirwan, Altangerel Amarjargal, Zahra Asefi, Amir Fahmi   +4 more
wiley   +1 more source

Application of planar laser-induced fluorescence measurement techniques to study the heat transfer characteristics of parallel-plate heat exchangers in thermoacoustic devices [PDF]

, 2010
This paper describes the development of an experimental arrangement and the application of acetone-based planar laser-induced fluorescence (PLIF) measurement techniques to study the unsteady characteristics of heat transfer processes in the parallel ...
Artur J Jaworski, Mao, X, Jaworski, Arthur J., Shi, L, Shi, Lei, Jaworski, AJ, Xiaoan Mao, Lei Shi, Mao, Xiaoan   +8 more
core   +1 more source

A Review on Combustion Instability of Hydrogen-Enriched Marine Gas Turbines

Journal of Marine Science and Engineering
Hydrogen is widely regarded as a promising carbon-free alternative fuel. However, the development of low-emission marine gas turbine combustion systems has been hindered by the associated risks of combustion instability, also termed as thermoacoustic ...
Jiaying Cheng, Bin Hu, Zhilin Zeng, Jinhai Fu, Boyang Zhang   +4 more
doaj   +1 more source

Hydrogen‐Based Long‐Duration Energy Storage: Technologies, System Integration, and Techno‐Economic Performance

Global Challenges, Volume 10, Issue 8, August 2026.
Hydrogen‐based long‐duration energy storage (LDES) converts surplus renewable electricity into hydrogen through electrolysis, stores it using suitable storage technologies, and reconverts it into electricity, heat, or transport fuels. AI‐driven optimization, digital twins, and techno‐economic, environmental, and reliability assessments enable efficient,
Reda A. Haggam, Syed Javed, Nguyen Van Minh, Rajkumar Sivanraju, Prajith Prabhakar   +4 more
wiley   +1 more source