Nonlinear hydrodynamic and thermoacoustic oscillations of a bluff-body stabilised turbulent premixed flame [PDF]
, 2016 Turbulent premixed flames often experience thermoacoustic instabilities when the combustion heat release rate is in phase with acoustic pressure fluctuations.
Cant, RS, Juniper, MP, Lee, CY, Li, LKB
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Progress Toward Affordable High Fidelity Combustion Simulations Using Filtered Density Functions for Hypersonic Flows in Complex Geometries [PDF]
, 2012 Significant progress has been made in the development of subgrid scale (SGS) closures based on a filtered density function (FDF) for large eddy simulations (LES) of turbulent reacting flows. The FDF is the counterpart of the probability density function (
Drozda, Tomasz G. +3 more
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Lyapunov exponent as a metric for assessing the dynamic content and predictability of large-eddy simulations [PDF]
, 2017 Metrics used to assess the quality of large-eddy simulations commonly rely on a statistical assessment of the solution. While thesemetrics are valuable, a dynamicmeasure is desirable to further characterize the ability of a numerical simulation for ...
, +4 more
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On velocity and reactive scalar spectra in turbulent premixed flames [PDF]
, 2014 Kinetic energy and reactive scalar spectra in turbulent premixed flames are studied from compressible three-dimensional direct numerical simulations (DNS) of a temporally evolving rectangular slot-jet premixed flame, a statistically one-dimensional ...
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Case Studies in Thermal EngineeringThis study investigates numerically combustion attributes and NOx formation of premixed ammonia-hydrogen/air flames within a swirl burner of a gas turbine considering various conditions of hydrogen fraction (HF: 0 %, 5 %, 30 %, 40 %, and 50 ...
Mohammed El-Adawy +2 more
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Stochastic and deterministic multiple mapping conditioning for turbulent reacting jets
, 2010 The work presented in this thesis explores the feasibility of the Multiple Mapping Conditioning (MMC) approach and its closures for real (laboratory) flames.
Vogiatzaki, Konstantina +1 more
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Optimizing Flamelet Generated Manifold Models: A Machine Learning Performance Study
CoRRIn chemistry tabulations and Flamelet combustion models, the Flamelet Generated Manifold (FGM) is recognized for its precision and physical representation. The practical implementation of FGM requires a significant allocation of memory resources. FGM libraries are developed specifically for a specific fuel and subsequently utilized for all numerical ...
Reza Lotfi Navaei +2 more
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Examining flow-flame interaction and the characteristic stretch rate in vortex-driven combustion dynamics using PIV and numerical simulation [PDF]
, 2013 In this paper, we experimentally investigate the combustion dynamics in lean premixed flames in a laboratory scale backward-facing step combustor in which flame-vortex driven dynamics are observed.
Ghoniem, Ahmed F. +3 more
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Study on the Dynamic Combustion Characteristics of a Staged High-Temperature Rise Combustor
EnergiesCurrently, steady-state analysis predominates in combustion chamber design, while dynamic combustion characteristics remain underexplored, and there is a lack of a comprehensive index system to assess dynamic combustion behavior.
Meng Li +7 more
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Joint PDF Closure of Turbulent Premixed Flames [PDF]
, 2018 In this paper, a novel model for turbulent premixed combustion in the corrugated flamelet regime is presented, which is based on transporting a joint probability density function (PDF) of velocity, turbulence frequency and a scalar vector.
Hack, Mathias, Jenny, Patrick
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