RANS modelling of a lifted hydrogen flame using eulerian/lagrangian approaches with transported PDF method

Autor: Mohamed Bouzit, Iskender Gökalp, Ahmed Amine Larbi, Mohamed Senouci, Abdelhamid Bounif
Přispěvatelé: Université des sciences et de la Technologie d'Oran Mohamed Boudiaf [Oran] (USTO MB), Unité de Recherche en Energies Renouvelables en Milieu Saharien (URER-MS), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), Institut de Combustion, Aérothermique, Réactivité et Environnement (ICARE), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut des Sciences de l'Ingénierie et des Systèmes (INSIS)
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Mixing constant
020209 energy
Probability density function
02 engineering and technology
Computational fluid dynamics
K-epsilon modified
Lift off height
Industrial and Manufacturing Engineering
Physics::Fluid Dynamics
symbols.namesake
0203 mechanical engineering
0202 electrical engineering
electronic engineering
information engineering
Electrical and Electronic Engineering
Eulerian
Lagrangian
Civil and Structural Engineering
Parametric statistics
Mathematics
Turbulent diffusion
business.industry
Turbulence
Mechanical Engineering
[SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment
PDF transport
Eulerian path
Building and Construction
Mechanics
Pollution
020303 mechanical engineering & transports
General Energy
symbols
Reynolds-averaged Navier–Stokes equations
Convection–diffusion equation
business
Zdroj: Energy
Energy, Elsevier, 2018, 164, pp.1242-1256. ⟨10.1016/j.energy.2018.08.073⟩
ISSN: 0360-5442
DOI: 10.1016/j.energy.2018.08.073⟩
Popis: International audience; In this study, the eulerian probability density function approach (EPDF) has been applied to simulate turbulent diffusion flame in a Vitiated Coflow. EPDF is the eulerian method to solve the PDF transport equations with a direct-quadrature-method-of-moments (DQMOM) closure. The PDF transport equation represented by a set of governing equations for the probability of occurrence in any environmental condition and the probability weighted species mass fractions, which are solved in an eulerian solution [1]; it is considered a product of the delta function, in order to model the turbulence–chemistry interaction. Among these advantages are the prediction and the kinetic control of the species such as CO and NOX. Even though the EPDF approach has been improved in recent years, most improvements have been achieved with parametric study in order to investigate the impact of the model accuracy. The main objective of this investigation is the numerical evaluation of the PDF approach accuracy, using different mixing models and turbulence models, to predict the lift-off height, the extinction and ignition of the flame. Another study comparative of eulerian (EPDF) and lagrangian monte-carlo (LPDF) was applied by equivalent physical models and numerical parameters for evaluating the performances of each approach such as precision and computational specification. The chosen mixture model is the IEM (Interaction by Exchange with the Mean) for micro-mixing closure. The number of environment in the eulerian approach EPDF is (2.0). Through the use of a dynamic model for the mixing time-scale, by computing the individual time-scales for the reactive scalars dynamically in each cell during the course of the simulation using the ANSYS-Fluent/MM-INTAS CFD codes and the chemical reaction mechanism injected is GRI mech 2.1. The results such as mixture fraction, temperature, species mass fraction is validated with experimental data and discussed.
Databáze: OpenAIRE
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