Suscripción a Biblioteca: Guest
Página principal de la Biblioteca Digital de ICHMT Año actual Archivos Comité Ejecutivo Centro Internacional de Transferencia de Calor y Masa

Exact solutions to reaction-diffusion equation and the direction of turbulent scalar flux in a premixed turbulent flame and its leading edge

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.200
pages 181-193

Vladimir Sabel'nikov
ONERA, Fundamental and Applied Energetics Department, Fort de Palaiseau, Chemin de la Hunière 91761 Palaiseau Cedex, France

Andrei N. Lipatnikov
Department of Applied Mechanics, Chalmers University of Technology, 41296, Gothenburg, Sweden

Sinopsis

A statistically stationary, planar, one-dimensional premixed turbulent flame is theoretically studied and exact analytical solutions to the problem are obtained using two sets of widely used closure relations. The solutions show that, contrary to widespread belief, the gradient behavior of scalar transport at the leading edge of a premixed turbulent flame brush is not a necessary condition in order for the flame to propagate. The above theoretical results are confirmed by a numerical study of the development of one-dimensional, planar flames initiated by a localized step in combustion progress variable profile. Numerical simulations also indicate that the dependence of the mean rate of product creation on the Favre-averaged combustion progress variable affects significantly the direction of turbulent scalar flux in a premixed flame.

ICHMT Digital Library

Bow shocks on a jet-like solid body shape. Thermal Sciences 2004, 2004. Pulsed, supersonic fuel jets - their characteristics and potential for improved diesel engine injection. PULSED, SUPERSONIC FUEL JETS - THEIR CHARACTERISTICS AND POTENTIAL FOR IMPROVED DIESEL ENGINE INJECTION
View of engine compartment components (left). Plots of temperature distributions in centreplane, forward of engine (right). CHT-04 - Advances in Computational Heat Transfer III, 2004. Devel... DEVELOPMENT AND CURRENT STATUS OF INDUSTRIAL THERMOFLUIDS CFD ANALYSIS
Pratt & Whitney's F-135 Joint Strike Fighter Engine under test in Florida is a 3600F class jet engine. TURBINE-09, 2009. Turbine airfoil leading edge stagnation aerodynamics and heat transfe... TURBINE AIRFOIL LEADING EDGE STAGNATION AERODYNAMICS AND HEAT TRANSFER - A REVIEW
Refractive index reconstructed field. (a) Second iteration. (b) Fourth iteration. Radiative Transfer - VI, 2010. Theoretical development for refractive index reconstruction from a radiative ... THEORETICAL DEVELOPMENT FOR REFRACTIVE INDEX RECONSTRUCTION FROM A RADIATIVE TRANSFER EQUATION-BASED ALGORITHM
Two inclusion test, four collimated sources. Radiative Transfer - VI, 2010. New developments in frequency domain optical tomography. Part II. Application with a L-BFGS associated to an inexa... NEW DEVELOPMENTS IN FREQUENCY DOMAIN OPTICAL TOMOGRAPHY. PART II. APPLICATION WITH A L-BFGS ASSOCIATED TO AN INEXACT LINE SEARCH