Library Subscription: Guest
ICHMT DL Home Current Year Archives Executive Committee International Centre for Heat and Mass Transfer

LES Simulation of a Turbulent Methane/Air Premixed bluff body flame with Non-Adiabatic Flamelet Progress Variable Approach

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.1210
15 pages

D. Cecere
Process and Energy Systems Engineering Laboratory, ENEA Casaccia Research Center, Rome - ITALY

E. Giacomazzi
Process and Energy Systems Engineering Laboratory, ENEA Casaccia Research Center, Rome - ITALY

F. R. Picchia
Process and Energy Systems Engineering Laboratory, ENEA Casaccia Research Center, Rome - ITALY

N. Arcidiacono
Process and Energy Systems Engineering Laboratory, ENEA Casaccia Research Center, Rome - ITALY

F. Donato
Dep. of Electrical Enginnering, "Sapienza" University of Rome; ENEA, Italian Agency for New Technologies Energy and Environment, Rome, Italy

R. Verzicco
Dep. of Mechanical Engineering, University of Rome "Tor Vergata", Italy

Abstract

A Large Eddy Simulation of a CH4/Air premixed bluff body flame is performed by means of a progress variable/flame surface density/probability density function approach. In particular, both mean and variance of the progress variable are transported. Its subgrid spatially filtered gradient contributes to model the flame surface density (that introduces the effect of the subgrid flame reaction zone) and to presume a probability density function (that introduces the effect of subgrid fluctuations on chemistry). Chemistry is tabulated in terms of laminar premixed flames and enthalpy is included as a new coordinate in their tabulation to take into account heat losses in the flowfield. The filtered mass, momentum, enthalpy and scalar equations mentioned above are integrated by means of an explicit scheme using finite differences, 2nd–order accurate in space and third order in time, over a cylindrical non-uniform grid using a staggered approach. The bluff-body geometry is modeled by using the Immersed Boundary Method. The predictions of velocity and temperature are compared with available experimental data.

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