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

Effect of jet's inlet temperature field excitation on heat transfer by turbulent impinging jet: an investigation based on large eddy simulations

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.1940
page 10

N. Uddin
Computational Thermo-Fluid Laboratory, Mechanical Engineering Department, NED University of Engineering and Technology, University Road, Karachi 75270, Pakistan

S. O. Neumann
Institute of Aerospace Thermodynamics, University of Stuttgart, Germany

Bernhard Weigand
Universität Stuttgart

Sinopsis

In this paper, the effect of inlet temperature field excitation on the impinging jet heat transfer has been investigated using Large Eddy Simulation (LES). There are several experimental and numerical studies on the inlet velocity field excitations of a turbulent impinging jets, however, the temperature field excitation has not been done before. The Reynolds number (Re) of the jet is 23000 and dimensionless jets outlet to target wall distance is two. To ensure a good quality of the simulation, the non-excited jet is simulated first. From the simulation, It is found that the Strouhal number corresponding to the preferred mode of the unexcited jet is 0.328. The jets inlet temperature field is then excited with three different frequencies. The heat transfer enhancement is found to be possible with inlet temperature field excitation; however, the improvement depends crucially on the excitational frequencies.

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