0
Research Papers

Numerical Study of the Turbulent Flow Inside an ORACLES Configuration

[+] Author and Article Information
Fethi Bouras1

 University of HL-Batna, 05000 Batna, Algeriaf.bouras@hotmail.fr

Azeddine Soudani, Mohamed Si-Ameur

 University of HL-Batna, 05000 Batna, Algeria

1

Corresponding author.

J. Appl. Mech 79(5), 051014 (Jun 29, 2012) (5 pages) doi:10.1115/1.4006455 History: Received October 27, 2010; Revised March 11, 2012; Posted March 29, 2012; Published June 28, 2012; Online June 29, 2012

This numerical investigation deals with the validation of the experimental results in the inert cases of Nguyen , obtained in the framework of the European Union-funded research program MOLECULES (Modelling of Low Emissions Combustors Using Large Eddy Simulations). This study is based on the benchmark of testing one rig for accurate comparisons with large eddy simulations configuration (ORACLES), aimed at helping the design of reliable lean premixed prevaporized) combustion chambers and supplied with two identical flows of air channels. Therefore, this study is based on the 3D numerical simulation using large eddy simulation-wall adapting local eddy viscosity (LES-WALE) model that aims to determine the longitudinal velocity, the longitudinal velocity fluctuation and the length of recirculation zone for the three cases of flow in different inlet Reynolds (Re = 25,000, 50,000, 75,000). Calculations are carried out by the FLUENT_CFD. The results obtained are compared with experimental measurements of Nguyen The LES_WALE eddy viscosity computation presents a good agreement with the experimental data where we could observe the asymmetrical flow and also detect the recirculation zones and the differences between the cases of the flow.

FIGURES IN THIS ARTICLE
<>
Copyright © 2012 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Schematic of the entire ORACLES (dimensions in mm)

Grahic Jump Location
Figure 2

Grid and computational domain

Grahic Jump Location
Figure 3

Comparison of average longitudinal velocity and longitudinal velocity fluctuation for nc1 case (Re = 25,000). — LES longitudinal velocity; • Experimental longitudinal velocity; − −− − LES longitudinal velocity fluctuations; X Experimental longitudinal velocity fluctuation.

Grahic Jump Location
Figure 4

Comparison of time-average longitudinal velocity and longitudinal velocity fluctuation for nh1 case (Re = 50,000). — LES longitudinal velocity; • Experimental longitudinal velocity; − −− − LES longitudinal velocity fluctuations; X Experimental longitudinal velocity fluctuation.

Grahic Jump Location
Figure 5

Comparison of average longitudinal velocity and longitudinal velocity fluctuation for nm1 case (Re = 75,000). — LES longitudinal velocity; • Experimental longitudinal velocity; − −− − LES longitudinal velocity fluctuations; X Experimental longitudinal velocity fluctuation.

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In