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Numerical study of a turbulent lobed jet with variable density

Published online by Cambridge University Press:  23 April 2012

Mohamed Boulenouar  and
Bachir Imine
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Abstract

Numerical simulations of the isothermal turbulent jets mixing flows exhausted from twodifferent circular lobed nozzles are presented in the present paper. The numerical studieshave been conducted using a Favre-Reynolds Averaged Navier-Stokes approach, using thesecond-order Reynolds Stress Model (RSM) and structured mesh. Thevalidation of the numerical results with experimental data has been carried out only withone nozzle for the same configuration. This comparison shows reasonable agreement,principally, in terms of centreline longitudinal velocity, longitudinal fluctuatingvelocity and streamwise vorticity. In the second part, the effects of the inlet isothermallobed jet on the mixing process with variable density have been studied numerically. Forthe same area exit geometries (axisymmetric and asymmetric), a qualitative comparison ofthe numerical results with experimental data have been presented. All these indicated thebetter mixing enhancement performance of a lobed nozzle over asymmetric and axisymmetricnozzles respectively.

Keywords

Lobed jetturbulentvariable densitystreamwise vortexRSM modelJet lobémasse volumique variablevortex longitudinalmodèle RSM
Type
Research Article
Information
Mechanics & Industry , Volume 13 , Issue 1 , 2012 , pp. 59 - 68
Copyright
© AFM, EDP Sciences 2012

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References

Nastase, I., Meslem, A., Vortex dynamics and mass entrainment in turbulent lobed jets with and without lobe deflection angles, Exp. Fluids 48 (2010) 693–714 CrossRefGoogle Scholar
So, R., Zhu, J.H., Some measurements in a binary gas jet, Exp. Fluids 9 (1990) 237–284 CrossRefGoogle Scholar
Gouldin, F.C., Schefer, R.W., Johnson, S.C., Kollmann, W., Non-reacting turbulent mixing flows, Progr. Energ. Combust. Sci. 12 (1986) 257–303 CrossRefGoogle Scholar
L. Fulachier, F. Anselmet, M. Amielh, Turbulent jets with variable density, PRC combustion in the rocket motors cryotechnic, CNRS/CNES/SEF, 1990
N.R. Panchapakesan, J. Lumley, Turbulence measurements in axisymmetric jets of air and helium, Part 1 air-jet, Part 2 helium-jet, Fluid Mech. (1993) 225–247
A. Purwanto, Modélisation d’écoulements turbulents-basse vitesse à forte variation de masse volumique, Thèse de doctorat, I. N. P de Toulouse, 1994
Pietri, L., Amielh, M., Anselmet, F., Simultaneous measurements of temperature and velocity fluctuations in a highly heated jet combining a cold wire and laser Doppler, Int. J. Heat, Fluid Flow 21 (2000) 22–36 CrossRefGoogle Scholar
Gazzah, M.H., Sassi, M., Sarh, B., Gökalp, I., Simulation numérique des jets turbulents subsoniques à masse volumique variable par le modèlek-ε, Int. J. Therm. Sci. 41 (2002) 51–62 CrossRefGoogle Scholar
Mhiri, H., Étude numérique des conditions d’émission sur un écoulement de type jet plan turbulent isotherme ou chauffé, Revue générale de thermique 38 (1999) 904–915 CrossRefGoogle Scholar
B. Imine, Études numériques sur les jets turbulents à masse volumique variable, Thèse de doctorat d’état, Université M. Boudiaf Algérie, 2005
B. Mesnier, Études sur le développement de jets turbulents à masse volumique variable à géométries axisymétrique et asymétrique, Thèse de doctorat, Université d’Orléans, 2001
Quinn, W.R., On mixing in an elliptic turbulent free jet, Phys. Fluids 1 (1989) 1716–1722 CrossRefGoogle Scholar
K.B.M.Q. Zaman, Spreading characteristics and thrust of jets from asymmetric nozzles, AIAA, 1996, 96–0200
Hu, H., Kobayashi, T., Saga, T., Taniguchi, N., A study on a lobed jet mixing flow by using stereoscopic PIV tech, Phys. fluids 13 (2001) 3425–3441 CrossRefGoogle Scholar
Koutmos, P., McGuirk, J.J., Turbofan Forced Mixer/Nozzle Temperature and Flow Field Modeling, Int. J. Heat Mass Transfer 32 (1989) 1141–1153 CrossRefGoogle Scholar
Salman, H., Page, G.J, McGuirk, J.J., Prediction of Lobed Mixer Vortical Structures with a k-ε Turbulence Model, AIAA J. 41 (2003) 878–887 CrossRefGoogle Scholar
Sanders, J.P., Sarh, B., Gokalp, I., Variable density effects in axisymmetric isothermal turbulent jet : a comparison between a first and a second order turbulence model, Int. J. Heat Mass Transfer 40 (1997) 823–842 CrossRefGoogle Scholar
A.O. Demuren, R.V. Wilson, Streamwise vorticity generation in laminar and turbulent jets, NASA/CR 209517, ICASE Report 99-33, 1999, pp. 1–11
J.C. Nathan, M. Parviz, H. Hu, Numerical simulation of the vortical structures in a lobed jet mixing flow, 43rd AIAA Aerospace Sciences Meeting and Exhibit, Reno Nevada, 2005-0635, pp. 1–13
Imine, B., Imine, O., Abidat, M., Liazid, A., Study of non-reactive isothermal turbulent asymmetric jet with variable density, Comp. Mech. 385 (2006) 151–162 CrossRefGoogle Scholar
Nastase, I., Meslem, A., Abed-Meraim, K., An experimental investigation on the asymmetric evolution of a lobed jet flow, Int. J. Dynamics Fluids 2 (2006) 73–97 Google Scholar
I. Nastase, Analyse des jets lobés en vue de leur intégration dans les unités terminales de diffusion d’air, Thèse, Université de La Rochelle, 2007