DENSITY AND VELOCITY MEASUREMENTS IN TURBULENT HE-AIR BOUNDARY LAYERS

Auteurs-es

  • A SOUDANI Université de Batna
  • S BOUGOUL Université de Batna
  • J L HARION Laboratoire des Ecoulements Géophysiques et Industriels, Grenoble

Mots-clés :

Turbulent boundary layer, mixture of gas, flow with variable density, thermo-anemometry

Résumé

A turbulent  boundary layer with large density variations has been generated by tangential injection of air or helium Into a boundary layer of air-helium mixture. Instrumentation based on thermo- anemometry has been successfully developed for the investigation of this flow  Analysis or the mean and fluctuating density fields shows that the flow is mainly governed by the ratio of the injection to the external velocity and that the density ratio plays a secondary role in the mixing processes. However, a sight enhancement of turbulent activity is observed when helium is injected.

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Bibliographies de l'auteur-e

A SOUDANI, Université de Batna

Département de Physique
Faculté des Sciences

S BOUGOUL, Université de Batna

Département de Physique
Faculté des Sciences

Références

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- LaRue J.C., Libby P.A., "Furthers results related to the turbulent boundary layer with slot injection of helium", Phys. Fluids, Vol. 23, n°6, (1980), pp.1111-1118.

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- Sommer T.P., So R.M.C., Zhang H.S., "Heat Transfer Modeling and the assumption of zero wall temperature fluctuations", J. of Heat Transfer, Vol. 116, (1994), pp.855-863.

- Way J., Libby P.A., "Hot-wire probes for measuring velocity and concentration in helium-air gas mixtures", A.I.A.A.J., 3, n°5, (1970), pp.976-978.

- Purtell L.P., Klebanoff P.S., Buckley F.T., "Turbulent boundary layer at low Reynolds number", Phys. Fluids, Vol.24, n°5, (1981), pp. 802-811.

- Harion J.L., "Influence de différences de densité importantes sur les propriétés de transfert d’une couche limite turbulente", Thèse de doctorat INP Grenoble, (1994).

- Harion J.L., Camano B.E., Favre-Marinet M., "Mesures de vitesse et de concentration par thermo – anémométrie dans des mélanges air – hélium", CRAS Paris, t320 Série IIb, (1995), pp.77-84.

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- Soudani A., "Application des réseaux de neurones aux mesures simultanées en écoulement turbulent", Thèse de doctorat INP Grenoble, (1996).

- Soudani A., "Neural networks: A new method of calibration for the interference probe applied to measurements in air – Helium turbulent boundary layer", Symposium on devices for flow measurement and analysis, USA, (1997).

- Soudani A., Bessaih R., "Application of neural networks to measurements of simultaneous quantities in turbulent flows”, International congress of fluid dynamics and propulsion, Cairo, Egypt, December 29-31 (1996).

- Seban R.A., "Heat transfer and effectiveness for a turbulent boundary layer with tangential fluid injection", J. of Heat Transfer, Vol. 82, (1960), pp.303-312.

- Harmett J.P., Birkebak R.C., Eckert E.R.G, "Velocity distributions, temperature distributions, effectiveness and heat transfer for air injected through a tangential slot into a turbulent boundary layer", J. of Heat Transfer, vol. 83, (1961), pp. 293-306.

- Spalding D.B., "Prediction of adiabatic wall temperature in film-cooling systems”, A.I.A.A.J., 3, n°5 (1965), pp.965-967.

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Publié-e

2003-06-01

Comment citer

SOUDANI, A., BOUGOUL, S., & HARION, J. L. (2003). DENSITY AND VELOCITY MEASUREMENTS IN TURBULENT HE-AIR BOUNDARY LAYERS. Sciences & Technologie. A, Sciences Exactes, (19), 70–75. Consulté à l’adresse https://revue.umc.edu.dz/a/article/view/1835

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