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Velocity Profiles in Shear-Driven Liquid Films: LDV-Measurements

  • S. Wittig
  • A. Elsäßer
  • W. Samenfink
  • J. Ebner
  • K. Dullenkopf
Conference paper

Abstract

In design and layout of fuel preparation systems for SI-engines or gas turbines as well as other technical systems working with shear-driven liquid films accurate information on the velocity distribution within the film as a function of film height is necessary for numerical modeling. To meet this requirements an improved LDV system was built which allows for the first time accurate velocity measurements in thin and wavy liquid films down to an average thickness of about 100 µm. Layout and the optical arrangement of the new system is presented in details together with some examplary applications.

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References

  1. [1]
    Deissler, R.G.: Heat Transfer and Fluid Friction for Fully Developed Turbulent Flow of Air and Supercritical Water with Variable Fluid Properties. ASME-Journal of Fluids Engineering, 76, pp. 73–85, 1954.Google Scholar
  2. [2]
    Elsäßer, A., Samenfink, W., Hallmann, M. and Wittig, S.: Mixing Phenomena of Fuel Sprays in Intake Manifolds. In: Proceedings on the Sixth International Conference on Liquid Atomization and Spray Systems (iclass94), Rouen, France, Paper VII–10, 1994.Google Scholar
  3. [3]
    Glahn, A. and Wittig, S.: Two-Phase Air/Oil Flow in Aero Engine Bearing Chambers-Characterization of Oil Film Flows. ASME-Paper 95–GT–114, 1995.Google Scholar
  4. [4]
    Mudawar, I. and Houpt, R.: Measurement of Mass and Momentum Transport in Wavy-Laminar Falling Liquid Films. International Journal of Heat and Mass Transfer, 36, No. 17, pp. 4151–4162, 1993.CrossRefGoogle Scholar
  5. [5]
    Paras, S.V. and Karabelas, A.J.: Measurements of Local Velocities Inside Thin Liquid Films in Horizontal Two-Phase Flow. Experiments in Fluids, 13, pp. 190–198, 1992.ADSCrossRefGoogle Scholar
  6. [6]
    Pfeiffer, A.: Entwicklung einer keramischen Kleingasturbinen-Brennkammer: Neue Möglichkeiten zur schadstoffarmen Verbrennungsfüh- rung. Dissertation, Institut für Thermische Strömungsmaschinen, Universität Karlsruhe (T.H.), 1992.Google Scholar
  7. [7]
    Plimon, A.: Velocity Profiles in Shear Force Driven Wall Films. Experiments in Fluids, 11, pp. 339–340, 1991.ADSCrossRefGoogle Scholar
  8. [8]
    Samenfink, W., Elsäßer, A., Wittig, S. and Dullenkopf, K.: Internal Transport Mechanisms of Shear-driven Liquid Films. Eighth International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, 8–11 July, 1996.Google Scholar
  9. [9]
    Tieu, A.K., Mackenzie, M.R. and Li, E.B.: Measurement in Microscopic Flow With a Solid-State LDA. Experiments in Fluids, 19, pp. 293–294, 1995.ADSCrossRefGoogle Scholar
  10. [10]
    Wittig, S., Himmelsbach, J., Noll, B., Feld, H.J. and Samenfink, W.: Motion and Evaporation of Shear-Driven Liquid Films in Turbulent Gases. ASME-Journal of Engineering for Gas Turbines and Power, 114, pp. 395–400,1992.CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • S. Wittig
    • 1
  • A. Elsäßer
    • 1
  • W. Samenfink
    • 1
  • J. Ebner
    • 1
  • K. Dullenkopf
    • 1
  1. 1.Lehrstuhl und Institut für Thermische StrömungsmaschinenUniversität Karlsruhe (TH)KarlsruheGermany

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