An inverse integral prediction method for the development of separated turbulent boundary layers developed from the lag-entrainment method is described. The inverse method uses the concept of equilibrium separated boundary layer flows and the predicted characteristics of such flows will be compared with measurements which represent the first known demonstration that equilibrium separated boundary layers can be realised experimentally. In these experiments the data were obtained with a single-component laser Doppler anemometer usually set up to measure streamwise components of mean velocity and turbulence intensity; in addition, however, one pair of profiles of the mean velocity and turbulence intensity normal to the wall was obtained. The separated flow on a NACA 4412 aerofoil has been measured by Wadcock using the flying hot-wire technique. It is shown that predicted values of momentum thickness agree with the measured values but that the calculation predicts a pressure rise in the separated region whereas the pressure is almost constant in the experiment. The result of introducing second order effects into the calculation is shown. The equivalent inviscid flow is constructed and the matching of the equivalent and real flows is considered.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Calculation and measurement of separated turbulent boundary layers


    Weitere Titelangaben:

    Berechnung und Messung der Abloesung turbulenter Grenzschichten


    Beteiligte:
    Smith.P.D. (Autor:in) / Hastings, R.C. (Autor:in) / Williams, B.R. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1982


    Format / Umfang :

    39 Seiten


    Medientyp :

    Report


    Format :

    Print


    Sprache :

    Englisch




    Prediction of Turbulent Separated Boundary Layers

    GARY D. KUHN AND JACK N. NIELSEN | AIAA | 1974


    Prediction of turbulent separated boundary layers

    KUHN, G. / NIELSEN, J. | AIAA | 1973


    Measurements Of Shock-Separated Turbulent Boundary Layers

    Brown, J. D. / Brown, J. L. / Kussoy, M. I. | NTRS | 1990


    The calculation of separated boundary layers

    Pope, S.B. | Tema Archiv | 1977


    An Inverse Method for Separated Turbulent Boundary Layers

    Dumitrescu, H. / Dumitrache, A. / Cardos, V. et al. | British Library Conference Proceedings | 1995