Flight experiments are being conducted as part of a multiphased subsonic transport high-lift research program for correlation with wind-tunnel and computational results. The NASA Langley Transport Systems Research Vehicle (B737-100 aircraft) is used to obtain in-flight flow characteristics at full-scale Reynolds numbers to contribute to the understanding of 3-D high-lift, multi-element flows including attachment-line transition and relaminarization, confluent boundary-layer development, and flow separation characteristics. Flight test results of pressure distributions and skin friction measurements were obtained for a full-chord wing section including the slat, main-wing, and triple-slotted, Fowler flap elements. Test conditions included a range of flap deflections, chord Reynolds numbers (10 to 21 million), and Mach numbers (0.16 to 0.40). Pressure distributions were obtained at 144 chordwise locations of a wing section (53-percent wing span) using thin pressure belts over the slat, main-wing, and flap elements. Flow characteristics observed in the chordwise pressure distributions included leading-edge regions of high subsonic flows, leading-edge attachment-line locations, slat and main-wing cove-flow separation and reattachment, and trailing-edge flap separation. In addition to the pressure distributions, limited skin-friction measurements were made using Preston-tube probes. Preston-tube measurements on the slat upper surface suggested relaminarization of the turbulent flow introduced by the pressure belt on the slat leading-edge surface when the slat attachment line was laminar. Computational analysis of the in-flight pressure measurements using two-dimensional, viscous multielement methods modified with simple-sweep theory showed reasonable agreement. However, overprediction of the pressures on the flap elements suggests a need for better detailed measurements and improved modeling of confluent boundary layers as well as inclusion of three-dimensional viscous effects in the analysis.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    In-flight pressure distributions and skin-friction measurements on a subsonic transport high-lift wing section


    Beteiligte:
    Yip, Long P. (Autor:in) / Vijgen, Paul M. H. W. (Autor:in) / Hardin, Jay D. (Autor:in) / Vandam, C. P. (Autor:in)


    Erscheinungsdatum :

    1993-09-01


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :



    In-Flight pressure measurements on a subsonic transport high-lift wing section

    Yip, Long P. / Vijgen, Paul M. H. V. / Hardin, Jay D. et al. | AIAA | 1995


    Wing pressure distributions from subsonic tests of a high-wing transport model

    Applin, Zachary T. / Gentry, Garl L., Jr. / Takallu, M. A. | NTRS | 1995


    Wing Pressure Distributions from Subsonic Tests of a High-Wing Transport Model

    Z. T. Applin / G. L. Gentry / M. A. Takallu | NTIS | 1995