The design and testing of Natural Laminar Flow (NLF) airfoils is examined. The NLF airfoil was designed for low speed, having a low profile drag at high chord Reynolds numbers. The success of the low speed NLF airfoil sparked interest in a high speed NLF airfoil applied to a single engine business jet with an unswept wing. Work was also conducted on the two dimensional flap design. The airfoil was decambered by removing the aft loading, however, high design Mach numbers are possible by increasing the aft loading and reducing the camber overall on the airfoil. This approach would also allow for flatter acceleration regions which are more stabilizing for cross flow disturbances. Sweep could then be used to increase the design Mach number to a higher value also. There would be some degradation of high lift by decambering the airfoil overall, and this aspect would have to be considered in a final design.


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    Titel :

    Design of the low-speed NLF(1)-0414F and the high-speed HSNLF(1)-0213 airfoils with high-lift systems




    Erscheinungsdatum :

    1987-12-01


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :



    Wind tunnel results of the high-speed NLF(1)-0213 airfoil

    Sewall, William G. / Mcghee, Robert J. / Hahne, David E. et al. | NTRS | 1987


    Wind Tunnel Results of the High-Speed NLF(Natural Flow Control)(1)-0213 Airfoil

    W. G. Sewall / R. J. McGhee / D. E. Hahne et al. | NTIS | 1987



    Design of Subsonic Airfoils for High Lift

    Robert H. Liebeck | AIAA | 1978