A full-scale wind-tunnel test was conducted of two boundary-layer-control applications to a 44-foot diameter helicopter rotor. Blowing from a nozzle near the leading edge of the blades delayed retreating blade stall. Results also indicated that delay of retreating blade stall could be obtained by cyclic blowing with a lower flow rate than that required for continuous blowing. It was found that blowing applied through a nozzle at mid-chord had no effect on retreating blade stall.


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    Title :

    Full-Scale Wind-Tunnel Tests of Blowing Boundary-Layer Control Applied to a Helicopter Rotor


    Contributors:
    J. L. McCloud (author) / L. P. Hall (author) / J. A. Brady (author)

    Publication date :

    1960


    Size :

    36 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Full-Scale Wind-Tunnel Tests of Blowing Boundary-Layer Control Applied to a Helicopter Rotor

    McCloud, John L., III / Hall, Leo P. / Brady, James A. | NTRS | 1960


    Full-scale wind-tunnel tests of blowing boundary-layer control applied to a helicopter rotor

    McCloud, John L. / Hall, Leo P. / Brady, James A. | TIBKAT | 1960




    Helicopter wind tunnel tests

    Ross, R.S. | Engineering Index Backfile | 1947