Experimental data of the peak axial-velocity decay in a moving airstream are presented for several types of nozzles. The nozzles include a six-tube mixer nozzle of a type considered for reduction of jet-flap interaction noise for externally-blown-flap STOL aircraft. The effect of secondary flow on the core flow velocity decay of a bypass nozzle is also discussed. Tentative correlation equations are suggested for the configurations evaluated. Recommendations for minimizing forward velocity effects on velocity decay and jet-flap interaction noise are made.


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    Title :

    Forward flight effects on mixer nozzle design and noise considerations for STOL externally blown flap systems


    Contributors:

    Conference:

    Aircraft Design Flight Test and Oper. Meeting ; 1972 ; Los Angeles


    Publication date :

    1972-01-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English


    Keywords :





    Noise tests of a mixer nozzle : externally blown flap system

    Goodykoontz, Jack H. / Dorsch, Robert G. / Groesbeck, Donald E. | TIBKAT | 1973


    Externally-blown-flap noise.

    Dorsch, R. G. / Kreim, W. J. / Olsen, W. A. | NTRS | 1972