Methods of calculating airframe noise due to the following components are presented: wings and stabilizers, flaps, landing gear 'self-noise', landing gear bay (wheel well) oscillations, separated flow interaction with edges of cavities, and doors associated with gear deployment. The predominant source mechanisms were dipole-like in nature, being related to the local fluctuating aerodynamic forces on struts, airfoil edges, cavity edges, etc. Available data are converted into semiempirical prediction methods to enable a tentative rank ordering of noise sources. A sample application of these prediction procedures is carried out for a typical CTOL passenger jet using actual aircraft parameters, where available.


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    Title :

    Diagnostic calculations of airframe-radiated noise


    Contributors:
    Hayden, R. E. (author) / Kadman, Y. (author) / Bliss, D. B. (author) / Africk, S. A. (author)

    Conference:

    American Institute of Aeronautics and Astronautics, Aero-Acoustics Conference ; 1975 ; Hampton, VA


    Publication date :

    1975-03-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    Diagnostic calculations of airframe-radiated noise

    HAYDEN, R. / KADMAN, Y. / BLISS, D. et al. | AIAA | 1975


    Diagnostic Calculations of Airframe-Radiated Noise

    Strahle, Warren C. / Nagamatsu, Henry T. / Schwartz, Ira R. | AIAA | 1976