The technical feasibility is described of substantially reducing the noise levels of existing JT8D powered aircraft by retrofitting the existing fleet with quieter refan engines and new acoustically treated nacelles. No major technical problems exist that preclude the development and installation of refanned engines on aircraft currently powered by the JT8D engine. The refan concept is technically feasible and provides calculated noise reductions of from 7 to 8 EPNdb for the B727-200 aircraft and from 10 to 12 EPNdb for the DC-9-32 aircraft at the FAR Part 36 measuring stations. These noise levels are lower than both the FAR Part 36 noise standards and the noise levels of the wide-body DC-10-10. Corresponding reductions in the 90 EPNdb footprint area are estimated to vary from about 70 percent for the DC-9 to about 80 percent for the B727. (Author)


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    Titel :

    Reduction of Jt8d Powered Aircraft Noise by Engine Refanning


    Beteiligte:
    L. E. Stitt (Autor:in) / A. A. Medeiros (Autor:in)

    Erscheinungsdatum :

    1974


    Format / Umfang :

    26 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Reduction of JT8D powered aircraft noise by engine refanning

    Stitt, L. E. / Medeiros, A. A. | NTRS | 1974


    Reduction of JT8D Powered Aircraft Noise By Engine Refanning

    Medeiros, A.A. / Stitt, L.E. | SAE Technical Papers | 1974


    Reduction of JT8D powered aircraft noise by engine refanning

    Stitt, L. E. / Medeiros, A. A. | NTRS | 1974



    Development of JT8D Turbofan Engine Composite Fan Blades

    S. A. SATTAR / H. STARGARDTER AND D. G. RANDALL | AIAA | 1971