Three-Dimensional (3-D) transonic Blade-Vortex-Interaction (BVI) noise for an advancing rotor is studied numerically. The unsteady transonic Full-Potential Rotor (FPR) code is used for the simulation of the transonic BVI near-field flow. A rotating Kirchhoff's method is used for the extension to the acoustic far-field. The formulation (Farassat's method) is extended for an advancing rotor and an observer moving with the free stream allows a direct comparison with experiments. Test results are presented in this paper for a rotating point source. Results for transonic advancing BVI are presented and various cases are shown. The understanding of the 3-D transonic BVI noise mechanisms and directivity for an advancing rotor are discussed here.


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    Title :

    Transonic 3-D BVI noise using a rotating Kirchhoff formulation for advancing rotors


    Additional title:

    Die rechnerische Erfassung der schallnahen Wechselwirkung von Rotorblatt und Wirbelbildung und deren Geräuschemission für verbesserte Rotorblätter


    Contributors:
    Lyrintzis, A.S. (author) / Kilaras, M.S. (author) / Xue, Y. (author)


    Publication date :

    1994


    Size :

    13 Seiten, 10 Bilder, 44 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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