The flow-induced pressure fluctuations in a door gap cavity model were investigated experimentally using a quiet wind tunnel facility. The cavity cross-section dimensions were typical of road vehicle door cavities, but the span was only 25 cm. One cavity wall included a primary bulb rubber seal. A microphone array was used to measure the cavity pressure field over a range of flow velocities and cavity configurations. It was found that the primary excitation mechanism was an “edge tone” phenomenon. Cavity resonance caused amplification around discrete frequencies, but did not cause the flow disturbances to lock-on. Possible fluid-elastic coupling related to the presence of a compliant wall was not significant. A linear spectral decomposition method was then used to characterize the cavity pressure in the frequency domain, as the product of a source spectral distribution function and an acoustic frequency response function. The method was used to assess the effects of modifying the cavity geometry, adding sound absorbing material, and blocking the cavity orifice.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Pressure Fluctuations in a Flow-Excited Door Gap Cavity Model


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Bezemek, J. (Autor:in) / Mongeau, L. (Autor:in) / Danforth, R. (Autor:in)

    Kongress:

    SAE Noise and Vibration Conference and Exposition ; 1997



    Erscheinungsdatum :

    20.05.1997




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Pressure Fluctuations in a Flow-Excited Door Gap Cavity Model

    Mongeau, L. / Bezemek, J. / Danforth, R. et al. | British Library Conference Proceedings | 1997


    Pressure fluctuations in a flow-exited door gap cavity model

    Mongeau,L. / Bezemek,J. / Danforth,R. et al. | Kraftfahrwesen | 1997


    Analytical Model for the Periodic Pressure Fluctuations Induced by Flow Over a Cavity

    Kook, H. / Mongeau, L. | British Library Online Contents | 1997


    Pressure Fluctuations in and around a Flow-Grazed Cavity at Transonic Velocities

    Efimtsov, Boris / Golubev, Alexei / Andersson, Anders | AIAA | 2007


    Pressure Fluctuations in and around a Flow-Grazed Cavity at Transonic Velocities

    Efimtsov, B. / Golubev, A. / Andersson, A. et al. | British Library Conference Proceedings | 2007