Empirical refinements to boundary layer transition noise models

Richard Chostner Marboe, Gerald C. Lauchle

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    We have discussed two similar theoretical models for direct radiation from a transitioning boundary layer zone. The predicted radiated noise levels due to the transition process are sensitive to several factors which will require such empirical description in order to practically use the models, whether applied to flow over a wall, around a body of revolution, or over an airfoil or hydrofoil. They include: the effect of the dynamics of the spot substructures on the normal surface velocity accurate displacement thickness rise time, and spatially-dependent normal velocity measurements; and effects of adverse pressure gradient including the possibility of laminar separation prior to transition. The radiated noise component magnitude can be added to the convective and low wavenumber contribution to find the wall pressure forcing spectrum as input to the fluid-structure interaction problems of interest.

    Original languageEnglish (US)
    Title of host publicationProgress in Noise Control for Industry
    EditorsJoseph M. Cuschieri, Stewart A.L. Glegg, David M. Yeager
    PublisherPubl by Inst of Noise Control Engineering
    Pages209-214
    Number of pages6
    ISBN (Print)0931784271
    StatePublished - Jan 1 1994
    EventProceedings of the 1994 National Conference on Noise Control Engineering - Fort Lauderdale, FL, USA
    Duration: May 1 1994May 4 1994

    Publication series

    NameProceedings - National Conference on Noise Control Engineering

    Other

    OtherProceedings of the 1994 National Conference on Noise Control Engineering
    CityFort Lauderdale, FL, USA
    Period5/1/945/4/94

    All Science Journal Classification (ASJC) codes

    • Acoustics and Ultrasonics
    • General Engineering

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