Study of airfoil trailing edge bluntness noise

Wei Jun Zhu, Wen Zhong Shen, Jens Nørkær Sørensen

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    Abstract

    This paper deals with airfoil trailing edge noise with special focus on airfoils with blunt trailing edges. Two methods are employed to calculate airfoil noise: The flow/acoustic splitting method and the semi-empirical method. The flow/acoustic splitting method is derived from compressible Navier-Stokes equations. It provides us possibilities to study details about noise generation mechanism. The formulation of the semi-empirical model is based on acoustic analogy and then curve-fitted with experimental data. Due to its high efficiency, such empirical relation is used for purpose of low noise airfoil design or optimization. Calculations from both methods are compared with exist experiments. The airfoil blunt noise is found as a function of trailing edge bluntness, Reynolds number, angle of attack, etc.
    Original languageEnglish
    Title of host publicationThe Scienceof Making Torque from Wind 2010 : Torque 2010
    Number of pages876
    Publication date2010
    Pages93-100
    Publication statusPublished - 2010
    EventThe Science of Making Torque from Wind 2010 - Crete, Greece
    Duration: 28 Jun 201030 Jun 2010

    Conference

    ConferenceThe Science of Making Torque from Wind 2010
    Country/TerritoryGreece
    CityCrete
    Period28/06/201030/06/2010

    Keywords

    • Airfoil trailing edge blunt noise
    • Aeroacoustics

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