Two dimensional unsteady flow over an open acoustic cavity

Vyas, JJ and Mudkavi, Vidyadhar Y (2008) Two dimensional unsteady flow over an open acoustic cavity. In: Proceedings of International Conference on Aerospace Science and Technology (INCAST 2008-017), 26-28 Jun 2008, Bangalore, India.

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    Abstract

    A finite difference code with multi-block capability and based on MacCormack time marching is developed to simulate two-dimensional unsteady compressible viscous laminar flow over an open cavity. The length to depth ratio of the cavity (L/D) is taken to be 4. The flow in the cavity is dominated by vorticity that acts as a source of sound and is transported downstream. The flow Reynolds number based on cavity depth is ReD =1500 and the Mach number M = 0.15. The radiated sound is further computed using a modified form of the Curlex2019;s integral equation in which the source terms are calculated from flow fluctuations. Results show that the wall contributes most to the sound as expected. The code was validated against standard flow problems.

    Item Type: Conference or Workshop Item (Paper)
    Additional Information: Copyright for this article belongs to National Aerospace Laboratories
    Uncontrolled Keywords: Computational aero acoustics;Curlex2019;s equation;Low Mach number;Open cavity;Noise generation
    Subjects: AERONAUTICS > Aeronautics (General)
    Division/Department: Other, Computational and Theoretical Fluid Dynamics Division
    Depositing User: Ms. Alphones Mary
    Date Deposited: 26 Feb 2009
    Last Modified: 17 Jun 2010 14:20
    URI: http://nal-ir.nal.res.in/id/eprint/4988

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