Computation of vortex shedding and radiated sound for a circular cylinder

Jared S. Cox, Christopher L. Rumsey, Kenneth Steven Brentner, Bassam A. Younis

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

The Lighthill acoustic analogy approach combined with Reynolds-averaged Navier-Stokes is used to predict the sound generated by unsteady viscous flow past a circular cylinder assuming a correlation length of ten cylinder diameters. The two-dimensional unsteady flow field is computed using two Navier-Stokes codes at a low Mach number over a range of Reynolds numbers from 100 to 5 million. Both laminar flow as well as turbulent flow with a variety of eddy viscosity turbulence models are employed. Mean drag and Strouhal number are examined, and trends similar to experiments are observed. Computing the noise within the Reynolds number regime where transition to turbulence occurs near the separation point is problematic: laminar flow exhibits chaotic behavior and turbulent flow exhibits strong dependence on the turbulence model employed. Comparisons of far-field noise with experiment at a Reynolds number of 90,000, therefore, vary significantly, depending on the turbulence model. At a high Reynolds number outside this regime, three different turbulence models yield self-consistent results.

Original languageEnglish (US)
Pages (from-to)447-454
Number of pages8
JournalAmerican Society of Mechanical Engineers, Aerospace Division (Publication) AD
Volume53-1
StatePublished - Dec 1 1997
EventProceedings of the 1997 ASME International Mechanical Engineering Congress and Exposition - Dallas, TX, USA
Duration: Nov 16 1997Nov 21 1997

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Space and Planetary Science

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