Aeroacoustic computations of turbulent flows over an open cavity

Sung R. Koh, Young June Moon

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

1 Citation (Scopus)

Abstract

Two-dimensional compressible turbulent flow simulations are performed for the open cavities (L/D=0.787 and 2.36) with an EASM (Explicit Algebraic Stress Model) second-moment turbulence closure model. For direct numerical simulations of the flow-sound wave interactions, the full compressible Navier-Stokes equations are solved with a sixth-order compact scheme and a fourthorder Runge-Kutta method. The present study is focused on prediction of the cavity tones at low subsonic Mach numbers (0.1 ≤ M ≤ 0.4), for which a mode shifting from an acoustic feedback to a depth mode occurs. In this study, the present URANS-based DaNS(Direct Acoustic Numerical Simulation) results are validated with the experimental data and theories by comparing the Strouhal numbers of the cavity tones, and the vortical structures of the turbulent shear layer are studied for each mode with considering the effect of cavity length to depth ratio.

Original languageEnglish
Title of host publication9th AIAA/CEAS Aeroacoustics Conference and Exhibit
Publication statusPublished - 2003 Dec 1
Event9th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2003 - Hilton Head, SC, United States
Duration: 2003 May 122003 May 14

Other

Other9th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2003
CountryUnited States
CityHilton Head, SC
Period03/5/1203/5/14

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ASJC Scopus subject areas

  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Acoustics and Ultrasonics

Cite this

Koh, S. R., & Moon, Y. J. (2003). Aeroacoustic computations of turbulent flows over an open cavity. In 9th AIAA/CEAS Aeroacoustics Conference and Exhibit