Numerical prediction of fluid-resonant oscillation at low mach number

M. Inagaki, O. Murata, T. Kondoh, K. Abe

Research output: Contribution to conferencePaperpeer-review

Abstract

We have constructed a method (governing equation set and numerical procedure) that is suited for the numerical simulation of the Fluid-Resonant Oscillation at low Mach number. By using the new equation set we have derived under assumption that the compressibility effect is weak, we do not have to worry about the stiffness problem from which we suffer with the usual compressible flow equations. In addition, because the derived equations are essentially the same as the incompressible Navier-Stokes equations except for an additional term, we can apply almost the same numerical procedure as developed for the incompressible flow equations. In order to verify the present method, we apply it to the flows over a three-dimensional open cavity. The results show that strong pressure fluctuations occur at specific flow velocities. Also shown is that the frequency of the pressure fluctuations is locked-in at the Helmholtz resonant frequency of the cavity. Thus, it is confirmed that the present method has the capability of predicting the Fluid-Resonant Oscillation in low-Mach-number flows.

Original languageEnglish
DOIs
Publication statusPublished - 2000
Event6th Aeroacoustics Conference and Exhibit, 2000 - Lahaina, HI, United States
Duration: Jun 12 2000Jun 14 2000

Other

Other6th Aeroacoustics Conference and Exhibit, 2000
Country/TerritoryUnited States
CityLahaina, HI
Period6/12/006/14/00

All Science Journal Classification (ASJC) codes

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

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