Numerical prediction of fluid-resonant oscillation at low mach number

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

Research output: Contribution to conferencePaper

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
Publication statusPublished - Dec 1 2000
Event6th Aeroacoustics Conference and Exhibit, 2000 - Lahaina, HI, United States
Duration: Jun 12 2000Jun 14 2000

Other

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

Fingerprint

Mach number
flow equations
oscillations
Fluids
Compressible flow
fluids
Incompressible flow
predictions
Compressibility
Flow velocity
compressibility effects
Navier Stokes equations
Natural frequencies
cavities
compressible flow
incompressible flow
Stiffness
Navier-Stokes equation
resonant frequencies
stiffness

All Science Journal Classification (ASJC) codes

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

Cite this

Inagaki, M., Murata, O., Kondoh, T., & Abe, K. (2000). Numerical prediction of fluid-resonant oscillation at low mach number. Paper presented at 6th Aeroacoustics Conference and Exhibit, 2000, Lahaina, HI, United States.

Numerical prediction of fluid-resonant oscillation at low mach number. / Inagaki, M.; Murata, O.; Kondoh, T.; Abe, K.

2000. Paper presented at 6th Aeroacoustics Conference and Exhibit, 2000, Lahaina, HI, United States.

Research output: Contribution to conferencePaper

Inagaki, M, Murata, O, Kondoh, T & Abe, K 2000, 'Numerical prediction of fluid-resonant oscillation at low mach number', Paper presented at 6th Aeroacoustics Conference and Exhibit, 2000, Lahaina, HI, United States, 6/12/00 - 6/14/00.
Inagaki M, Murata O, Kondoh T, Abe K. Numerical prediction of fluid-resonant oscillation at low mach number. 2000. Paper presented at 6th Aeroacoustics Conference and Exhibit, 2000, Lahaina, HI, United States.
Inagaki, M. ; Murata, O. ; Kondoh, T. ; Abe, K. / Numerical prediction of fluid-resonant oscillation at low mach number. Paper presented at 6th Aeroacoustics Conference and Exhibit, 2000, Lahaina, HI, United States.
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