TY - JOUR

T1 - Numerical prediction of fluid-resonant oscillations at low mach number

AU - Inagaki, Masahide

AU - Murata, Osamu

AU - Abe, Ken Ichi

AU - Kondoh, Tsuguo

N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.

PY - 2000/9

Y1 - 2000/9

N2 - Our objective is to predict the Fluid-Resonant Oscillation at low Mach number numerically. Because the compressible flow equations become stiff in Iow-Mach-number flows, we derive a new equation set that is suited for the simulation of such flows under assumption that the compressibility effect is weak. The derived equations are essentially the same as the incompressible Navier-Stokes equations except for an additional term. So we can apply almost the same numerical procedure as developed for the incompressible flow equations. Using the present method, a numerical analysis of flows over a three-dimensional open cavity is performed. 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 is able to predict the Fluid-Resonant Oscillation in low-Mach-number flows.

AB - Our objective is to predict the Fluid-Resonant Oscillation at low Mach number numerically. Because the compressible flow equations become stiff in Iow-Mach-number flows, we derive a new equation set that is suited for the simulation of such flows under assumption that the compressibility effect is weak. The derived equations are essentially the same as the incompressible Navier-Stokes equations except for an additional term. So we can apply almost the same numerical procedure as developed for the incompressible flow equations. Using the present method, a numerical analysis of flows over a three-dimensional open cavity is performed. 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 is able to predict the Fluid-Resonant Oscillation in low-Mach-number flows.

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U2 - 10.1299/kikaib.66.649_2274

DO - 10.1299/kikaib.66.649_2274

M3 - Article

AN - SCOPUS:77950041398

VL - 66

SP - 2274

EP - 2281

JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

SN - 0387-5016

IS - 649

ER -