乱流境界層内のキャビティにおける流体共鳴振動(対流・拡散・渦・波動波動(4),一般講演)

概要

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We investigate the fluid-acoustic interactions in the fluid-resonant oscillations in a flow over a two-dimensional cavity by directly solving the compressible Navier-Stokes equations. The upstream boundary layer is turbulent, and the freestream Mach number is 0.15 or 0.3. Also, we measure the pressure level and the frequency of tonal sound radiating from a cavity flow in a low-noise wind tunnel in order to confirm the computational results. The computational results show that the mechanisms of the formation of large-scale vortices and the radiation of acoustic waves are essentially the same as those in the fluid-dynamic oscillations. We also clarify the effects of the cavity depth on the frequency and sound pressure level of the oscillations.
日本流体力学会の論文
2009-09-02