格子ボルツマン法による分岐管内流力音響共鳴の解析評価(解析・予測・制御数値計算(1),一般講演)

概要

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Flow-acoustic coupling resonance in a closed side branch has been calculated using the finite difference lattice Boltzmann method (FDLBM). In order to improve accuracy of the finite difference lattice Boltzmann method, an explicit four-stage second order Runge-Kutta time integration method and a sixth order central difference scheme are applied to discretization of the governing equation. Dynamic Smagorinsky model is also introduced into the governing equation as a turbulence model. Sound generation by collision of vortices with the downstream edge of the side branch is clearly captured by the numerical analysis. The numerical results are quantitatively compared with experimental data. The relative error of peak value of acoustic pressure at the bottom of side branch is 22 percent.
日本流体力学会の論文
2009-09-02