F311 差分格子ボルツマン法によるスリット及び穴あき円柱から生じる空力音の直接計算(F-31 騒音(1),一般講演)

概要

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Three dimensional direct simulation of aero acoustic waves emitted from slitted and holed circular cylinders by finite difference Boltzmann method (FDLBM) is reported. We use a new lattice BGK compressible fluid model that has an additional term and allow larger time increment comparing the conventional FDLBM, and also use a boundary fitted co-ordinates. We have succeeded in capturing very small pressure fluctuations in a uniform flow over a circular cylinder. They generated with same frequency of Karman vortex street. We calculated directly aero acoustic waves emitted from slitted and holed circular cylinders by the finite difference lattice Boltzmann method, and compared pressure fluctuations generated from slitted and holed circular cylinders.
日本流体力学会の論文
2004-08-09