S0802-1-1 差分格子ボルツマン法による複数分岐管内流力音響共鳴の解析評価(原子力システムおよび要素技術(1))

概要

論文の詳細を見る
Flow-acoustic coupling resonance in multiple side branches has been calculated using the finite difference lattice Boltzmann method (FDLBM). In order to improve accuracy of the FDLBM, an explicit four-stage second order Runge-Kutta time integration method and a sixth order central difference scheme were applied to discretization of the governing equation. Dynamic Smagorinsky model was also introduced into the governing equation as a turbulence model. Occurrence of the flow-acoustic resonance in the side branches and generation of the vortices which were the sound sources are observed. The numerical results showed that the acoustic pressure of the flow-acoustic coupling resonance of the multiple side branches became approximately three times larger than that of the single side branch because the side branches acoustically interact with each other. The acoustic pressure amplitude of the numerical results showed quantitative good agreement with that of the experimental results.
一般社団法人日本機械学会の論文
2010-09-04