207 ALE法を用いた差分格子ボルツマン法による回転三次元翼から生じる空力音の直接計算(S37-1 CFDの新展開(1),S37 CFDの新展開)

Abstract

Direct simulation of aero-acoustic waves has been successfully simulated by the finite difference lattice Boltzmann method (FDLBM). So far the sound waves emitted from a stationary body, such as the Aeolian tone or edge tone, but more demands are expected for direct simulation of aero-acoustic waves emitted from moving bodies, especially, rotating bodies such as fans and rotors. Then we proposed the FDLBM with the arbitrary Lagrangian Eulerian (ALE) formulation. In this report, we simulated the acoustic waves emitted from three-dimensional rotor by the FDLBM with the ALE formulation, and good result is obtained.