円筒境界層の遷移に及ぼす流入攪乱の影響(境界層・せん断流・遷移(2),一般講演)

概要

論文の詳細を見る
Spatial direct numerical simulations are used to study the development of turbulent structures and the resultant sound emission mechanism in a compressible boundary layer, for a high-speed train model conducted in a moving model facility, where the free stream velocity is 500Km/h (corresponding Mach number is 0.41). Disturbances of compressible isotropic turbulence are superimposed on the laminar profile at the inlet boundary layer in the computational box. The Reynolds number at the inlet based on the displacement thickness is 1640, which meets the measurement of the boundary layer undergoing transition. Simulation results show that the inlet disturbances affect the transition and the low-frequency disturbances in a subsonic cylindrical boundary layer.
日本流体力学会の論文
2008-09-04