空間発展超音速境界層DNSによる乱流構造の研究(安定性・乱流乱流(1),一般講演)

概要

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Spatial direct numerical simulations are used to study the development of near-wall turbulent structures and the resultant large-scale structure evolution in a supersonic boundary layer, where the free stream Mach number is 3.0. Disturbances of compressible isotropic turbulence are superimposed on the laminar profile at the inlet boundary layer in the computational box. The Reynolds number based on the momentum thickness is up to 1400 in the turbulent boundary layer. Simulation results show that the eddy with low-momentum is growing to the supersonic turbulent boundary layer, where hairpin packets are generated. The hairpin packets are located on the low-speed elongated regions and several long low-momentum structures yield namely elongated features in the streamwise direction.
日本流体力学会の論文
2009-09-02