C235 大規模縦渦構造の崩壊による遷音速翼列流れの三次元非定常挙動

概要

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Three-dimensional and unsteady flow phenomena due to the breakdown of the tip leakage vortex in a transonic axial compressor rotor NASA Rotor 37 have been investigated by an unsteady Navier-Stokes flow simulation with a two-equation (k-ω) turbulence model. The simulation shows that the spiral-type breakdown of the tip leakage vortex is caused by the interaction between the vortex and the shock wave at a near-stall condition. Downstream of the breakdown onset, the tip leakage vortex twists and turns violently with time, thus interacting with the pressure surface of the adjacent blade. This self-sustained oscillation of the tip leakage vortex gives rise to the large fluctuation of the three-dimensional separation structure on the blade suction surface.
日本流体力学会の論文
2001-07-31