後方ステップ背後に形成されたはく離泡から放出される大規模渦の過度特性(流体工学,流体機械)  [in Japanese] Transitional Characteristics of Large Scale Vortex Issued from Separation Bubble Formed Behind a Backward Step(Fluids Engineering)  [in Japanese]

An experimented study was carried out to study the mechanism of vortex shedding from separation bubble behind a backward step. The experiment was conducted in a circulating water tunnel, and the test body was a triangular prism. Behind the triangular prism, a horizontal plate was set to adjust the height of the separation point from the horizontal plate. The velocity field was measured by LDV systms and the ensemble averaging technique was used to study the unsteady field about vortex generating region. The visualized images were compared with the vorticity distribution and shear velocity distribution at the same phase of evolution to clarify the mechanism of the vortex shedding from the separation bubble.

An experimented study was carried out to study the mechanism of vortex shedding from separation bubble behind a backward step. The experiment was conducted in a circulating water tunnel, and the test body was a triangular prism. Behind the triangular prism, a horizontal plate was set to adjust the height of the separation point from the horizontal plate. The velocity field was measured by LDV systms and the ensemble averaging technique was used to study the unsteady field about vortex generating region. The visualized images were compared with the vorticity distribution and shear velocity distribution at the same phase of evolution to clarify the mechanism of the vortex shedding from the separation bubble.