後段流れにおける段形状が再付着点距離に及ぼす影響 : 第1報, 実験

抄録

As a verification problem for computation techniques on complex geometry, such as BFC or FEM, backward-facing step flow has been investigated by varying the step geometry. Reattachment length has been measured as a main parameter. Inlet mean flow velocity and turbulence energy profiles have been measured, which will be available to the computation as an inlet boundary condition. The experiment has been carried out with five geometries and two inlet boundary conditions. The experimental results show that the reattachment length becomes shorter for a smoother step. This tendency is strong in the case of the large inlet turbulence.