境界層内に設置された正四角錐体に作用する抗力と渦構造

抄録

Effect of setting and apex angles on the flow drag acting on a pyramid placed in boundary layers has been investigated experimentally. Flow drag was measured by drag balance and flow patterns were examined by oil film method. Drag coefficient takes minimum value for certain range of setting angle. Some characteristic lengths were defined based on oil film observations. Possible behavior of vortical motion and separation or reattachment flows are correlated with the variation of drag coefficient due to setting and apex angles.