Abstract
It is known that surfactant additives in wall-bounded turbulent flows yielded the significant drag reduction.In this study,we conducted PIV measurements for a turbulent boundary layer with noniomc surfactant solution injection from wall surface.The noniomc surfactant,AROMOX,which mainly consists of oleyldimethylamineoxide(ODMAO),is used.First,we compared turbulence statistics from PIV measurements with those from LDV measurements for confirming the accuracy of the present PIV results.Then,we investigated the relation between the drag reduction ratio and turbulence structures near the wall.
