APPARATUS FOR REDUCING DRAG USING MICROSCALE AND NANOSCALE STRUCTURES, FLAPPING DEVICE USING THE SAME

摘要

Drag reduction apparatus and the winging flying object using the same are provided to reduce the drag since the groove perpendicularly to the flow direction or the microstructures of the projection shape is formed. A drag reduction apparatus comprises as follows. A plurality of grooves are formed on the surface-contacting the fluid in the laminar flow domain. The cross section of the groove is triangular. A second groove which is more minute than groove is formed in the groove valley and the cross section of the second groove is the square or trapezoidal shape.