抄録
This paper describes experimental result of drag characteristics of the object with the slit. The test pieces are the column that the slit of straight, Y-type slit and clearance tapes were installed for the spiral rolls at 45. Slit width, Y-type opening angles, pitch of the spiral roll were changed. The Reynolds number is 60000. Using the smoke wind-tunnel facility, the flow visualization experiment processes image by the digital camera by the computer after the photographing.
