TEAM AIRZOOKA FIVE MAE 101A Summer 1, 2011 Seungmin Go Young Jin Kim Minjea Lee Hyung Jin O Seung Hyo Lee

BY MAKING AIRZOOKA, EXPERIENCE REAL TURBULENCE WHAT’S THE PURPOSE OF MAKING AN AIRZOOKA ? BY MAKING AIRZOOKA, EXPERIENCE REAL TURBULENCE

WHAT’S TURBULENCE ? TURBULENCE IS DEFINED AS AN EDDY-LIKE STATE OF FLUID MOTION WHERE THE INERTIAL VORTEX FORCES OF THE EDDIES ARE LARGER THAN ANY OTHER FORCES THAT THAT TEND TO DAMP THE EDDIES OUT.

YOU WILL MEET TWO MORE SECRET GUNS IN CLASS HAHA ;) AIRZOOKA FIVE ? ? YOU WILL MEET TWO MORE SECRET GUNS IN CLASS HAHA ;)

MAKING PROCESS

MAKING PROCESS

COMMON COMPONENTS Tube Front Spring Plastic bag Handle

Uses super strong springs PLUMBINGZOOKA BY SEUNG HYO LEE Uses super strong springs and a plumbing tube

generates mega turbulence BUCKETZOOKA BY MINJEA LEE Using a bucket, generates mega turbulence

TURBOGUN BY SEUNGMIN GO Brush handle, user friendly gun

ACEZOOKA BY HYUNG JIN O Fun, yet powerful ?

PING-PONG-ZOOKA BY YOUNG JIN KIM Extra fun with a ping pong ball

Airzooka fluid mechanics Vorticity is produced in the nozzle boundary layer by viscous stresses The boundary layer grows by vorticity diffusion until it reaches the Kolmogorov scale (ν3/ε)1/4 where inertial vortex forces produce turbulence An airball is produced by spin rate Ω stabilized turbulent boundary layers rolling up like a wingtip vortex Vortex breakdown occurs when (ε/Ω3)1/2 exceeds the size of the airball