An experimental investigation was made of the gust field generated by
a rotating slotted cylinder installed in the Duke University low-speed
, closed-circuit wind tunnel. The system has a very simple configurati
on with low cost and can produce a controllable single or multiple har
monic gust wave in the lateral and longitudinal directions. It require
s minimal power and torque input. A simplified theoretical aerodynamic
model and a design estimation of the lateral and longitudinal gust fl
owfield is also proposed in this article. The design estimate is based
on a two-dimensional dynamic lift coefficient that is given by the th
eoretical and experimental results. An interfering wake vortex effect
is the major disadvantage of this system.