Experimental and Numerical Investigation of Flow Control Using a Novel Active Slat

An active slat is developed to increase the lift and delay
the separation for a DU96-W180 airfoil. The active slat is a fixed slat
that can be closed, fully opened or intermittently opened by a rotating
vane depending on the need. Experimental results show that the active
slat has reduced the mean pressure and increased the mean velocity
on the suction side of the airfoil for all positive angles of attack,
indicating an increase of lift. The experimental data and numerical
simulations also show that the direction of actuator vane rotation can
influence the mixing of the flow streams on the suction side and
hence influence the aerodynamic performance.

• Basman Elhadidi
• Islam Elqatary
• Osama Mohamady
• Hesham Othman

• Active slat
• flow control.

[1] R. Petz and W. Nitsche, “Designing actuators for active separation control
experiments on high-lift configuration,” in Active Flow Control, R. King,
Ed. Springer Berlin Heidelberg, 2007.
[2] A. Glezer, “Some aspects of aerodynamic flow control using synthetic-jet
actuation,” Philosophical Transactions of the Royal Society A:
Mathematical, Physical and Engineering Sciences, vol. 369, no. 1940.
[3] D. Seifertm A., Greenblatt and I. Wygnanski, “Active separation control:
an overview of reynolds and mach numbers effects,” Aerospace Science
and Technology, vol. 8, no. 7.
[4] S. T. Jukes, T. and H. Furutani, “Flow control on a naca 4418 using
dielectric-barrier-discharge vortex generators,” AIAA Journal, vol. 51,
no. 2.
[5] G. A. Brehm, C. and H. Fasel, “Open-loop flow-control investigation for
airfoils at low reynolds number,” AIAA Journal, vol. 51, no. 8.
[6] M. R. Raju, R. and L. Cattafesta, “Dynamics of airfoil separation control
using zero-net mass-flux forcing,” AIAA Journal, vol. 46, no. 12.
[7] G. B. Schatz, M. and F. Thiele, “Computational investigation of separation
control for high-lift airfoil flow,” in Active Flow Control, R. King, Ed.
Springer Berlin Heidelberg, 2007