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Ahmadi-Baloutaki, M.1, Sedaghat, A.2, Saghafian, M.3 and Badri, M. A4*, Control of Transition over Aerofoil Surfaces using Active Suction, International Journal of Flow Control, Volume 5 · Number 3+4 · 2013, pp. 187-200.
Control of Transition over Aerofoil Surfaces using Active Suction
Ahmadi-Baloutaki, M.1, Sedaghat, A.2, Saghafian, M.3 and Badri, M. A4*
1PhD student, Department of Mechanical Engineering, University of Windsor, Ontario N9B
3P4, Canada. ahmadim@uwindsor.ca
2Assistant professor, Department of Mechanical Engineering, Isfahan University of
Technology, Isfahan 84156-8311, Iran. Sedaghat@cc.iut.ac.ir
3Assistant professor, Department of Mechanical Engineering, Isfahan University of
Technology, Isfahan 84156-8311, Iran. Saghafian@cc.iut.ac.ir
4,*Assistant professor, Research Institute for Subsea Science & Technology, Isfahan
University of Technology, Isfahan 84156-8311, Iran.
malbdr@cc.iut.ac.ir (Corresponding author)
[Received date; Accepted date] – to be inserted later
ABSTRACT
The linear stability based on Orr-Sommerfeld equations and the eN method was employed
to determine the onset and control of transition over VFW-VF-2 and NACA653-018
aerofoil sections. For the VFW-VF-2 aerofoil, the effects of active suction on shockboundary
layer interaction were investigated. An enhanced lift to drag ratio was obtained
for incidence angles below 6 degrees using suction coefficient as tiny as 0.0006. A
parametric study were conducted to show the effects of the suction slot location, suction
inclination angle and the extent of sucked flow through slots for flows around the
NACA653-018 aerofoil. It was observed that transition was delayed regardless of suction
positions. However, maximum delay in transition occurred when the sucked region was
located between a critical point and the transition point. For all the cases studied here, lift
to drag ratio was increased using active surface suction.
Key Words: Transition control; Laminar flow control; Active surface suction; Transonic;
Aerofoil
Journal Papers
Month/Season:
December
Year:
2013
File:
