Skip to main content

Research Repository

Advanced Search

Flow response to rapid morphing flap deflection

Abdessemed, Chawki; Yao, Yufeng; Bouferrouk, Abdessalem; Narayan, Pritesh

Authors

Yufeng Yao Yufeng.Yao@uwe.ac.uk
Professor in Aerospace Engineering



Abstract

Flow response to rapid morphing flap deflection is
investigated at a Reynolds number based on chord of
0.62×10^6 for a 2D NACA 0012 airfoil fitted with a
morphing Trailing-edge flap (TEF) at a range of angles
of attack and morphing frequencies. The study was
performed using a framework developed based on
combining an unsteady parametrization method and
dynamic mesh scheme integrated within the software
ANSYS Fluent. Turbulence closure was provided using
a hybrid RANS-LES turbulence model to capture smallscale
eddies for in-depth flow analysis. Time histories of
lift and drag coefficients were found to be proportional to
the morphing frequency. Contrary to the lift, the drag
experienced an overshoot in its instantaneous values
resulting in instantaneous efficiency loss before relaxing
to a steady state. Qualitative analysis showed that some
similarities exist between rapid morphing and ramp-type
pitching motion. Specifically, the morphing flap induces
upstream propagating turbulent structures, which
interacts with a laminar separation bubble near the
leading edge resulting in dynamic stall.

Citation

Abdessemed, C., Yao, Y., Bouferrouk, A., & Narayan, P. (2019, March). Flow response to rapid morphing flap deflection. Paper presented at 54th 3AF International Conference on Applied Aerodynamics

Presentation Conference Type Conference Paper (unpublished)
Conference Name 54th 3AF International Conference on Applied Aerodynamics
Start Date Mar 25, 2019
End Date Mar 27, 2019
Acceptance Date Mar 26, 2019
Peer Reviewed Not Peer Reviewed
Keywords moprhing, wing, airfoil, CFD, aerodynamics, active flow control, flap, RANS, LES, Hybrid, dynamic mesh, dynamic stall, off-design conditions
Public URL https://uwe-repository.worktribe.com/output/850073
Additional Information Title of Conference or Conference Proceedings : 54th 3AF International Conference on Applied Aerodynamics