Compressible Dynamic Stall Vorticity Flux Control Using a Dynamic Camber Airfoil
MetadataShow full item record
This study reports control of compressible dynamic stall through management of its unsteady vorticity using a variable droop leading edge (VDLE) airfoil. Through dynamic adaptation of the airfoil edge incidence, the formation of a dynamic stall vortex was virtually eliminated for Mach numbers of up to 0·4. Consequently, the leading edge vorticity flux was redistributed enabling retention of the dynamic lift. Of even greater importance was the fact that the drag and pitching moment coefficients were reduced by nearly 50%. The camber variations introduced when the leading edge was drooped are explained to be the source of this benefit. Analysis of the peak vorticity flux levels allowed the determination of minimum necessary airfoil adaptation schedule.
Invited Paper Sadhana; Journal of Indian Academy of Sciences, Vol. 32, Part 1 & 2, February-April 2007, pp. 1-10.
Showing items related by title, author, creator and subject.
Nagashima, M.; Agrawal, B.N. (2012);For a large Adaptive Optics (AO) system such as a large Segmented Mirror Telescope (SMT), it is often difficult, although not impossible, to directly apply common Multi-Input Multi-Output (MIMO) controller design methods ...
Chandrasekhara, M.S. (1994-12-23);A three year effort to study the "Compressibility Effects on the Control of Dynamic Stall of Oscillating Airfoils" was funded by ARO in 1990. A fourth year extension was granted for the project. As part of this research, ...
Landry, Leslie M. (Monterey, California. Naval Postgraduate School, 2012-06);Micro-electro-mechanical systems (MEMS) inertial sensors are commonly used in applications such as inertial navigation or human motion tracking. These inertial sensors provide three-dimensional (3D) orientation, acceleration, ...