By George T. K. Woo, Ari Glezer (auth.), Rudibert King (eds.)
This quantity provides an up to date and good balanced blend of theoretical and experimental cutting-edge result of lively circulation regulate. It combines new advancements optimum open- and closed-loop keep an eye on and version aid for keep an eye on. Numerical and experimental purposes are thought of from aeronautics, ground-based automobiles, turbo-machinery and combustors. The contributions to this publication have been awarded on the convention energetic circulate regulate II, held could 26-28, 2010, on the Technische Universität Berlin, Germany.
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Extra resources for Active Flow Control II: Papers Contributed to the Conference ”Active Flow Control II 2010”, Berlin, Germany, May 26 to 28, 2010
10). The highest value for the actuator efficiency was obtained for an angle of attack of α = 2◦ . Furthermore, the efficiency is reduced considerably for α = 4◦ . The reason for this can be seen in the reduction in lift for an angle of attack greater than approximately 3◦ , see Fig. 7. In addition to the amplitude of excitation, the effect of the frequency on the flow field was investigated. Figure 11 shows a contour plot of Δ C¯L (left) and a plot of Δ C¯D (right) as a function of the dimensionless frequency and the momentum coefficient.
A quasi-steady control approach only works at very slow maneuvering speeds, because the static response maps become highly inaccurate in dynamic situations for both the aerodynamic loads and the response to actuation.  on a 3D wing. Relaxation times of the flow from the actuator’s initial transient to the final steady state were found to be on the order of O(5-10 t+), where t+ is the convective time scale, which is time normalized by the external flow speed, U, and the chord length of the wing or flap model, c.
Proc. : Oscillatory blowing: a tool to delay boundary layer separation. AIAA J. : Delay of airfoil stall by periodic excitation. J. : Controlled Transients of Flow Reattachment over Stalled Airfoils. Int. J. : Flow Transients Induced on a 2D Airfoil by Pulse-Modulated Actuation. : Active management of naturally separated flow over a solid surface. Part 1. The forced reattachment process. J. Fluid Mech. : Active management of naturally separated flow over a solid surface. Part 2. The separation process.
Active Flow Control II: Papers Contributed to the Conference ”Active Flow Control II 2010”, Berlin, Germany, May 26 to 28, 2010 by George T. K. Woo, Ari Glezer (auth.), Rudibert King (eds.)