By George T. K. Woo, Ari Glezer (auth.), Rudibert King (eds.)
This quantity provides an up-to-date and good balanced mix of theoretical and experimental cutting-edge result of energetic circulate regulate. It combines new advancements optimum open- and closed-loop regulate and version relief for regulate. Numerical and experimental purposes are thought of from aeronautics, ground-based autos, turbo-machinery and combustors. The contributions to this ebook have been awarded on the convention lively movement regulate II, held may possibly 26-28, 2010, on the Technische Universität Berlin, Germany.
Read Online or Download Active Flow Control II: Papers Contributed to the Conference ”Active Flow Control II 2010”, Berlin, Germany, May 26 to 28, 2010 PDF
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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
2 Controller Performance in Experiments Step input changes in the freestream speed were used to test the controller. 4N. Figure 9 shows the phase-averaged lift response over 50 cycles of the controlled case along with the uncontrolled lift. Oscillations in lift occur when the flow speed transient occurs, but these oscillations are damped over time. 05N. 28 D. Williams et al. Fig. 9 Step response of lift at U = 7 m/s with and without control (left). Phase averaged velocity 1/ 2 signal (top right) and control input signal, C pj , (bottom right).
Computational Evaluation of Directed Synthetic Jets for Dynamic Stall Control. : Experimental and Numerical Investigations of Dynamic Stall on a Pitching Airfoil. : Transitory Control of a Pitching Airfoil using Pulse Combustion Actuation. : Transitory Separation Control over a Stalled Airfoil. : Transient Control of Separating Flow over a Dynamically-Pitching Airfoil. : Post Stall Flow Control on an Airfoil by Local Unsteady Forcing. JFM 371, 21–58 (1998) Unsteady Lift Suppression with a Robust Closed Loop Controller David Williams, Wesley Kerstens, Jens Pfeiffer, Rudibert King, and Tim Colonius* Summary.
The ability to control random inputs is an important step toward developing gust suppression controllers. Unsteady Lift Suppression with a Robust Closed Loop Controller 29 Fig. 11 Randomized input velocity. The lift response with and without control (top) shows suppression of the lift fluctuations. The corresponding freestream velocity signal (bottom left) and the control input signal C 1pj/ 2 (bottom right) are shown. 5 Conclusions A robust controller was designed with the objective of suppressing freestream flow oscillations over a wide range of unsteady flow conditions in benchmark experiment with a 3D wing.
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.)