Active Flow Control

1. Front Matter

   Pages I-XIII

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2. The Taming of the Shrew: Why Is It so Difficult to Control Turbulence?

   1. The Taming of the Shrew: Why Is It so Difficult to Control Turbulence?

      • Mohamed Gad-el-Hak

      Pages 1-24

3. Actuators

   1. Front Matter

      Pages 25-25

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   2. Electromagnetic Control of Separated Flows Using Periodic Excitation with Different Wave Forms

      • Christian Cierpka, Tom Weier, Gunter Gerbeth

      Pages 27-41

   3. Pulsed Plasma Actuators for Active Flow Control at MAV Reynolds Numbers

      • B. Göksel, D. Greenblatt, I. Rechenberg, Y. Kastantin, C. N. Nayeri, C. O. Paschereit

      Pages 42-55

   4. Experimental and Numerical Investigations of Boundary-Layer Influence Using Plasma-Actuators

      • S. Grundmann, S. Klumpp, C. Tropea

      Pages 56-68

   5. Designing Actuators for Active Separation Control Experiments on High-Lift Configurations

      • Ralf Petz, Wolfgang Nitsche

      Pages 69-84

   6. Closed-Loop Active Flow Control Systems: Actuators

      • A. Seifert

      Pages 85-102

4. State Estimation and Feature Extraction

   1. Front Matter

      Pages 103-103

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   2. State Estimation of Transient Flow Fields Using Double Proper Orthogonal Decomposition (DPOD)

      • Stefan Siegel, Kelly Cohen, Jürgen Seidel, Thomas McLaughlin

      Pages 105-118

   3. A Unified Feature Extraction Architecture

      • Tino Weinkauf, Jan Sahner, Holger Theisel, Hans-Christian Hege, Hans-Peter Seidel

      Pages 119-133

5. Air Foils

   1. Front Matter

      Pages 135-135

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   2. Control of Wing Vortices

      • I. Gursul, E. Vardaki, P. Margaris, Z. Wang

      Pages 137-151

   3. Towards Active Control of Leading Edge Stall by Means of Pneumatic Actuators

      • C. J. Kähler, P. Scholz, J. Ortmanns, R. Radespiel

      Pages 152-172

   4. Computational Investigation of Separation Control for High-Lift Airfoil Flows

      • Markus Schatz, Bert Günther, Frank Thiele

      Pages 173-189

   5. Steady and Oscillatory Flow Control Tests for Tilt Rotor Aircraft

      • M. Schmalzel, P. Varghese, I. Wygnanski

      Pages 190-207

6. Cavities

   1. Front Matter

      Pages 209-209

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   2. Reduced-Order Model-Based Feedback Control of Subsonic Cavity Flows — An Experimental Approach

      • M. Samimy, M. Debiasi, E. Caraballo, A. Serrani, X. Yuan, J. Little et al.

      Pages 211-229

   3. Supersonic Cavity Response to Open-Loop Forcing

      • David R. Williams, Daniel Cornelius, Clarence W. Rowley

      Pages 230-243

7. Bluff Bodies

   1. Front Matter

      Pages 245-245

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The dramatically increasing requirements of mobility through road-, rail- and airborne transport systems in the future necessitate non-evolutionary impro- ments of transportation systems. Without severe implications concerning the environment or restrictions concerning the performance, these requirements will only be met by a concerted action of many disciplines. It is believed that with ACTIVE FLOW CONTROL a key technology exists to supply an important block in the mosaic to be laid in the pursuit of best and sustainable solutions. Manipulation of ?uid ?ows is highly advantageous in many cases. Aerodynamic or?uid?owsaroundorinsidebodies imposedrag,liftandmoments onthebody, removeor supply energy by convection. Flow-induced noise may be produced by the interaction of a body with the surrounding air. Moreover, the interaction with the body changes the state of the ?ow drastically. A neatly aligned laminar ?ow around a wing of an aircraft giving enough lift, can become highly irregular and separatedfrom the surface,with the result of a loss of lift. For cooling of - gines of transportand other systems highly irregular turbulent ?uid ?ows across the components are needed to guarantee a large heat transfer. In future engines of airplanes complying for example with the EU Vision 2020 an increased heat transfer, on the other hand, has to be avoided by all means in some parts of the engine. Turbine stages may be exposed here to extremely hot gases, needed for highe?ciency,whichwoulddestroythe blades. Inthis application,morelaminar ?ow regimes would be advantageous yielding a poorer heat transfer. Theirregular?owinacombustore. g.

• Actuators
• Air Foils
• Bluff Bodies
• Cavities
• Combustors
• Drag Reduction
• Open and closed-loop control
• Turbomachines
• actuator
• architecture
• model
• stability

• Institut für Prozess- und Anlagentechnik FG Mess- und Regelungstechnik, Technische Universität Berlin, Berlin, Germany

  Rudibert King

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