Active Flow Control: Papers contributed to the Conference by Rudibert King

By Rudibert King

This publication includes contributions awarded on the lively circulate regulate 2006 convention, held September 2006, on the Technische Universit?t Berlin, Germany. It encompasses a good balanced blend of theoretical and experimental state of the art result of energetic circulation keep an eye on. assurance combines new advancements in actuator expertise, sensing, strong and optimum open- and closed-loop keep an eye on and version relief for keep watch over.

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Extra info for Active Flow Control: Papers contributed to the Conference Active Flow Control 2006, Berlin, Germany, September 27 to 29, 2006 (Notes on Numerical Fluid Mechanics and Multidisciplinary Design)

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Frequency spectra for the tagged points are presented in Fig. 8. stall already at inclination angles of about α = 5◦ [38]. Consequently, the plate is in deep stall at α = 16◦ and the large separation zone on the suction side shown in Fig. 7 results. This recirculation region extends downstream far behind the trailing edge with the maximum of backflow situated in the aft position of the plate and rearward of the trailing edge. While in all cases with excitation, separation is obviously still present, the structure of the separated region is markedly modified.

Recent developments in chaos control, microfabrication and soft computing tools are making it more feasible to perform reactive control of turbulent flows to achieve drag reduction, lift enhancement, mixing augmentation and noise suppression. Field applications, however, have to await further progress in those three modern areas. Other less complex control schemes, passive as well as active, are more market ready and are also witnessing resurgence of interest. The outlook for reactive control is quite optimistic.

Margalit et al. [25] report a distinct effect of the modulation wave form. Traditionally, the rms value of the excitation is used in active flow control applications to characterize momentum input [3]. However, supporting the above mentioned lift gain scaling with the peak momentum coefficient [22], alternative approaches are discussed as well. In reference to Chang et al. [29], Wu et al. [30] used the peak excitation velocity in the definition of their momentum coefficient. Recently, Kiedaisch et al.

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