By Rudibert King
This publication includes contributions offered on the lively stream regulate 2006 convention, held September 2006, on the Technische Universit?t Berlin, Germany. It encompasses a good balanced blend of theoretical and experimental cutting-edge result of energetic move keep watch over. assurance combines new advancements in actuator know-how, sensing, strong and optimum open- and closed-loop keep watch over and version aid for keep watch over.
Read or Download 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) PDF
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Additional resources 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)
6% for excitation with rectangular (left), sinusoidal (middle), and triangular wave forms (right) occurs differently. Due to the much more gentle time dependence of the force, the shear layer is gradually wind up into a large vortex during the period with upstream pointing Lorentz force. This large vortex leaves the region near the leading edge, if the Lorentz force changes sign and moves the structure downstream. Only one large vortex is shed per period. In contrast to square wave excitation, no vortex amalgamation takes place for sine and triangle waves.
In liquid metal Magnetohydrodynamics (MHD), the Lorentz force density and the ﬂow are usually strongly coupled, since the ﬂow induces currents via the u × B term in (3), these currents generate Lorentz forces (2), and the Lorentz forces change the ﬂow (1). The reason for this strong coupling is the very high electrical conductivity of liquid metals, typically σ = O(106 ) S/m. In the case of seawater or other electrolytes, σ is small (∼ 10 S/m). Therefore, the induced currents are very low for moderate applied magnetic ﬁelds (B0 ∼ 1 T).
For more details we refer to . 04 × 104 for the plate. It has been mounted between rectangular endplates made from PMMA extending from the bottom of the test section to the free surface in vertical and from 3 cm in front of the leading edge to 3 cm behind the trailing edge in horizontal direction. The angle of attack of the plate was kept constant at α = 16◦ throughout the measurements. The PIV setup consists of a Spectra Physics continuous wave Ar+ –Laser type 2020–5 as light source and a Photron Fastcam 1024PCI 100K for recording the images.