IUTAM Symposium on Mechanics of Passive and Active Flow by Tomomasa Tatsumi (auth.), G. E. A. Meier, P. R. Viswanath

By Tomomasa Tatsumi (auth.), G. E. A. Meier, P. R. Viswanath (eds.)

The demand papers for the rUTAM-Symposium on Mechanics of Passive and energetic movement regulate introduced an overpowering reaction of purposes for contributions. Fi­ nally 12 invited lectures, forty eight papers and 23 posters have been chosen via thc clinical Com­ mittee to be provided within the convention. fifty eight papers are released during this quantity. because of the constrained variety of pages to be had, poster displays couldn't be thought of for ebook. The editors want to thank all of the contributors of the medical Committee for his or her very beneficial counsel. The papers offered on the rUT AM Symposium have been categorised lower than 3 teams de­ voted to • Passive regulate tools, • energetic regulate tools and • keep an eye on ideas. This was once performed to distinction before everything among the passive innovations the place the regulate energy is especially provided via the circulation itself and the lively options the place the ability is seasoned­ vided by way of exterior resources; the 3rd crew was once dedicated to regulate strategies for providing equipment of keep watch over concept and new suggestions of move control.

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Additional info for IUTAM Symposium on Mechanics of Passive and Active Flow Control: Proceedings of the IUTAM Symposium held in Göttingen, Germany, 7–11 September 1998

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Fig. 7 - Schlieren visualization of transonic flow under passi ve control conditions. ----- Fig. 8 - Principle of passiVe/active - or hybrid control- applied to a transonic interaction. SHOCK/BOUNDARY LAYER CONTROL BY VARIOUS CONCEPTS R. BOHNING AND D. STERN Institut fur Stromungslehre, Universitiit Karlsruhe (TH) KaiserstrafJe 12, 76128 Karlsruhe 1. Introduction The shock/boundary layer interaction has a strong influence on the aerodynamic behaviour of transonic wings. Therefore many research programs, such as EUROSHOCK or RaWid focus on this topic.

2. Objectives, Approach and Partners of EUROSHOPCK I and II The specific objective of the research discussed here is to investigate and devise methods of shock and boundary layer control aiming at the reduction of aircraft drag and the improvement of aircraft off-design performance, and to provide the tools needed for the design of transonic wings with control. In order to meet these objectives, the projects were essentially divided into four major research tasks: CD Modeling of Control Phenomena, 0 Prediction of Transonic Airfoil/Wing Flow with Control, Gl Wind Tunnel Experiments on Airfoils and Wings with Control and, only within EUROSHOCK II, @) Control Application Aspects.

Such a bump induces a first shock at its origin and a second shock at its trailing edge. This system affects only slightly the boundary layer, while reducing substantially the wave drag. 5. CONCLUDING REMARKS The signification of shock wavelboundary layer interaction control is ambiguous, in the sense that control can aim at minimizing the effect of the shock on the boundary layer properties or reducing the overall losses caused by the interaction, the two objectives being partly contradictory.

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