Titlebook: Drag Reduction by Shock and Boundary Layer Control; Results of the Proje Egon Stanewsky,Jean Délery,Paolo Matteis Conference proceedings 20

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Synopsis of the Project EUROSHOCK IImining the design and off-design performance of transonic transport aircraft in the case of a turbulent wing but more so for laminar wings where moderate to strong shock waves may already be present at cruise conditions in order to take full advantage of the potential of laminarization. Based on the

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Introduction to the Individual Contributionswas, however, a team effort with the individual work adding up to the final product. The Synopsis is therefore followed by a more detailed description of the work performed by the various members of EUROSHOCK II, written by these members. The contributions, Chapters 11 through 24, are assembled in t

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Study of Control Devices Applied to a Transonic Shock Wave/Boundary Layer Interactionitions. Several control techniques have been investigated: 1) active control consisting in sucking a part of the boundary layer flow through a slot, 2) hybrid control, which is a combination of a passive control cavity placed underneath the shock region and a suction slot (or cavity) located downstr

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Hybrid and Active Control of Shock Wave — Turbulent Boundary Layer Interaction and Perforated Plate suction downstream of the passive control cavity is able not only to suppress separation but even to restore the boundary layer to the velocity profile shape present without control. Active control by suction through a single cavity is even more effective. The boundary layer resulting from active co

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Euler/Boundary Layer Coupling to Predict Steady and Unsteady Transonic Flows Past an Airfoil with anyer interaction in transonic flow for the reduction of both, drag and buffet effects. Applications concerned the effectiveness of suction and of a bump at Mach numbers prior to and beyond buffet onset. Good agreement with experiments has been found for the pressure distributions, while the predictio

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2D Numerical Investigations of Shock and Boundary Layer Control Techniquesnd airfoils with different devices used to control the shock boundary layer interaction phenomenon..The numerical investigations have been carried out in two phases. In a first step, steady calculations were performed in order to understand how the control devices affect the main flow and to determi

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Prediction of Transonic Airfoil/Wing Flow and Buffet with Control Using a Time-accurate Viscous-Invicid interaction codes VIS15 and VIS25 within Task 2 of EUROSHOCK II. The 2D code VIS15 has been used to study the influence of bumps, discrete suction, hybrid control, and passive and active control through perforated walls in the case of different laminar and turbulent airfoils. The time-accurate 2

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