Abstract
Steady tangential blowing on a vertical tail was experimentally investigated. Two different actuation configurations, a continuous slot and discrete slots, were implemented close to the rudder hinge line. The main objective of this investigation is to increase the total side force of the vertical tail. To attain this, flow separation on the rudder, which occurs at large deflection angles, must be delayed. A secondary objective is to determine the efficiency of such configurations. The continuous slot configuration showed the overall largest increase of the side force, but at low values for the efficiency. In contrast, the discrete slot configuration demanded 34% less of the momentum coefficient compared at a similar side force. The most efficient configuration was found for discrete jets blowing locally at mid-span. Moreover, the tangential wall jets of the discrete slot configuration generate on a swept wing longitudinal vortices.
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Acknowledgements
This work is part of the collaborative research project AsSaM “Autoritätssteigerung von Steuerflächen durch aktive Maßnahmen” (grant number: 20E1513A) and funded through the German Federal Ministry for Economics and Energy (BMWi), which is gratefully acknowledged.
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Singh, V.M., Scholz, P. (2021). Circulation Control Experiments on a Vertical Tail. In: Radespiel, R., Semaan, R. (eds) Fundamentals of High Lift for Future Civil Aircraft. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 145. Springer, Cham. https://doi.org/10.1007/978-3-030-52429-6_7
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DOI: https://doi.org/10.1007/978-3-030-52429-6_7
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