By Dietrich Knörzer (auth.), Prof. Dr.-Ing. Peter Thiede (eds.)
------------------------------------------------------------ This quantity comprises the complaints of the CEAS/DragNet eu Drag relief convention hung on 19-21 June 2000 in Potsdam, Germany. This convention, succeeding the eu Fora on Laminar circulate expertise 1992 and 1996, was once initiated by way of the eu Drag aid community (DragNet) and organised through DGLR lower than the auspice of CEAS. The convention addressed the new advances in all parts of drag relief examine, improvement, validation and demonstration together with laminar move know-how, adaptive wing thoughts, turbulent and precipitated drag relief, separation keep an eye on and supersonic circulate elements. This quantity which contains greater than forty convention papers is of specific curiosity to engineers, scientists and scholars operating within the aeronautics undefined, learn institutions or academia.
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Extra resources for Aerodynamic Drag Reduction Technologies: Proceedings of the CEAS/DragNet European Drag Reduction Conference, 19–21 June 2000, Potsdam, Germany
A surface or hole quality degradation effect was not experienced. • Even with the existing fin which was partially outside the specified values by means of surface tolerances the expected amount of laminarity was reached. • By measuring the fuel flow at constant aircraft conditions with and without suction, the expected drag reduction was proved. Overall, the results of the HLF Fin Flight Test evaluated so far are most promising. No severe show stopper for HLFC was found. g. e. e. benefit in order to ~alance efforts for the system with fuel saving.
New concepts such as spiroYds are also envisaged. Wave drag Wave drag represents only about 3 % of the total drag but should not be negleted. Basic research has been performed at ONERA on Trailing Edge Optimisation (TEO) and the bump concept as shown on Fig. 10, with application to Single Aisle Aircraft (SAA). -----------"'-'-----------+-----_ ....... AR F~ Wing tip turbine mit MU~ A320 wing tip turbine mock-up /' A320 wing tip fence A320 wing tip turbine test in S1 MA Fig. 9 - Induced drag reduction.
T. ~~ Fig. 10- Wave drag reduction. 25 International cooperation Research on drag reduction involves costly phases, such as the use of demonstrators, which require international cooperation. Examples have been given of past cooperation, in particular under the aegis of Airbus Industrie and of the European Union. Research Establishments have an increasing role to play. Already ONERA and DLR have developed very strong links. Their research on helicopters is now completely integrated. There is a single common research program to satisfy the needs of Eurocopter.
Aerodynamic Drag Reduction Technologies: Proceedings of the CEAS/DragNet European Drag Reduction Conference, 19–21 June 2000, Potsdam, Germany by Dietrich Knörzer (auth.), Prof. Dr.-Ing. Peter Thiede (eds.)