- Country Profiles
- About TRIP
Wings of modern aircraft are thin and streamlined, thus ensuring maximum aerodynamic efficiency. From a structural viewpoint a thick wing would be more efficient in carrying the load. The tendency of increasing aircraft size shifts the design balance towards giving more weight to structural considerations. As a result, improving the aerodynamics of thick wings is essential for further progress in aviation.
Trapping vortices is a technology for preventing vortex shedding and reducing drag in flows past bluff bodies. Large vortices forming in high-speed flows past bluff bodies tend to be shed downstream, with new vortices forming in their stead.This leads to an increase in drag and unsteady loads on the body, and produces an unsteady wake. If the vortex is kept near the body at all times it is called trapped.
A trapped vortex could be just a steady separation eddy above an aerofoil at high angle of attack, but the use of a vortex cell helps. Practical implementation of the trapped-vortex idea is difficult, since the trapped vortex needs to be almost steady in the sense that it should remain in the close vicinity of the body. Stabilising a trapped vortex was a major challenge for the project.
VortexCell2050 aimed at combining the trapped-vortex technology with active flow control. The specific major objectives of the project were:
The project work, aimed at advancing the vortex-cell technology, can be grouped in two large parts.
The results obtained generally meet the objectives specified at the start of the project, and provide the solution to the problem initially addressed, namely:
The results obtained in the project provide a significant step forward as compared to the state of the art. In particular, the development of the software tool for optimising the shape of the vortex cell, the significant body of data on three-dimensional effects collected, and the significant body of data obtained on the actively controlled flows past airfoils should be distinguished.
Université Bordeaux 1
Technische Universität München (TUM)
Politecnico di Torino;
Centro Italiano Ricerche Aerospaziali S.C.p.A. (CIRA);
Piaggio Aero Industries S.p.A.
Technische Universiteit Eindhoven
Battery Company RIGEL;
Institute of Mechanics of the Moscow State University
University of Southampton;
Mr Sergei I. Chernyshenko
University of Southampton
SO17 1BJ Southampton
Tel: +44 2380 594894
Fax: +44 2380 593058
TRIP is funded by the European Commission's Directorate General for Mobility and Transport under the Seventh Framework Programme for Research and Technological Development (FP7).