| Issue |
Volume 7, 2015
Progress in Flight Physics – Volume 7
|
|
|---|---|---|
| Page(s) | 229 - 244 | |
| Section | Flow control | |
| DOI | https://doi.org/10.1051/eucass/201507229 | |
| Published online | 08 June 2015 | |
Numerical and experimental investigation of slot-blown air over a cylinder
1
Université Libre de Bruxelles, Faculté des Sciences Appliquées Aero-Thermo-Mechanics Laboratory CP165/43, 50 F. D. Roosevelt Avenue, Brussels B-1050, Belgium
2
Université de Liège, Département d'Aérospatiale et Mécanique BAT: B52/3, 1 Chemin des Chevreuils, 4000 Liège 1, Belgium
3
Sagita 37 Avenue de l'Indépendance, Wandre 4020, Belgium
The paper investigates the concept of directional control of helicopters without tail rotor by means of the Coandă effect. Slot-blowing around a a cylinder in a steady flow is modeled computationally, using the unsteady k-ω shear stress transport (SST) solver in NUMECA, as well as experimentally in the wind tunnel of the Université de Liège. While the concept, in general, is promising, it is shown that there are some potential problems, including pitch-yaw coupling and some unsteady flow conditions. These problems exist under various circumstances and are due, at least, in part, due to the complicated flow-field that governs this problem, even in two dimensions.
© Owned by the authors, published by EDP Sciences, 2015