A formulation for the free wake analysis of helicopter rotors in incompressible potential flows is presented here. The formulation encompasses both the theory and its numerical implementation. For the case of a single-bladed rotor in hover, the formulation is validated by numerical results which are in good agreement with the generalized wake of Landdgrebe. Extension of the theory to compressible flows is also outlined. These resutls indicate that the formulation does not require any empirical assumption (such as the rate of contraction of the radius of the wake) in order to avoid numerical instabilities. To our knowledge, the results presented here are the first ones ever obtained not requiring any ad-hoc assumptions in order to avoid such problems. (Author)
Free wake aerodynamic analysis of helicopter rotors
Aerodynamische Analyse der freien Nachstroemung bei Hubschrauber-Drehfluegeln
US Government Reports ; May ; 1-99
1983
99 Seiten
Report
Englisch
A State-Space Free-Vortex Hybrid Wake Model For Helicopter Rotors
British Library Conference Proceedings | 2008
|AERODYNAMIC AND DYNAMICAL INVESTIGATIONS OF HELICOPTER ROTORS
British Library Conference Proceedings | 1998
|Aerodynamic Characteristic Analysis of Multi-Rotors Using a Modified Free-Wake Method
Online Contents | 2009
|