Aerodynamic research relating to modern helicopters includes the study of three-dimensional, unsteady, nonlinear flow fields. A selective review is made of some of the phenomenon that hamper the development of satisfactory engineering prediction techniques, but which provides a rich source of research opportunities: flow separations, compressibility effects, complex vortical wakes, and aerodynamic interference between components. Several examples of work in progress are given, including dynamic stall alleviation, the development of computational methods for transonic flow, rotor-wake predictions, and blade-vortex interactions. (Author)
Special Opportunities in Helicopter Aerodynamics
1983
34 pages
Report
Keine Angabe
Englisch
Aircraft , Aerodynamics , Helicopters , Rotor blades(Rotary wings) , Interference , Unsteady flow , Stalling , Wake , Vortices , Flow fields , Three dimensional flow , Flow separation , Transonic flow , Interactions , Aerodynamic forces , Aeronautical engineering , Numerical methods and procedures , Blade tips , Aerodynamic interference , Retreating blade stall
Special opportunities in helicopter aerodynamics
NTRS | 1983
|Special Opportunities in Helicopter Aerodynamics
NTIS | 1983
|Special opportunities in helicopter aerodynamics
NTRS | 1986
|NTIS | 1972
|TIBKAT | 1972
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