This paper presents results from a numerical study of blade-vortex interaction (BVI) aerodynamicy and acoustics. A two-dimensional model problem was used to do the flow simulation using an Euler- and a Navier-Stokes code. For the turbulent calculations an algebraic Baldwin-Lomax and the two-equation kappa-epsilon turbulence model was used. The acoustic features of BVI in the near- and midfield were analysed with the flow simulation code and the far-field results were obtained using the three-dimensional Kirchhoff's method. Several crucial parameters of BVI, such as vortex strength, vortex miss distance, and the free stream Mach number were varied. The main difference between the inviscid and the viscous flow considerations are pointed out. A comparison with experimental data is done for the important case of a head-on collision.
Mechanisms and acoustics of blade-vortex-interactions
Aerodynamik und Schallemission infolge der Wechselwirkungen zwischen Hubschrauber-Rotorblatt und Wirbelströmung
Zeitschrift für Flugwissenschaften und Weltraumforschung ; 19 , 6 ; 397-406
1995
10 Seiten, 20 Bilder, 16 Quellen
Article (Journal)
English
Hubschrauber , Rotor (Drehflügel) , Aerodynamik , Schallemission , Wirbelströmung , Software , Simulationsmodell , Strömungsvorgang , Euler-Gleichung , Navier-Stokes-Gleichung , Turbulenz , Wirbelstärke , Mach-Zahl , Variationsrechnung , reibungsbehaftete Strömung , reibungsfreie Strömung , Vektor , Druckverteilung , Luftwiderstand , Auftrieb , Aeroakustik
Mechanisms and acoustics of Blade-Vortex-Interactions.
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