K.-H. Hierholz, S. Wagner

A helicopter rotor in forward flight is a complex and strongly coupled aerodynamic-dynamic system, where the interaction of airloads and rotor dynamics determines the flight mechanics and stability of the helicopter. To investigate the coupled aeroelastic behaviour in hover and forward flight, a numerical simulation method has been developed. The compressible, unsteady and transonic flow in forward flight is described with the 3-D Finite-Volume Euler CFD Code INROT using a chimera overlapping embedded grid technique. the aerodynamic code is coupled with a structural dynamic code which provides blade movement and deformation. The solution of the coupled problem is found through a staggered procedure in which the two fields are integrated in time, the positions and velocities of the structural domain and the surface pressure of the fluid domain are exchanged after each time step. An efficient 3-D dynamic grid algorithm as weil as a geometric conservative formulation of the Euler Equations for dynarnic grids have been implemented. First results of coupled calculations are shown for the 5-bladed Hughes-500 Rotor in hover andin 100 kt forward flight.

Aeroelastik-Tagung der DGLR; Göttingen 1998

Conference Paper

deutsch

14,8 x 21,0 cm, 11 Seiten

DGLR-Bericht, 1998, 1998-01, Aeroelastik-Tagung der DGLR - Tagungsband; S.397-407; 1998; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

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1998