A combined Eulerian/Lagrangian approach to calculating helicopter rotor flows with concentrated vortices is described. The method computes a general evolving vorticity distribution without any significant numerical diffusion. Concentrated vortices can be accurately propagated over long distances on relatively coarse grids with cores only several grid cells wide. The method is demonstrated for a blade/vortex impingement case in 2D and 3D where a vortex is cut by a rotor blade, and the results are compared to previous 2D calculations involving a fifth-order Navier-Stokes solver on a finer grid.
An Eulerian/Lagrangian method for computing blade/vortex impingement
AHS International Specialists'' Meeting on Rotorcraft Basic Research ; 1991 ; Atlanta, GA, United States
1991-01-01
Aufsatz (Konferenz)
Keine Angabe
Englisch
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