[MBDyn-users] 2-D look-up table for bluff body aerodynamics

Hoff, Stefan van 't Stefan.van.t.Hoff at nlr.nl
Tue Jul 20 08:27:37 CEST 2010


LS,

I want to achieve helicopter fuselage aerodynamics in MBDyn based on 2-D look-up tables. I require 6 outputs (3 force coefficients and 3 moment coefficients), as a function of two inputs (angle of attack and angle of sideslip). Multiplied by the dynamic pressure (density and velocity dependent), this should give the forces and moments.

As far as I can tell there is currently no aerodynamic component that can do this. The aircraft instruments element could provide the two inputs required. Performing the 2-D table lookup required to derive the forces and moments should then be straightforward (similar to the aerodynamic body component, substituting the Mach number dependency by another angle).

Is the aircraft instruments element currently able to properly determine the aircraft angle of attack and sideslip? If so, could the aerodynamic body component be somehow manipulated to achieve the above?

Regards,

Stefan van 't Hoff


National Aerospace Laboratory - NLR

Ir. S.C. (Stefan) van 't Hoff

Phone
+31(0)20 511 3018

E-mail
Stefan.van.t.Hoff at nlr.nl

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