Unable to log in or get member pricing? Having trouble changing your password?

Please review our Frequently Asked Questions for complete information on these and other common situations.

Abstract
An aeromechanics investigation was conducted for the Boeing 222 proprotor test in transition orientation with the comprehensive analysis code RCAS comparing vortex wake, Viscous Vortex Particle Method (VVPM) and Helios™ (CFD) calculations. The results include the calculations of rotor trim and rotor oscillatory structural loads for a proprotor in near axial orientation at high speed, high incidence transition and helicopter-like edgewise orientation. VVPM and Helios calculations gave the same wake physics for the isolated rotor and resulted in similar hub moments and blade loads sensitivities to cyclic inputs. Helios and VVPM calculations differed during BVI wherein the lifting line model of VVPM is less accurate. Vortex Wake, without tuning, produced inaccurate rotor wake trajectories, and the low speed, high incidence calculations of trim and loads were inaccurate. Helios was used to evaluate the effect of the nacelle and tunnel walls on the trim angles. The nacelle affected the wake trajectory and impacted trim, but the changes to loads was small. Modeling the rotor in close proximity to the tunnel ceiling had the opposite affect on trim to the effect relative to the Glauert wall corrections. The effect of the tunnel wall corrections calculated by Helios was smaller than the equivalent (Glauert) correction made to VVPM.

Recently Viewed Items

• 

  Comparison of VortexWake, VVPM and CFD Aeromechanics Computations of the Boeing 222 Proprotor

  Member Price :

  $15.00

  Your Price :

  $30.00

Popular Products