Design of a real prototype of a hybrid fuel cell suv: Vehicle "Hércules"

Abstract

An  aeromechanical  evaluation  of  large  (over  1 Mw   of   nominal   power)   Horizontal   Axis   Wind   Turbines (HAWT’s)  is  performed  is  this  paper.  The  strategy  is  based  on the combination of an aerodynamic module, which provides the three-dimensional  pressure  distribution  on  the  HAWT’s  blades, an a structural module which takes such pressure forces as input data in order to compute both, blade deformation and strain and stress distributions over the blade.

The  aerodynamic  module  combines  the  three-dimensional  non-linear   lifting   surface   theory   approach,   which   provides   the effective  incident  velocity  and  angle  of  attack  at  each  blade section,   and   a   two-dimensional   panel   method   for   steady axisymmetric   flow   in   order   to   obtain   the   3D   pressure distribution  on  the  blade.  Such  pressure  distribution  constitutes the input data for the structural module, which is a finite element package  whose  output  is  the  blade  deformation  and  strain  and stress  distribution  along  the  blade,  as  well  as  material  induced fatigue.

This methodology is applied to study a 50  m long blade able to provide a nominal power of 3 Mw.