Implementation of a Hybrid Navier-Stokes/Vortex Panel Method for ...

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Hybrid CFD (cont’d) • Coupling between near and far fields – Navier-Stokes code computes circulation on polylines about spanwise blade sections needed by Vortex panel solver – Vortex panel method computes induced velocities on boundaries of NS region computed from Biot-Savart law – Effect of blade on far field represented by lifting line, helicoidal paths from prescribed wake – These provide coupling between Navier Stokes and Vortex Panel solvers © 2008 GE All rights reserved. 6
Goals for Hybrid CFD for Wind Turbine Aero Design • Goal is to develop design system using hybrid methodology that can be routinely used by GE engineers to design wind turbine blades for optimum aero performance – Scripting of meshing, pre- and post-processing is essential – Hybrid CFD analysis in CFX must be no more difficult to set up and run than conventional analysis – Best practices established and embedded in process © 2008 GE All rights reserved. 7
Page 1 and 2: 2008 International ANSYS Conference
Page 3 and 4: Hybrid CFD for Wind Turbine Aero
Page 5: Hybrid CFD (cont’d) • Hybrid Na
Page 9 and 10: User Fortran Routines CFX provides
Page 11 and 12: Computing Circulation in CFX • Th
Page 13 and 14: Induced Velocities • The induced
Page 15 and 16: Computation of Induced Velocities
Page 17 and 18: Mesh Generation • The blade geome
Page 19 and 20: Generation of the polylines Screen
Page 21 and 22: NREL Validation Case • National R
Page 23 and 24: Sensitivity Study • Sensitivity s
Page 25 and 26: Future Work • Hybrid methodology
Page 27: Impact Hybrid CFD - Represents a un

Implementation of a Hybrid Navier-Stokes/Vortex Panel Method for ...

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