Spatial Arrangement of a Counter-Rotating Dual Rotor Wind Turbine

EasyChair Preprint 10016

Abstract

During our research, we examined some layouts for a CO-DRWT. In these spatial arrangements, we
were able to change the second rotor’s axial and radial positions. Within two in axial and one diameter
in the radial region, we were running CFD (Computational Fluid Dynamics) simulation to determine the
interaction of the two turbines and for calculating the overall power coefficient (cp) for the two rotors.
Meanwhile, in our analysis, we defined some spatial arrangements where the CO-DRWT’s overall cp is
less than the cp of a Single Rotor Wind Turbine (SRWT) from the same geometry. We also defined
regions where the CO-DRWT’s cp is higher than the SRWT’s. With our geometry and with our
simulation’s boundary conditions we find the optimal place for operating a CO-DRWT is the R = 0D
radial distance with A = 2.1D axial distance (where the D is the rotor’s diameter) where the cp is 0.514,
also the worst arrangement is the R = 0.35D with A = 1.25D where the cp = 0.354, while an SRWT’s cp
from the same geometry is 0.377. According to our simulations, the energy density and the power
coefficient of an optimized CO-DRWT are 1.363 times higher than an SRWT has.

Keyphrases: CFD, CO-DRWT, DOE, Design of Experiments, Optimisation, dual rotor wind turbine

@booklet{EasyChair:10016,
  author    = {Csaba Hetyei and Ildiko Molnar and Ferenc Szlivka},
  title     = {Spatial Arrangement of a Counter-Rotating Dual Rotor Wind Turbine},
  howpublished = {EasyChair Preprint 10016},
  year      = {EasyChair, 2023}}