An integrated aerodynamic–structural optimization method for wind turbine blades to enhance energy capture and deformation resistance.
Aerodynamic optimization focuses on maximizing the blade's torque by modifying the blade's shape. The optimization results show that the
For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. Editor’s Choice articles are based on recommendations by the scientific editors of MDPI journals from around the world. The aim is to provide a snapshot of some of the most exciting work published in the various research areas of the journal. The optimization framework integrates DAFoam as the computational fluid dynamics (CFD) solver, TACS as the finite element method (FEM) solver, Mphys for fluid–structure coupling, and SNOPT as the optimizer within the OpenMDAO framework. The design variables in this optimization process are the blade shape and panel thickness. The remainder of this paper starts with a literature review on the aerostructural optimization of wind turbine blades in Section 2, followed by the methodology on the aerodynamic optimization, structural optimization, and fluid–structural coupling processes of the aerostructural optimization in Section 3, and the main findings are presented and discussed in Section 4.
Our aerodynamical design integrates structural design directly and efficiently, to achieve the lowest Levelised Cost Of Energy (LCOE).
Subsequently, an aero-structural design and optimization were per- formed to reduce the blade mass/cost with more than 25% mass reduction and 30% cost reduction
This Thesis focuses on the aero-structural simulation and optimization of Darrieus Vertical. Axis Wind Turbines. Aerodynamic simulation tools based on different
20 Table 1 Main parameters of the DTU 10 MW RWT Data Value Wind class IEC 1A Rated power 10 MW Cut-in wind speed 4 m/s Cut-out wind speed 25 m/s Rotor diameter 178.3 m Hub height 119.0 m (a) Main structural components (b) Secondary core structures Figure 8 Configuration of the blade section Table 2 Extent of the structural components and their materials Component Starting section Ending section Material (% span) (% span) type External shell 0 100 Stitched triaxial -45/0/+45 fiberglass Spar caps 1 99.8 Unidirectional fiberglass First and second 5 99.8 Stitched biaxial shear webs -45/+45 fiberglass Third shear web 22 95 Stitched triaxial -45/0/+45 fiberglass Trailing and leading 10 95 Unidirectional edge reinforcements fiberglass Root reinforcement 0 45 Unidirectional fiberglass External shell core 5 99.8 Balsa Web core 5 99.8 Balsa Table 3 Material properties Material type Longitudinal Young’s Transversal Young’s Shear modulus modulus [MPa] modulus [MPa] [MPa] Stitched triaxial 21790 14670 9413 -45/0/+45 fiberglass Unidirectional 41630 14930 5047 fiberglass Stitched biaxial 13920 13920 11500 -45/+45 fiberglass Balsa 50 50 150 21 Before proceeding with the test of the aero-structural design algorithms, the RWT blade was subjected to a mono-disciplinary multi-level structural optimization performed using the current tools, in order to refine certain aspects of its design.
ASRS optimizes the blade spar cap and blade root buildup to meet strain allowable for a prescribed precone angle and designed blade deflection