PlySim


60kW Vertical Axis Wind Turbine

PlySim were contracted to perform the aerodynamic design, performance prediction, structural design and analysis for a 60kW vertical axis wind turbine (VAWT). Analyses were performed to IEC61400-2 Small Wind Turbines Standard with Markov Matrix fatigue analysis to Germanischer Lloyd Guidelines for the Certification of Wind Turbines.

Performance Model

A performance model was created based on Blade Element Momentum theory. A torque balance of the VAWT aerodynamic torque and generator torque was calculated. A single stream tube encompassing the entire turbine was defined, within which a momentum balance was calculated in order to calculate axial induction factors.

An aerodynamic design report was produced detailing the analyses performed and results.


Structural Design and Analysis

Structural design and analysis was performed, in the first instance, with PlySim's in-house blade design program which performs a 2D sectional analysis at multiple analysis stations along the blade for fast and easy laminate optimisation.

A finite element model of the blade was then created in order to verify peak strains, deformations, natural frequencies and buckling reserve factors.

A structural design report was produced detailing the analyses performed and results.

A full set of laminate drawings was provided including laminate schedule, local reinforcements and bonding and bolting attachment details.