DESIGN

Turbine design performed to ‘IEC 61400-2_013 Part 2 Small Wind Turbines’ requirements in regard to wind conditions, material requirements and safety factors. Turbine behaviour and loads modelled using in-house simulator (Cascade theory) and QBlade program (Lifting Line theory), taking into account dynamic stall, airflow curvature and turbulence effects.

01
01

In order to analyse turbine's performance and aerodynamic loads - a simulator based on Cascade Theory has been created.

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02

The results from Axowind simulator a very close to the results produced by QBlade - a simulator program from Wind Energy Group of the Berlin Institute of Technology.

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03

In the process of turbine design - Finite Element Method (PATRAN/NASTRAN) has been used, with all details of the turbine modeled. 

04
04

As for the turbine itself - the generator was also modeled using FEM in order to calculate deflections and internal loads.

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05

The stresses and strains in composite blade have been analysed as per IEC 61400-2 Part 2 "Small Wind Turbines".

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06

The dynamic characteristics of the turbine have been calculated using a FEM model which also included custom-made tower. The scope of dynamic analysis included Normal Modes, Frequency Response and Rotor Dynamics (NASTRAN).

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07

Campbell's diagram illustrates the normal modes which have been tuned to avoid resonance.