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Internship Vestas Wind system A/S : steady blade element momentum code for wind turbine design validation tool

Widjanarko, Stephanus M.D. (2010) Internship Vestas Wind system A/S : steady blade element momentum code for wind turbine design validation tool.

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Abstract:Efficient wind power generation is essential to compete with fossil fuel based power generation. The blade design problem is a balance of aerodynamic efficiency, loads, cost and mass with a large number of design variables associated to both internal and external shape and strong coupling among them. This introduces a need for a large number of iterations during the design process. The need of having tools that can be tuned becomes crucial. The objective of this assignment is to write low order accuracy code to evaluate wind turbine design especially blade design. Steady Blade Element Momentum (BEM) method is chosen for this assignment. Steady BEM is a very simplified model which combines 1 dimensional momentum theory and sectional theory from aircraft industries. Certainly, this model has many drawbacks because of the simplification in the derivation. Complex flow field around a wind turbine blade is assumed to be steady, rigid blade, uniform and straight incoming flow in BEM derivation. To consider this simplification, several corrections are implemented in the original BEM derivation. The tool is written in python programming language. The code is written in object oriented approach so that it is easier to modify or add some features if necessary later. The tool is then tested on NREL UAE Phase VI wind turbine. Several relevant parameters are then compared to see the different corrections which are implemented.
Item Type:Internship Report (Master)
Vestas Wind Systems A/S
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Sustainable Energy Technology MSc (60443)
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