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Calculating the Power of Wind Turbines with the Blade Element Momentum Theory

Laura Salcedo Campoamor

Abstract
Purpose - Conversion of a FORTRAN program of the Blade Element Momentum Theory (BEMT) into an Excel program and to show how Excel (with the Solver) can be used to optimize the geometry of the blade geometry (pitch angle, taper ratio, number of blades). --- Methodology - Literature review, work with fundamental wind energy equations, spread sheet programming. --- Findings - Various free tools are available to calculate the aerodynamic power output of wind turbines. However, a spread sheet opens up all methods and equations and offers easy access to check and change the code and to adapt to a given problem. Cone and axis angle are usually parameters to be freely chosen, because classical Horizontal Axis Wind Turbine (HAWT) have 90° cone angle and 0° axis angle. Beyond the fundamental CP-lambda curves also the curve power versus wind speed is of importance including stall behavior of the plant. --- Research Limitations - Although the aerodynamic coefficients are from 2D measurements they can be used successfully in a quasi 3D setting. Realistic results require the lift coefficient to be known well beyond the stall angle of attack. --- Practical Implications - The BEMT is made available via a spread sheet including optimization.

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Date:2017-08-18
Type of work: Master Thesis
Advisor / Examiner:Dieter Scholz
Published by:Aircraft Design and Systems Group (AERO), Department of Automotive and Aeronautical Engineering, Hamburg University of Applied Sciences
This work is part of:transparent pin for text alignment Digital Library - Projects & Theses - Prof. Dr. Scholz --- http://library.ProfScholz.de pin
 
PERSISTENT IDENTIFIER:
URN: https://nbn-resolving.org/urn:nbn:de:gbv:18302-aero2017-08-18.015 (to reach this page)
DOI:https://doi.org/10.15488/19104
ARK:https://n2t.net/ark:/13960/s2dg5hs3q2g
Associated research data:https://doi.org/10.7910/DVN/BI1LSE    (Program)
URLs registered with URN: Show all links associated with this text!
 
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Keywords, German (GND): Windenergie,   Windturbine,   Aerodynamik,   Tabellenkalkulation
Keywords, English (LCSH): Wind power,   Wind turbines,   Aerodynamics,   Computational fluid dynamics
Keywords, free: Fluid dynamics, FORTRAN (Computer program language), Wind energy conversion systems, Wind turbines--Aerodynamics, Lift (Aerodynamics), Aerofoils, blade, Blade Element Theory, Blade Element Momentum Theory, Vortex Theory, Strip Theory, CFD, BEMT, WECS
DDC: 629.13,    621.312136,    629.1323,    518
RVK: ZO 5410

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Prof. Dr.-Ing. Dieter Scholz, MSME
E-Mail see: http://www.ProfScholz.de

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SALCEDO CAMPOAMOR, Laura, 2017. Calculating the Power of Wind Turbines with the Blade Element Momentum Theory. Master Thesis. Hamburg University of Applied Sciences, Aircraft Design and Systems Group (AERO). Available from: https://nbn-resolving.org/urn:nbn:de:gbv:18302-aero2017-08-18.015 [viewed YYYY-MM-DD].

Major results / graphical abstract:
Major results / graphical abstract
Results from the Excel program: Blade geometry (taper, twist), CP-λ-curves, ...

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LAST UPDATE:  15 June 2025
AUTHOR:  Prof. Dr. Scholz
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