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Investigation Of Different Airfoils on Outer Sections of Large Rotor Blades
Mälardalens högskola, Akademin för innovation, design och teknik.
Mälardalens högskola, Akademin för innovation, design och teknik.
2012 (engelsk)Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
Abstract [en]

Wind power counts for roughly 3 % of the global electricity production. In the chase to produce greener power, much attention lies on getting more electricity from the wind, extraction of kinetic energy, with help of wind turbines. Wind turbines have been used for electricity production since 1887 and have since then developed into more efficient designs and become significantly bigger and with a higher efficiency.

The operational conditions change considerably over the rotor length. Inner sections are typically exposed to more complex operational conditions than the outer sections. However, the outer blade sections have a much larger impact on the power and load generation. Especially here the demand for good aerodynamic performance is large.

Airfoils have to be identified and investigated on mid/outer sections of a 7.0 MW rotor with 165 m diameter. Blade performance criteria were determined and investigations like sensitivity analysis were made. With the use of XFLR5 (XFoil) and Qblade, the airfoils were made into a blade and tested with the blade element momentum theory. This simulation gave detailed information regarding performance and operational loads depending on the different airfoils used. These results were then validated in a professional aero-elastic code (Flex5), simulating steady state, turbulent and wind shear conditions.

The best airfoils to use from this reports airfoil catalogue are the NACA 63-6XX and NACA 64-6XX. With the implementation of these airfoils, blade design 2 and 3 have a very high performance coefficient compared to large commercial HAWT rotors. 

sted, utgiver, år, opplag, sider
2012. , s. 117
Emneord [en]
wind, turbine, Rotor, Blade, HAWT
HSV kategori
Identifikatorer
URN: urn:nbn:se:mdh:diva-15293OAI: oai:DiVA.org:mdh-15293DiVA, id: diva2:551680
Fag / kurs
Aeronautical Engineering
Presentation
2012-06-14, gamma, Mälardalens Högskola, Västerås, 22:47 (engelsk)
Uppsök
Technology
Veileder
Examiner
Tilgjengelig fra: 2012-09-12 Laget: 2012-09-11 Sist oppdatert: 2012-09-12bibliografisk kontrollert

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