微型风轮机叶片设计与制造

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Micro wind turbine blade design and prototype manufacturing
Blade element momentum method (BEM)
Profile for BEM (Burton,et al., Wind Energy Handbook, 2001)
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Conceptual design for small blade structure with biomaterial and manufacturing
3D-Blade profiles with SD 7037
Solid model of rotor assembly
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Micro wind turbine blade design and prototype manufacturing
Rapid prototype
Left: 3-D model; Middle: rapid prototype; Right: rapid prototype after surface treatment
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Micro wind turbine blade design and prototype manufacturing
Airfoil geometry and aerodynamics
Airfoil analysis(Manwell et al., Wind Energy Explained, 2010)
Bio-resin
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Epoxidized soybean oil (ESO) resin and PLA resin: Denmark
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ESO and a natural resin from Venonia in Ethiopia (NIMRC).
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ESO in our lab(Dr. Deka)
biomaterial and manufacturing • Micro blade mould design and manufacturing • Micro blade manufacturing with casting mould • Discussions • Conclusions
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Outline
• Micro wind turbine blade design and prototype manufacturing
• Materials for small wind turbine blade • Manufacturing of small wind turbine blades • Conceptual design for small blade structure with
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Manufacturing of small wind turbine blades
• Mechanical fabricating: CNC for wood • Hand-lay-up: glass fibre, carbon fibre and wood epoxy • Filament winding: petro-based fibre • Pultrusion of fiberglass: Bergey • Injection: Southwest Windpower • Resin Transfer Moulding (RTM): Popular • Resin infusion technology
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Conceptual design for small blade structure with biomaterial and manufacturing
Profile structure for small blade
Biocomposite design for small wind turbine blade
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Materials for small wind turbine blade
• Metal: Steel and aluminum • Glass and carbon fibre composites
Glass fibre: cheap and good properties Carbon fibre: Expensive and high properties Both petro-based and not environmental friendly
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Micro wind turbine blade design and prototype manufacturing
Promising airfoils
Airfoils geometry and thickness
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Micro wind turbine blade design and prototype manufacturing
Lift and drag coefficients
Lift coefficient at Re=6×104
Ratio of Cl /Cd at Re=6×104
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Micro wind turbine blade design and prototype manufacturing
Structure and solid model
• Wood and bamboo
• Biocomposites
Natural fibres enforced
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Flax, jute, hemp, sisal: Nottingham Innovative Manufacturing Research Centre (NIMRC)
❖Fra Baidu bibliotek
Hemp: Risϕ national Laboratory, Denmark
Design and Manufacturing of a Micro Wind Turbine Blade of Biocomposites
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Purposes
• Micro wind turbine blade design • Manufacturing exploration
Biomaterial Embedded casting