Aerodynamic Optimisation and Structural composite design for a Horizontal Axis Wind Turbine blade
Date Issued
2014
Date
2014
Author(s)
Jhuang, Yi-Ting
Abstract
The main purpose of this thesis is to design the strength of wind turbine blades which can sustain the wind speed 60m / s without fail. Optimize the power coefficient in aerodynamic based on the blade element momentum theory by using blade model NACA4412.The loads of blade come from the results of two-dimensional flow field analysis and three-dimensional flow field analysis. The turbulence model of two-dimensional flow field is Standard k-ε and the turbulence model of three-dimensional flow field is SST k-ω.The blades ,which are made from E-glass/expoxy、Aramid/expoxy and Graphite/expoxy three composites laminate in different combinations of fiber direction, follow the maximum stress criterion and Tsai-Wu failure criterion.
The result show, it is more conservative using three-dimensional flow field to analyze than using the two-dimensional flow field. Tsai-Wu failure criterion is more suitable for laminate failure analysis than the maximum stress failure criterion. Increasing the single layer thickness can increase the strength of the composite materials effectively in the laminate design of the blade. However, it is not necessarily that more fiber material related to higher material strength in the same total thickness.
Subjects
複合材料
風力發電機葉片
葉片最佳化
疊層設計
數值模擬
FLUENT
ANSYS
Type
thesis
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