3D空氣動力理論修正水平軸式風力機葉片之設計

HAWT Blade Design with 3D Aerodynamic Theory Corrections

陳立信(Li Xin Chen)

指導教授 ： 姜庭隆

國立屏東科技大學/工學院/機械工程系所/碩士(2011年)

https://doi.org/10.6346/NPUST.2011.00127

摘要

本文研究目標在於透過新的空氣動力學修正做設計，開發並設計出水平軸風力發電機之葉片，在額定風速下提供最佳的輸出功率。傳統的葉片設計方法大多基於二維翼型的理論，而普朗特的葉尖損失校正制定較適於對葉片之翼展幾何作修正。這方法不可避免地在葉片做功率預測上不準確。在本次研究中，所選取之翼斷面為 NACA4412翼型，分別使用傳統二維葉片理論和三維空氣動力學理論對葉片做設計和分析，兩者都基於基礎理論和動量理論。最後使用計算流體動力學（CFD）的方法，對兩葉片做輸出功率的運算與分析。

關鍵字

水平軸風力發電機 ； 葉片元素理論 ； 動量理論 ； NACA4412 ； 計算流體動力學

並列摘要

The goal of this research is to develop a new aerodynamics design algorithm for the HAWT (Horizontal Axis Wind Turbine) to provide best power output at a rated wind speed. Traditional blade design method, which is based on the 2D airfoil’s blade element theory, and Prandtl’s blade tip loss correction formulation is applied to modify the span-wise geometry of the blade. This method inevitably introduced some inaccuracy in predicting the power coefficient of the blade. In this work, two blades are designed separated, a traditional one and a new designed based on a 3-dimensional aerodynamics wing theory. Both are by the blade element theory and momentum theory. Computational fluid dynamics (CFD) method is then used to calculate the performance of both blades. NACA4412 airfoil is adopted for both blades’ sectional profiles.

並列關鍵字

HAWT ； Blade element theory ； Momentum theory ； NACA4412 ； CFD

參考文獻

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