葉片扭轉角對水平軸風力機系統性能之研究

Research on the influence of blade twist angle on the performance of horizontal-axis wind turbine system

黃暉仁(Hui-Ren Huang)

指導教授 ： 翁輝竹

中原大學/工學院/機械工程研究所/碩士(2013年)

https://doi.org/10.6840/cycu201301033

摘要

本論文完成水平軸風力機系統性能之研究，目的在探討不同的風速及葉片數下，葉片扭轉角對其機械能源、電力能源及轉換效率之影響。首先，以工業塑膠作為葉片材料，設計不同扭轉角度之葉片，接著藉由風洞測試系統之設置，以產生不同風力條件。藉由風力機系統之架設與轉速、扭矩及發電功率之量測，以決定不同風速及葉片數下，水平軸風力機系統性能之數據。最後，使用STAR CCM+模擬分析軟體分析葉片表面壓力及速度場以了解動態現象之成因。
研究結果發現，在某一特定風速或葉片數下，機械能源、電力能源及轉換效率皆隨著葉片扭轉角增加而增加，然而至一極大值後便下降。此臨界扭轉角可隨風速及葉片數增加而呈現減小的現象。

關鍵字

能源轉換 ； 風力能源 ； 水平軸風力機 ； 扭轉角

並列摘要

This paper conducts a study on the performance of horizontal-axis wind turbine system. The purpose is to investigate the influence of blade twist angle on its mechanical energy, electrical energy, and conversion efficiency for different wind speeds and blade numbers. First, we present blades of different twist angles by using industrial plastics and generate different wind conditions by setting a wind tunnel testing system. Then, we measure the rotational speed, torque, and power generation, so as to obtain the horizontal-axis wind turbine system performance data at different wind speeds and blade numbers. Finally, we use STAR CCM+ for simulation analyze the blade surface pressure and velocity fields, so as to realize the cause of dynamic phenomena.
It is found that when the value of the blade twist angle increases at a fixed wind speed and blade number, all the mechanical energy, electrical energy, and conversion efficiency increase to their maxima and then decrease. This critical twist angle can be magnified by increasing the wind speed and blade number.

並列關鍵字

wind energy ； twist angle ； energy conversion ； horizontal-axis wind turbines

參考文獻

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