NACA4系列翼型應用於小型垂直軸式風力發電機之實驗研究

The Experimental Study of NACA 4 Digital Airfoils Applied to Straight-bladed VAWTs

苗志銘(Jr-Ming Miao) ； 謝文吉(Wen-Chi Hsieh) ； 賴正權(Cheng-Chyuan Lai) ； 戴昌聖(Chang-Sheng Tai)

《航空太空及民航學刊.系列B》 44卷1期 (2012/04) Pp. 31-41

https://doi.org/10.6124/JAAA.201204_44(1).04

摘要

本論文主要利用風洞實驗探討垂直軸式風力機在較低風速環境下所適用之葉片構型分析，實驗過程中藉由300瓦發電機配合數據擷取系統，進一步量測風力機葉片構型的輸出功率及轉速，進行葉片翼構型對風機性能的影響探討。本實驗採直葉式（H-rotor）垂直軸式風力機構型，針對具高升/阻比NACA0022、NACA6422、NACA6412、NACA4412及NACA6422等五種葉片構型，設置在開放式風洞進行實驗量測，藉此探討NACA4系列葉片翼型在不同厚度、彎度及裝置角度條件下對風機性能之影響。實驗結果顯示，NACA6422在風速13.5m/s以下時整體輸出功率優於對稱翼剖面NACA0022翼型，且啟動風速降低約33％。故非對稱厚翼較對稱厚翼及非對稱薄翼更適合運用在低風速垂直軸式風力機。本研究結果可提供垂直軸式風力機葉片設計選用之參考。

關鍵字

垂直軸式風力機 ； 直葉式 ； NACA4系列翼型 ； 風洞實驗

並列摘要

The experimental study of aerodynamic characteristics of vertical axis wind turbine (VAWT) blades has been conducted in CCIT suction-type low speed wind tunnel. Power and rotation speed were measured by using data acquisition system to analyze the effects of blade-section shape on the performance of wind turbine. The test model of experiments in the research was H-rotor VAWT. Five shapes of blade-section, NACA0022, NACA6422, NACA6412, NACA4412 and NACA6404 were taken in this research. Effects of thickness and camber of blade-section, and blade setting angles on the performance of VAWT have been analyzed in detail. The results show that NACA6422 blade-section has self-starting speed of 33% lower than NACA0022 under the wind speed of 13.5m/s. Therefore, blades with anti-symmetric and thick blade-section are generally more suitable for applying to VAWT. All results of this study can be used in the optimization design of VAWT blade.

並列關鍵字

VAWT ； H-rotor ； NACA 4 digital airfoil ； Wind-tunnel experiment