風力發電機之空氣動力學設計及數值模擬驗證

Aerodynamic Design and Numerical Verification of HAWT

陳泰維(Tai-Wei Chen) ； 童琮志(Chung-Chi Tung) ； 蘇煒年(Wei-Nian Su) ； 張欽然(Chin-Jen Chang)

《航空太空及民航學刊.系列B》 41卷2期 (2009/10) Pp. 85-90

https://doi.org/10.6124/JAAA.200910_41(2).03

摘要

本文主旨在於探討中型風機的空氣動力學問題，欲藉由發展成熟的計算流體力學軟體Fluent，建立更完整之葉片氣動力係數資料庫，並檢驗風機負載程式YawDyn的結果，以解決機構設計的難題。YawDyn是目前廣泛用於水平風機負載計算的程式，在兩種不同方法得到的負載中，計算效率極佳的YawDyn不但會受到風況的影響，其前導程式AeroDyn使用的翼形升阻力係數也會造成負載的誤差。因此本篇文章以修正葉片的氣動力係數資料庫?主軸，搭配Fluent的風機模擬，評估YawDyn計算風機負載的可靠度。

關鍵字

風機 ； 升阻力係數 ； 空氣動力 ； 數值模擬

並列摘要

This paper copes with the issue of aerodynamics of medium Horizontal Axis Wind Turbine (HAWT). Using Fluent, a well-developed CFD software, a more complete database of the blade airfoil coefficients is calculated and the accuracy of YawDyn in computing the aerodynamic loading is examined. YawDyn is currently widely applied for expediting HAWT loading calculations. By comparing the results of blade loading derived from these two different methods, this study discovers YawDyn which holds the excellent calculation efficiency is very sensitive to wind conditions. Moreover, it's preprocessing tool, AeroDyn which employs the drag and lift coefficients of airfoils, if not carefully tuned, can also cause significant errors of loading calculations. Through modifying the database of the blade airfoil coefficients used in YawDyn and verifying with the simulation of the turbine characteristics by using Fluent, this paper reveals and evaluates the reliability of the YawDyn.

並列關鍵字

Horizontal Axis Wind Turbine HAWT ； Drag and lift coefficient ； Aerodynamic ； Simulation