Numerical Investigation of Aerodynamic Characteristics of a New Wind Turbine During Its Design Stage
龔棉英、吳佩學
E-mail: [email protected]
ABSTRACT
ABSTRACT Present work conducts computer simulations with the Computational Fluid Dynamic (CFD) software package Fluent as a modeling tool to explore aerodynamic characteristics of a new Wind Turbine named M1. In this research, the governing equations consisting of two-dimensional, steady and three-dimensional, time-dependent conservation of mass and momentum are solved. Both laminar and turbulent flow fields are solved. For the turbulent flow computation, the k-ε two-equation turbulent model is adopted. The three-dimensional, tapered and twisted M1 wind turbine blade used in this study employs a hybrid HH-10/HH-12 non-symmetrical airfoil in the design. The important aerodynamic properties, including pressure, torque, and aerodynamic power, are determined under broad ranges of wind speed and pitch angle. The results of the predictions can provide the designers with references for stress analyses as well as the input loading conditions for further areoelastic analysis.
Keywords : Computational Fluid Dynamic, aerodynamic, wind turbine, torque, aerodynamic power, pitch angle Table of Contents
目錄 封面內頁 簽名頁 授權書 iii 中文摘要 iv 英文摘要 v 誌謝 vi 目錄 vii 圖目錄 ix 表目錄 xi 符號說明 xii 第一章 前言 1.1研 究背景與動機 1 1.2風車輸出與風速之關係 2 1.3研究目的 3 第二章 文獻回顧 2.1二維模擬分析文獻回顧 5 2.2三維模擬分析 文獻回顧 9 第三章 研究方法與進行步驟 3.1 NACA0012翼切面之二維流場模擬 13 3.1.1 NACA0012翼切面幾何外型 13 3.1.2 NACA0012翼切面模擬條件 13 3.1.3 NACA0012翼切面二維模擬網格 14 3.1.4 二維流場數值計算方法與收斂條件 14 3.2新型 小型風車M1翼切面之三維流場動態模擬 16 3.2.1 新型小型風車M1翼切面幾何外型 16 3.2.2 新型小型風車M1模擬條件 16 3.2.3 新型小型風車M1三維滑動網格 16 3.2.4 三維流場數值計算方法與收斂條件 17 第四章 結果與討論 4.1 NACA0012翼切 面之結果與討論 19 4.2新型小型風車M1翼切面之結果與討論 21 4.2.1 格點相依結果 21 4.2.2 固定風速、轉速，不同偏斜角 下層流與紊流比較 21 4.2.3 12m/s、偏斜角等於0°、5°、10°下不同轉速結果討論 23 4.2.4 啟動模式結果討論 23 第五章 結論 參考文獻 51
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