• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2018, Vol. 54 ›› Issue (6): 168-174.doi: 10.3901/JME.2018.06.168

• 可再生能源与工程热物理 • 上一篇    下一篇

基于双盘面多流管模型立轴风轮变桨方法研究

赵振宙1, 严畅1, 王同光2, 许波峰1, 曾冠毓1   

  1. 1. 河海大学能源与电气学院 南京 211100;
    2. 南京航空航天大学江苏省风力机设计高技术研究重点实验室 南京 210016
  • 收稿日期:2017-01-06 修回日期:2017-08-21 出版日期:2018-03-20 发布日期:2018-03-20
  • 作者简介:赵振宙,男,1982年出生,博士,副教授。主要研究方向为风力机空气动力场控制。E-mail:joephy@163.com
  • 基金资助:
    国家自然科学基金(11502070)、江苏省基础研究计划(自然科学基金)(SBK201340780)和国家重点基础研究发展计划(973计划,2014CB046200)资助项目。

Study on Variable Pitch Strategy of VAWT Based on Double Multiple Stream Tubes Model

ZHAO Zhenzhou1, YAN Chang1, WANG Tongguang2, XU Bofeng1, ZENG Guanyu1   

  1. 1. College of Energy and Electrical Engineering, Hohai University, Nanjing 211100;
    2. Jiangsu Key Laboratory of Hi-Tech Research for Wind Turbine Design, Nanjing University of Aeronautics & Astronautics, Nanjing 210016
  • Received:2017-01-06 Revised:2017-08-21 Online:2018-03-20 Published:2018-03-20

摘要: 叶片旋转一周,攻角随方位角近似呈正弦曲线变化,力矩随之上下波动。传统变桨重在改善最大攻角对应方位角的叶片性能,且改善程度随攻角减小而减弱。提出在小攻角区域采用大桨角,在大攻角区域采用小桨角,重点改善小攻角区域性能的变桨思路。以采用NACA0012,高2 m和旋转直径2 m的两叶片H型风轮为研究对象,基于双盘面多流管模型,分析变桨方案下尖速比分别为4.5和5时,攻角、切向力系数、转矩和风能利用系数的变化规律。研究结果表明新变桨方案下小攻角区域的攻角、切向力系数、转矩,较定桨方案均有明显提高;增大了高性能区域范围,缩小低性能区域;风能利用系数在尖速比5时提高了18.9%。计算结果与试验结果及文献计算结果均吻合良好,证明了计算结果具有一定的精度。

关键词: H型立轴风轮, 变桨方案, 气动性能, 双盘面多流管模型

Abstract: When the blade of vertical axis wind turbine (VAWT) rotates along a circle, the angle of attack (AOA) versus azimuth follows the curve of sine function approximately. The oscillating AOA results in the waved torque. The traditional variable pitch technologies mainly focus on the performance promotion at the position with higher AOA. The smaller AOA the azimuth has, the smaller pitch angle is designed, and the smaller enhancement is obtained. A new variable pitch strategy is proposed:the smaller pitch angle is employed in the azimuth with higher AOA, while the bigger pitch angle is employed in the azimuth with lower AOA, and the new technology mainly focuses on improvement of aerodynamic performance of azimuth position with small angle of attack. A two-bladed H-type VAWT, employing NACA0012 airfoil and with height 2 m and rotation diameter 2 m, is chosen as research objective. Based on double multiple stream-tubes model, the variation rules of angle of attack, tangential force coefficient, torque and power coefficient are analyzed at the condition of tip speed ratios are 4.5 and 5. The results show that:the new pitch strategy effectively improves AOA, tangential force coefficient, torque and rotor power coefficient. The maximum power coefficient is increased by 18.9% at the tip speed ratio of 5. The zones of higher performance are amplified and the zones owned lower performance get narrowed. The computation results have good agreement with experiment results and the ones of reference, which proves that the results of the paper own high accuracy and credibility.

Key words: aerodynamic performance, double multiple stream tubes mode, H-type VAWT, pitch strategy

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