|
|
|
| PIV visualization experiment on static flow field of Savonius wind turbine |
| LI Yan1,2, ZHAO Shouyang1, QU Chunming1, FENG Fang2,3, LI Qizhi1 |
| 1.Engineering College, Northeast Agricultural University, Harbin, Heilongjiang 150030, China; 2.Heilongjiang Provincial Key Laboratory of Technology and Equipment for the Utilization of Agricultural Renewable Resources in Cold Region, Harbin, Heilongjiang 150030, China; 3.College of Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China |
|
|
|
|
Abstract In recent years, the vertical axis wind turbines (VAWT) which take Savonius wind turbine as a typical representative have rapidly developed. In order to verify the influence of Savonius wind turbine parameters on static starting performance, the overlap ratio was taken as a study object, and three kinds of Savonius wind turbine models with different overlap ratios, namely 0, 02, 05 were selected, using PIV test system to analyze flow field around blades under the conditions of the same Reynolds number and different azimuth angles. At the same time, the numerical simulations were carried out for the corresponding models, and the torque characteristics and surrounding flow field were analyzed. The distribution of vortex and energy utilization of Savonius wind turbine with different overlap ratios were revealed by comparing the experimental with the calculated result. The results show that the rotor with a certain degree of overlap ratio can eliminate vortex flow near the blade attachment surface, which can make the flow more stable, enhance the torque coefficient and improve the static starting performance; however, too large overlap ratio will weaken the direction of the airflow in the clearance, and it is easy to cause new vortex which reduces its static starting torque, so only the appropriate overlap ratio can improve the static starting performance of Savonius wind turbine.
|
|
Received: 11 January 2018
|
|
|
|
| ［1］SAIDUR R, ISLAM M R, SOLANGI K H. A review on global wind energy policy ［J］. Renewable and sustainable energy reviews, 2010（2）: 1744-1762.［2］TJIU W, MARNOTO T, MAT S, et al. Darrieus vertical axis wind turbine for power generation II: Challenges in HAWT and the opportunity of multimegawatt Darrieus VAWT development ［J］. Renewable energy, 2015, 75: 560-571.［3］HOWELL R, QIN Ning, EDWARDS J, et al. Wind tunnel and numerical study of a small vertical axis wind turbine ［J］. Renewable energy, 2010, 35(2): 412-422.［4］李岩,郑玉芳,赵守阳,等.直线翼垂直轴风力机气动特性研究综述［J］.空气动力学学报,2017,35(3):368-382.LI Yan, ZHENG Yufang, ZHAO Shouyang, et al. A review on aerodynamic characteristics of straightbladed vertical axis wind turbine ［J］. Acta aerodynamica sinica, 2017, 35(3): 368-382. (in Chinese)［5］田文龙,宋保维,毛昭勇.椭圆叶片Savonius风力机叶轮气动性能数值计算［J］.中国电机工程学报,2014,34(32):5796-5802.TIAN Wenlong, SONG Baowei, MAO Zhaoyong. Numerical investigation of a Savonius wind turbine with elliptical blades ［J］. Proceedings of the CSEE, 2014, 34(32): 5796-5802. (in Chinese)［6］孙晓晶,曹剑楠,曹阳,等.涡与叶片间的作用对Savonius型风力机性能的影响［J］.工程热物理学报,2014,35(3):472-475.SUN Xiaojing,CAO Jiannan,CAO Yang, et al. Influence of interaction between vortices and blade on the performance of Savonius wind turbine ［J］. Journal of engineering thermophysics, 2014, 35(3): 472-475. (in Chinese)［7］SINGH M A, BISWAS A, MISRA R D. Investigation of selfstarting and high rotor solidity on the performance of a three S1210 blade Htype Darrieus rotor ［J］. Renewable energy, 2015,76: 381-387.［8］高志鹰,汪建文,韩晓亮,等.风力机叶片动态绕流结构的PIV实验研究［J］.工程热物理学报,2009,30(2):230-232.GAO Zhiying, WANG Jianwen, HAN Xiaoliang, et al. PIV experiment on dynamic flow around a blade of the wind turbine ［J］. Journal of engineering thermophysics, 2009, 30(2): 230-232. (in Chinese)［9］肖京平,武杰,陈立,等.风力机叶尖涡尾迹结构PIV测量研究［J］.应用数学和力学,2011,32(6):683-692.XIAO Jingping, WU Jie, CHEN Li, et al. PIV measurements of tip vortex wake structure of a wind turbine ［J］. Applied mathematics and mechanics, 2011, 32(6): 683-692. (in Chinese)［10］郭锐,徐惊雷,赵辉,等.风力机二维翼型的PIV实验研究与数值仿真［J］.太阳能学报,2010,31(8):1055-1059.GUO Rui, XU Jinglei, ZHAO Hui, et al. PIV experimental study and numerical simulation of a 2D airfoil of wind turbine ［J］. Acta energiae solaric sinica, 2010, 31(8): 1055-1059. (in Chinese)［11］金雪红,梁武科, 李常.风速对垂直轴风力机风轮气动性能的影响［J］.流体机械，2010，38（4）：45-49.JIN Xuehong, LIANG Wuke, LI Chang. Aerodynamic performance of the vertical axis wind turbineon wind speed［J］. Fliuid machinery, 2010，38（4）：45-49.(in Chinese)［12］张健宇，李学敏，陈帆,等.H 型垂直轴风力机翼型的数值模拟及优化［J］.2012 ，40 （10）：33-40.ZHANG Jianyu，LI Xuemin，CHEN Fan，et al.Numerical simulation and optimization of the airfoil of H － type vertical axis wind turbine［J］. Fliuid machinery, 2012 ，40 （10）：33-40. (in Chinese)［13］廖书学，李春，聂佳斌，等.不同翼型对垂直轴风力机性能的影响［J］.机械设计与研究，2011， 27 ，（3）：108-112.LIAO Shuxue，LI Chun，NIE Jiabin，et al.The analysis of aerodynamic performance for small H type VAWT based on different airfoils［J］. Machine Design and Research, 2011， 27 ，（3）：108-112. (in Chinese)［14］祖红亚，李春，叶舟，等.垂直轴风力机动态流场及其气动性能分析能源研究与信息［J］. ２０１４，３０（４）：199-203. ＺＵ Ｈｏｎｇｙａ，ＬＩ Ｃｈｕｎ，ＹＥ Ｚｈｏｕ，et al.Ａｅｒｏｄｙｎａｍｉｃ ｐｅｒｆｏｒｍａｎｃｅ ａｎａｌｙｓｉｓ ａｎｄ ｄｙｎａｍｉｃ ｆｌｏｗ ｆｉｅｌｄ ｏｆ ｖｅｒｔｉｃａｌ ａｘｉｓ ｗｉｎｄ ｔｕｒｂｉｎｅ［J］.Ｅｎｅｒｇｙ Ｒｅｓｅａｒｃｈ ａｎｄ Ｉｎｆｏｒｍａｔｉｏｎ，２０１４，３０（４）：199-203. (in Chinese) |
|
|
|
