Analysis on the Performance of Vortex Generators of Wind Turbine Based on Transition Model
赵振宙1, 李涛1, 王同光2, 陈景茹1, 许波峰1, 郑源1, 魏媛1
1. 可再生能源发电技术教育部工程研究中心(河海大学),江苏省 南京市 211100
2. 江苏省风力机设计高技术研究重点实验室(南京航空航天大学),江苏省 南京市 210016
ZHAO Zhenzhou1, LI Tao1, WANG Tongguang2, CHEN Jingru1, XU Bofeng1, ZHENG Yuan1, WEI Yuan1
1.Research Center for Renewable Energy Generation Engineering, Ministry of Education(Hohai University), Nanjing 211100, Jiangsu Province, China
2. Jiangsu Key Laboratory of Hi-Tech Research for Wind Turbine Design(Nanjing University of Aeronautics & Astronautics). Nanjing 210016, Jiangsu Province, China
基金项目:
江苏省基础研究计划(自然科学基金)(SBK201340780);
国家重点基础研究发展计划项目(973项目)(2014CB046200);
江苏省六大人才高峰项目(XNY-007);
Foundation Research Project of Jiangsu Province (Natural Science Foundation)(SBK201340780);
The National Basic Research Program of China (973 Program)(2014CB046200);
Six Top Talents Program of Jiangsu Province(XNY-007);
In the inboard of blade of the huge wind turbine, the air separation often took place because of the thick aerofoil. Vortex generators (VGs) is an effective way of controlling the air separation. The DU-W2-250 aerofoil with the vortex generators was researched. The γ-Reθt transition model and the SST turbulent model were used to investigate the aerodynamics in aspect of the rules of the friction coefficient, the velocity structure and the pressure distribution of blade surface. The results obtained from the two models mentioned above were compared. The results show that the transition model results have well agreement with test results. However, the maximum error of lift coefficient and the lift-drag ratio of SST model are 21.3% and 51.8% respectively. The transition model is able to obtain the transition point of blade surface, which occurs in the downstream of VGs in small attack angle and gradually transports to the upper-stream of VGs with the attack angle growing. Under the effect of the VGs and the transition, the airflow has higher velocity near the surface of blade than that far away from the surface of blade because the airflow has high energy. The pressure coefficient of upper-surface of transition model is higher than that of SST model, which is more obvious in bigger attack angle, for example 20° attack angle.
KEY WORDS :vortex generators;transition model;wind turbine;friction coefficient;lift coefficient;pressure coefficient;lift-drag ratio;
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