3-D Numerical Simulation of Aerodynamic Performance of Wind Turbine Blades in Icing Condition
Wide cold region with high air density as well as wind speed is beneficial for the wind energy exploitation in general.However,wind turbines in these regions have always been suffering from the production loss after blade icing.In the paper,3-D numerical simulation of clean and iced blades in the computational fluid dynamics(CFD)method are put forward to evaluate the aerodynamic performance of blades after icing.Results show that CFD computational results are in accordance with the experimental results for clean and rime-iced blades within rated wind speed,while overrated for glaze-iced blades at high wind speed.For clean and iced wind turbines,there is a nearly linear increasing relationship between rotor speed and wind speed below rated wind speed.As wind speed increases,output power of wind turbines working in icing conditions decrease more dramatically.Besides,ice shapes reduce normal force and tangential force significantly at approximate 62%~89%radial position.Influenced by ice shapes,blades are more likely to work in stall region at same wind speed.Furthermore,flow separation around iced blades is more serious with more extensive vortex structure and advanced separation point,which will produce more momentum and frictional loss,especially for glaze ice shapes.The results provide a valuable reference for both wind farms operation and generator system evaluation in cold regions.
wind turbine aerodynamic performance 3-D CFD numerical simulation blade icing power loss
SHU Lichun LI Hantao HU Qin JIANG Xingliang QIU Gang
State Key Laboratory of Power Transmission Equipment & System Security and New Technology College of Electrical Engineering,Chongqing University,Chongqing 400044,China
国际会议
重庆
英文
1-6
2017-09-25（万方平台首次上网日期，不代表论文的发表时间）