HAWT-VAWT interaction study based on actuation line modeling
A large eddy simulation(LES)combined with an actuator line model(ALM)was used to study the effect of adding a vertical axis wind turbine(VAWT)to the gap of a horizontal axis wind farm unit on the wind farm.The interaction between a group of horizontal axis wind turbine(HAWT)and VAWT under atmospheric boundary layer(ABL)conditions was simulated to analyze the power output characteristics and wake characteristics of the wind turbine.The results of the study show that adding VAWT to a horizontal axis wind farm can enhance the power generation of the wind farm and make full use of the unit gap.The wind turbine power output characteristics and wake characteristics mainly depend on the relative positions of the two,when the VAWT is located in front of the HAWT,it can increase the power output of the HAWT by 0.44%,and vice versa when it is located at the rear,the power output of the VAWT will be increased significantly by about 13.21%.Compared to a single HAWT,the total power can be increased by 2.54%with the addition of VAWT.In addition,the VAWT wake stream is significantly deflected as it passes through the HAWT near wake region.In the far wake region,the two wake streams mix with each other and show a faster recovery rate.
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