Ducted wind turbines are extremely useful in areas with low wind speeds. The presence of the duct enhances the wind velocity where the turbine blades are fixed. The performance of the ducted turbine mainly depends on the average velocity at the blade plane. The objective of this article is to optimize the duct to enhance the performance of the wind turbine and reduce the net load acting on it. Numerical simulations were performed on four ducts of different configurations (a) plate, (b) plate with the flange at the exit, (c) aerofoil, and (d) aerofoil with the cowl of same aspect ratio using ANSYS Fluent. The performances were evaluated, and it was found that the aerofoil duct with cowl showed improved performance with less net load acting on it and had a high drag coefficient. The geometrical parameters of duct and cowl were optimized using the design of experiments (DOE) approach to improve the speed-up ratio and reduce the drag coefficient. Simulation responses such as speed-up ratio, pressure coefficient, isovolume of pressure, and drag coefficients were taken into consideration. The results indicate that the increase in isovolume of pressure \(\ge \) 0.5 Pa over the enclosure’s pressure side enhances the average throat velocity. The investigations show that the duct L/D ratio was significant in improving the speed-up ratio and volume of pressure, whereas the cowl angle showed dominance in increasing the drag coefficient. The optimum combination of duct and cowl with high speed-up ratio, less net load was concluded.

风管风机在低风速地区非常有用。管道的存在提高了固定涡轮叶片的风速。管式涡轮机的性能主要取决于叶片平面的平均速度。本文的目的是优化风道，以增强风力涡轮机的性能并减少作用在其上的净负荷。使用ANSYS Fluent在具有不同配置的四个管道上进行了数值模拟（a）板，（b）出口处具有凸缘的板，（c）机翼，和（d）具有相同长宽比的前围的机翼。对性能进行了评估，发现带有前罩的翼型风道表现出改进的性能，作用在其上的净载荷更少，并且阻力系数较高。通过实验设计（DOE）方法优化了风道和前围的几何参数，以提高加速比并降低阻力系数。模拟响应如加速比，压力系数，等压压力和阻力系数已被考虑在内。结果表明等压线的增加\（\ ge \） 机箱压力侧的0.5 Pa可提高平均喉咙速度。研究表明，导管的L / D比在提高加速比和压力体积方面具有显着意义，而前围角则在增加阻力系数方面占主导地位。得出了加速比高，净负载少的风道与前围的最佳组合。