A cross-flow wind turbine has a high torque coefficient at a low tip speed ratio; therefore, it is a good candidate for a self-starting turbine. This study aims to investigate the best configuration between guide vanes and cross-flow vertical axis wind turbine. The experiment test was carried out to determine the turbine with the highest power coefficient. The cross-flow turbine has 14, 18, and 22 blades with using 6,10 and 14 blades of guide vane (GV) was developed in this study, employing 15°, 25°, 35°, 45°, 55°, 65°, and 75° of tilt angles in fifth different wind speed conditions 4 m/s, 6 m/s, 7.5 m/s, 9.20 m/s, and 11 m/s. The turbine has 22 blades with 14 GV blades at 55° of tilt angle blades producing more remarkable turbine performance improvement than other blades. The highest power coefficient (CP) of cross-flow using 14 GV blades at 55° was 0.0162 at 0.289 TSR, which increased around 59% of the turbine's performance using GV.

Study the influence of using guide vanes blades on the performance of cross-flow wind turbine

Wind turbine designs for urban applications: A case study of shrouded diffuser casing for turbines

The impact of inertial forces on morphing wind turbine blade in vertical axis configuration

Influence of tilt angle and the number of guide vane blades towards the Savonius rotor performance

Level of utilization of clean energy has grown dramatically in recent years due to increased pollution and environmental issues. For instance, the extra potential energy in water supply system is usually wasted, due to its low capacity. Design of a proper turbine has recently been given more attention by researchers to apply this clean energy. In the present paper, a modified Savonius turbine, suitable for use in a 4-inch pipe, is designed. Turbine with two blades is tested in a laboratory rig and also simulated with the FLUENT software. By matching numerical and laboratory results, simulations are expanded and the blades number effect on turbine performance is studied under determined hydraulic conditions. The flow field around the modified Savonius turbine is interpreted by the 3D streamlines and pressure contours. The obtained results indicate that increasing the turbine blade numbers up to 5 and more causes the turbine efficiency first to rise and then to fall, respectively.

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Investigation of Blade Number Effect on Hydraulic Performance of In-Pipe Hydro Savonius Turbine

A novel omni-direction-guide-vane (ODGV) that surrounds a vertical axis wind turbine (VAWT) is designed to improve the wind turbine performance. A scaled model was constructed to simulate a Savonius VAWT enclosed by the ODGV on top of high-rise building for wind tunnel testing. Torque, rotational speed and power output were measured using a torque transducer with hysteresis brake applied to the rotor shaft. With the aid of the ODGV, the highest increment in rotational speed (11.4%) was achieved at a wind speed of 3 m/s (at free-running condition). The ODGV also increased the power coefficient, Cp of the VAWT at all tested wind speeds and the maximum (Cp = 0.26) was achieved at the tip speed ratio, TSR = 0.95 for a wind speed of 3 m/s. The highest increment of Cp (56.9%) was obtained at the same TSR and wind speed. With this design, the size of VAWT can be reduced for a given power output.

Ahmad Fazlizan Abdullah

Papers

Design and wind tunnel testing of a Savonius wind turbine integrated with the omni-direction-guide-vane

Building integrated wind energy conversion systems for future cities