Study the Effect of Blade Angles on the Performance of Axial Six Blades Wind Turbine

Abstract

In this paper, the performance of a six blades axial type wind turbine has been studied experimentally to estimate the wind power, the electrical generated power and-the modified power-coefficient of the wind-turbine. This study was conducted under different operating conditions assuming steady-state, incompressible and isothermal air flow through the wind-turbine. The range of operating condition was (2 to 5.6 m/s wind speed), (10% to 100% of electrical load that is applied on the terminals of the electrical generator) and (10° to 80° blades angle of the wind-turbine). A good agreement was obtained when comparing the results of the present work with those of a previously published article. The predicted results showed that increasing the wind speed and-the blades angle of the wind-turbine will increase the generated power from the wind-turbine. The maximum-value of the modified power-coefficient was (0.57) at a wind velocity value of (5.6 m/s) and at a blades angle value of (80°). It is found that it's not recommended to operate the wind-turbine at (80°) blades angle associated with a wind speed range that is above (3.8 m/s) due to a high level of wind-turbine vibration.

The effect of pitch angle variation on performance of hybrid Darrieus-Savonius dual shaft vertical wind turbine

“…Horizontal turbine with pitch angle at 15-degree angle shows the best performance (4). In Axial Six Blades Wind Turbine with wind speeds ranging from 2 to 5.6 m/s, the best pitch is at an angle of 80 degrees (5). Investigation of the turbine Savonius on pitch angles and the number of blades also affects the power produced, the number of blades 16 with an angle of 5 degrees is best to increase 4.5% from the reference conditions at wind velocity of 2.32 m/s (6).…”