چكيده به لاتين
Nowadays, one of the methods of energy generation independent of the network is the use of wind energy systems. Wind energy compared to fossil fuels has excellence such as renewable, non-polluting emissions, energy dissipation due to long-term transmissions, the absence of excessive costs for long-term transportation and the lack of groundwater use. Be Wind energy systems are used on both urban and industrial scale. The turbine of the wind energy system is divided into three groups of vertical axis, horizontal axis and spiral axis. The vertical axis turbines are more suitable because of advantages such as lack of dependence on wind direction, cost of making and designing cheap, dimensions and weight suitable for urban consumption, and one of the most suitable types of wind turbine is the vertical axis of Daunius, which is necessary to be suitable. That turbine function is at low wind speed. The aim of this project was to study the parameters of turbine design for maximum power, including torque, torque, power and power factor at low wind speed, as a result of changes in the spacing of the blades from the turbine center and the angle variations of the blades. The geometry of the blade design has a semi-circular floor and ceiling, and is used to build a 3D printer device to increase the precision of construction, and has a very light weight. The height of the blade is H=20(cm), the length of the blade L=14(cm) and the width of the blade W=7(cm), and the turbine is in diameter D=28(cm), D=54(cm), D=80(cm) and at the angle of attack β=0◦ =, β=+30◦, β=-30◦, β=+60◦ and β=-60◦ Experimentally tested and quantified in Ansys Fluent 15.0 software using the turbulence method k-ε standard field The flow around the turbine has been solved, which is in good agreement with experimental results. The turbine dynamic torque at constant speeds and in the speed ratio of the tip of the blade TSR = 0.7-0.1and the static torque of the turbine at five turbine angles Θ=0◦, Θ=30◦, Θ=60◦, Θ=90◦, Θ=120 in a wind tunnel with a uniform flow in five wind speeds measured. After the experiments, it has been observed that increasing the spacing of the blade from the turbine center has increased the dynamic, static and turbine output torque, and reduced the torque and power of the blade to the shaft. Dynamic torque at the positive and negative angles of 60◦ is greater than the angle of attack 0◦ and the dynamic torque in the angle of attack is positive and negative 30◦ is less than the angle of attack ◦0. The maximum power is related to the angle of attack of -60 ◦, then +60◦ and then 0◦. The maximum power was very low with respect to the angle of attack 0◦, then -30◦ and then +30◦.
