Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 50 4 2018 10 23 Fabrication and Test of an Axial Wind Turbine with the Most Power During Absorbing Flow Kinetic Energy Fabrication and Test of an Axial Wind Turbine with the Most Power During Absorbing Flow Kinetic Energy 913 923 1004 10.22060/mej.2017.12269.5299 FA M. Rad Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran Ali Zahedi Nejad Department of Mechanical and Aerospace Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran Journal Article 2016 12 25 The aim of the present paper is fabrication and testing an axial wind turbine with power-coefficient greater than 55 percent. Since this power-coefficient is the highest value among the most recent fabricated axial turbines. The present study has led to manufacturing new design of a small wind turbine that has shown power-coefficient of 68 to 80 percent in experimental measurements. Measuring power-coefficient of two-propeller rotor of the wind turbine is in accordance with double-actuator-disc theory, which has proved achievement to power-coefficient of 64 percent. The rotor of the wind turbine consists of an axial three-blade propeller and an optimized six-blade combined-propeller. The parts of the wind turbine have been manufactured with three-dimensional print technology. A large axial fan has been installed horizontally to produce wind flow. A miniature mechanical brake has been installed on the rotor’s axis and it is adjustable for generating constant braking torque. The rotor’s drag force has been measured with the S-type load-cell that was accommodated in an aerodynamic structure. The small wind turbine has preserved its optimum power-coefficient in the low speed wind flow (in the range 1 to 3 m/sec). Experiment has been accomplished for the rotor of turbine and for the wind turbine having walls and supporting arms and nearly the same results has been achieved. The aim of the present paper is fabrication and testing an axial wind turbine with power-coefficient greater than 55 percent. Since this power-coefficient is the highest value among the most recent fabricated axial turbines. The present study has led to manufacturing new design of a small wind turbine that has shown power-coefficient of 68 to 80 percent in experimental measurements. Measuring power-coefficient of two-propeller rotor of the wind turbine is in accordance with double-actuator-disc theory, which has proved achievement to power-coefficient of 64 percent. The rotor of the wind turbine consists of an axial three-blade propeller and an optimized six-blade combined-propeller. The parts of the wind turbine have been manufactured with three-dimensional print technology. A large axial fan has been installed horizontally to produce wind flow. A miniature mechanical brake has been installed on the rotor’s axis and it is adjustable for generating constant braking torque. The rotor’s drag force has been measured with the S-type load-cell that was accommodated in an aerodynamic structure. The small wind turbine has preserved its optimum power-coefficient in the low speed wind flow (in the range 1 to 3 m/sec). Experiment has been accomplished for the rotor of turbine and for the wind turbine having walls and supporting arms and nearly the same results has been achieved. https://mej.aut.ac.ir/article_1004_fed33392d3a48aa149a87a38b875ba4a.pdf