The research of drag of two-bladed wind turbine in the operating mode

Abstract

The paper presents the results of experimental studies to determine the drag forces and drag coefficient of two-bladed wind turbine based on the Magnus effect with smooth rotating cylinders in the range of velocities of airflow 4 ÷ 13 m / s. Dependences of drag forces on the flow rate of two-bladed wind turbine with rotating smooth cylinder at the diameter of cylinders is 5 cm,10 cm and the length of each cylinder is 20 cm were obtained. Universal dependences of drag coefficient of two-bladed wind turbine on the Reynolds number at the diameter of cylinders is 5 cm, 10 cm and the length of each cylinder is 20 cm were investigated. The results showed that an increase in Reynolds’ number leads to a decrease in drag coefficient since drag coefficient is directly proportional to the drag force but is inversely proportional to the square value of speed.