STUDY THE NONSTATIONARY DYNAMIC CHARACTERISTICS OF A ROTATING WIND TURBINE DARRIEUS

Abstract

Wind - an environmental friendly source of energy! In all developed countries of the world the wind, as an energy source, begins to play a significant role in their energy balance. Production and design of efficient wind turbines is expanding continuously. The territory of the Republic of Kazakhstan has a huge wind energy potential, it suggests a great future for the use of wind machines in our country. Cost-effectiveness of modern wind turbines is determined by the utilization of wind energy by swept unit area in air flow. Therefore, their design refers to the category of the most high-tech industry. A mathematical model of vertical axis wind turbine Darrieus non-stationary operation, which rotates by the lift action on the airfoil blades, is viewed in the paper. The mathematical formulation of the problem and the Darrieus wind turbine angular velocity calculation method during oncoming flow are developed. The results of numerical calculation are obtained. Reliable results were obtained according to the calculations by the developed technique, which well describe the physics of the phenomenon. The developed mathematical model, its numerical implementation and the obtained results may be useful for the further improvement of the problem’s mathematical description and vertical-axis wind turbines design.

Keywords: Darrieus vertical-axis wind turbine, steady flow, the lift force, air resistance force