Khaminich О., Zinchenko A., Baiul K. Maximizing the efficiency of low-speed horizontal axis wind turbines designed for use in coal mining industry
- Details
- Parent Category: Geo-Technical Mechanics, 2025
- Category: Geo-Technical Mechanics, 2025, Issue 173
Geotech. meh. 2025, 173, 145-157
MAXIMIZING THE EFFICIENCY OF LOW-SPEED HORIZONTAL AXIS WIND TURBINES DESIGNED FOR USE in COAL MINING INDUSTRY
1Oles Honchar Dnipro National University
2Institute of Transport Systems and Technologies of National Academy of Sciences of Ukraine
3Z.I. Nekrasov Iron and Steel Institute of National Academy of Sciences of Ukraine
4Dnipro Metallurgical Institute, Ukrainian State University of Science and Technologies
UDC [620.9:622.012.2:371.61].001.24:622.012
Language: English
Abstract. The prospects for using a low-speed wind turbine with a horizontal axis of rotation to improve the efficiency of coal industry enterprises during their diversification are investigated. The necessity of addressing the optimal design of wind turbines with a horizontal axis of rotation for such conditions is emphasized, as this can ensure their use both during the operation of enterprises and after their diversification. The relationship equation from the theory of Sabinin-Yuriev has been adapted to the conditions of rotors of low-speed wind turbines, allowing for its analytical solution to be obtained. As a result, an analytical formula for calculating the value of the skew angle has been derived for the first time. This angle is formed between the directions of the vectors of the total velocity of the undisturbed and disturbed flows, depending on the aerodynamic qualities of the profile and the speed of the rotor blade section. This has led to the formulation of equations to analytically determine the components of the integrand function for calculating the wind energy utilization coefficient by the rotor. An analytical dependence of the coefficient of wind energy utilization, which is created by the blade cross-section under the action of the wind, from the aerodynamic qualities of the profile and the speed of the rotor blade cross-section, which does not require solving the connection equation and allows searching for its extrema and direct integration along the rotor blade. For the intervals of change in values characterizing the dependence of the wind energy utilization coefficient of the blade cross-section on the aerodynamic qualities of the profile and the speed of the rotor blade cross-section, calculations were performed that prove the existence of a single maximum in this function, which is located closer to the outer edge of the blade. The value of this maximum changes with a change in the blade cross-section profile, i.e., it depends on the aerodynamic properties of the profile used. Thus, the developed calculation methods allow determining the geometric characteristics of the rotor blade cross-sections of a low-speed wind turbine with a horizontal axis of rotation, namely the angle of twist of the cross-section and the chord length of the blade in the cross-section, as well as the radius of the rotor, which ensure the maximum coefficient of wind energy utilization, depending on the wind speed, rotor rotation frequency, and type of aerodynamic profile of the blade cross-section. Such a methodological approach to calculating rotor parameters allows for the optimal design of horizontal axis wind turbines for coal industry enterprises during their diversification and during the direct operation of enterprises.
Keywords: wind power plant with a horizontal axis of rotation, wind energy utilization coefficient, Sabinin-Yuriev model, rotor speed
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About the authors:
Khamіnіch Оleksandr, Candidate of Technical Sciences (Ph.D.), Associate Professor, Oles Honchar Dnipro National University (DNU) under the Ministry of Education and Science of Ukraine, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. (Corresponding author)
Zinchenko Andrii, Candidate of Physical and Mathematical Sciences, Senior Researcher, Department of Dynamics and Strength of New Types of Transport, Institute of Transport Systems and Technologies of National Academy of Sciences of Ukraine, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.
Baiul Konstantin, Doctor of Technical Sciences, Senior Researcher, Department of Technological Equipment and Control Systems, Z.I. Nekrasov Iron and Steel Institute of National Academy of Sciences of Ukraine, Dnipro, Ukraine; Department of Industrial Engineering, Dnipro Metallurgical Institute, Ukrainian State University of Science and Technologies, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.
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