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___________________________________________________ UDC 621.548; 621.311.24 Technical mechanics, 2017, 2, 61 - 72 EXPERIMENTAL INVESTIGATIONS OF MULTIBLADE WIND WHEEL MODEL DOI: https://doi.org/10.15407/itm2017.02.061 I. A. Shedlovsky
I. A. Shedlovsky
The majority of the existing techniques for studying the characteristics of physical models of wind generators
are oriented on the use of the specialized equipment and a wind tunnel. In some cases, these investigations
are too expensive or unattainable. Transportation of the wind wheel model with the required velocity is alternative
to such studies. The study objective is to determine the mechanical characteristics of a physical model of a horizontal-axial
wind wheel based on the results of measurements during transportation of the model with the required
velocity. The mechanical characteristics to evaluate the wind wheel effectiveness, the most efficient operational
conditions related to the wind velocity, requirements for the electrical generator parameters have been resulted
from studies.
The wind velocity as a component of the incoming airflow near the blades in a relative motion is considered
as a factor resulted in the rotation, and a radial velocity of an elemental blade portion is a consequence of the
effects of the wind velocity and is able to counter the rotation. Torques about the wind wheel axis due to those
components are found. The resulting torque in the wind wheel axis is determined as the sum of torques of the
incoming airflow components in a relative motion.
Practically, while transporting the wind wheel under wind calm conditions, we measure the velocity of the
incoming airflow, the force produced by the airflow in axis of the wind wheel, a maximal rotational speed of an
unloaded wind wheel. From measurements, we derive the real mechanical characteristics of the wind wheel under
consideration
wind power plant, multiblade wind wheel, aerodynamics, mechanical characteristics, experimental investigations, physical model.
1. Obukhov S. G. Method of simulation of mechanical characteristics of low-powered wind turbines. Vetroenergetika. 2011. No 1. Tomsk: TPU Publishing House, 2011. 142 pp. (in Russian).
DOI: https://doi.org/10.15407/itm2017.02.061 Copyright (©) 2017 I. A. Shedlovsky Copyright © 2014-2018 Technical mechanics ____________________________________________________________________________________________________________________________ |
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