RESULTS OF THE EXPERIMENTAL STUDY OF THE FLOW FIELD OF A STATIONARY AIR FLOW DURING THE OPERATION OF A FOUR-BLADE BIDARRIEUS-1 TURBINE
DOI:
https://doi.org/10.31489/2022No3/60-68Keywords:
wind turbine, Darrieus, Bidarrieus, two-rotor wind power turbine, wind power factorAbstract
There are a great variety of wind turbine constructions but by their principle of operation they are divided
into three main types - sail (Savonius wind power unit), propeller and airfoils (Darrieus wind turbine). At present,
propeller-type wind-turbines are the most widely spread. They are produced on a commercial level in many
countries. Other conditions being equal, the power produced by wind power unit (WPU) is proportional to the
area being swept around by a wind wheel. Therefore, Megawatt propeller-type wind turbines have blades with the
length of 40 and more meters. Only aircraft works with a highly-qualified personnel and corresponding
equipment can produce such long blades of a specific shape. Of high interest have become airfoil wind turbines
(Darrieus WPU) lately. They are of a simpler construction and have a quite high wind power utilization factor
(ξ=0.45). In spite of the fact that this is a good index of WPU efficiency, the workers of al-Farabi Kazakh
National University have developed a new version of a wind turbine which allows increasing 1.3-1.6 times the
value of this coefficient. This apparatus is named a Bidarrieus unit. This paper presents the description of a
Bidarrieus unit, the principle of its operation and the possibility of increasing the wind power utilization factor.
Also, the results of testing an acting laboratory model in an aerodynamic tunnel
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