Aerodynamic Research of the Experimental Prototype of the Variable Geometry Wind Turbine

Aleksandrs Urbahs, Margarita Urbaha, Kristīne Carjova


The aim of this research is to develop a vertical rotation axis variable geometry wind turbine (WT). The experimental prototype is being manufactured with the help of CAM (Computer-aided manufacturing) technologies – computer-based preparation of the product manufacturing process. The Institute of Aeronautics of Riga Technical University is using CNC (Computer Numerical Control) machines for manufacturing the innovative WT and its components. The aerodynamic research has been done in T-4 wind tunnel at an air flow rate from 5 m/s to 30 m/s. The power increase of the variable geometry WT is a topical issue. Installation of such WTs in wind farms is possible and is subject to further research.


Aerodynamic experiment; computer-aided manufacturing (CAM); computer numerical control (CNC); vertical rotation axis; wind tunnel; wind turbine

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A. Betz, Introduction to the Theory of Flow Machines, D. G. Randall, Trans. Oxford: Pergamon Press, 1966.

Intergovernmental panel on climate change, IPCC Special Report on Emissions Scenarios, 2015. [Online]. Available:

A. Urbahs, M. Urbaha, and K. Carjova, “Development and Assessment of Planetary Gear Unit for Experimental Prototype of Vertical Axis Wind Turbine,” Latvian Journal of Physics and Technical sciences, vol. 54, no. 5, 2017.

E. M. Fateev, Vetrodvigateli i vetroustanovki. Moscow: OGIZ, 1948.

P. Jamieson, Innovation in Wind Turbine Design. Wiley & Sons, 2011.

V. Lyatkher, Wind Power: Turbine Design, Selection, and Optimization. Wiley & Sons, 2013.

National Research Council. Assessment of Research Needs for Wind Turbine Rotor Materials Technology. Washington: National Academies Press, 1991.

V. Rodionov, Problemy nastojashhego i vozmozhnosti budushhego. Moscow: JeNAS, 2010.

Ja. I. Shefter and I. V. Rozhdestvenskij, Izobretatelju o vetrodvigateljah i vetroustanovkah. Minsk: Syelskogo Hoz-va SSSR, 1957.

A. Urbahs, L. Ribickis, and R. Scavinskis, “Wind Powered Engine,” LV patent No. LV14060, 2010.

A. Urbahs and I. Jonaite, “Features of the Use of Unmanned Aerial Vehicles for Agriculture Applications,” Aviation, vol. 17, no. 4, pp. 170–175, Dec. 2013.

A. Urbach, М. Banov, V. Turko, and K. Tsaryova, “The Characteristic Features of Composite Materials Specimen’s Static Fracture Investigated by the Acoustic Emission Method,” Applied Mechanics and Materials, vol. 232, pp. 28–32, Nov. 2012.

A. Urbahs, D. Titovs, M. Urbaha, S. Lučkinskis, and A. Aleksandrovs, “Multipurpose Alpha Mechanism for the Open-Jet Wind Tunnel,” Transport and Aerospace Engineering, vol. 1, pp. 54–59, 2014. ISSN 2255-968X.

A. Urbahs, D. Titovs, V. Petrovs, S. Luckinskis, A. Aleksandrovs, K. Eglitis, “Aerodynamic Research Organization for a Novel Concept of Extremely Short Take-Off and Landing All-Surface Hybrid,” in Proceedings of the 3rd EASN Association International Workshop on Aerostructures, Milan, Italy, October 9–11, 2013. pp. 266–275. ISSN 2309-7213. Available:

A. Urbahs, V. Petrovs, D. Titovs, S. Lučkinskis, A. Aleksandrovs, M. Urbaha, and K. Carjova, “Research of the Strain Gauge Balance Element for the Axial Force Evaluation in the Aerodynamic Experiment,” Journal of Engineering and Technology, vol. 1, pp. 173–179. 2013. ISSN 1338-2330

DOI: 10.1515/tae-2017-0015


1. Variable Size Twin-Rotor Wind Turbine
Piotr Doerffer, Krzysztof Doerffer, Tomasz Ochrymiuk, Janusz Telega
Energies  vol: 12  issue: 13  first page: 2543  year: 2019  
doi: 10.3390/en12132543


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