Numerical evaluation of aerodynamic performances of vertical-axis wind turbine rotor with flow concentrator
Abstract
With wind energy extraction constantly increasing, the interest in small-scale urban wind turbines
is also expanding. Given that these machines often work in adverse operating conditions
(Earth’s boundary layer, vortex trails of surrounding objects, small and changeable wind speeds),
additional elements that locally augment wind velocity and facilitate turbine start may be installed.
This paper investigates possible benefits of adding an optimized flow concentrator to a vertical-axis
wind turbine (VAWT) rotor. Three-dimensional, unsteady, turbulent, incompressible flow simulations
of both isolated rotor consisting of three straight blades and a rotor with flow concentrator have been performed in ANSYS FLUENT by finite volume method for several different operational regimes. This type of flow simulations is challenging since flow angles are high, numerous flow phenomena and instabilities are present and the interaction between the blades and detached vortices can be significant. T...he rotational motion of the blades is solved by the unsteady Sliding Mesh (SM) approach. Flow field is modeled by Unsteady Reynolds Averaged Navier-Stokes (URANS) equations with k-ω SST turbulence model used for closure. Both quantitative and qualitative examinations of the obtained numerical results are presented. In particular, the two computed power coefficient curves are compared and the advantages of installing a flow concentrator are accentuated.
Keywords:
VAWT / flow concentrator / CFD / power coefficientSource:
8th International Conference on Renewable Electrical Power Sources, 2020, 135-141Publisher:
- Beograd : SMEITS
Funding / projects:
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200105 (University of Belgrade, Faculty of Mechanical Engineering) (RS-MESTD-inst-2020-200105)
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200026 (University of Belgrade, Institute of Chemistry, Technology and Metallurgy - IChTM) (RS-MESTD-inst-2020-200026)
Collections
Institution/Community
Mašinski fakultetTY - CONF AU - Svorcan, Jelena AU - Peković, Ognjen AU - Ivanov, Toni AU - Vorkapić, Miloš PY - 2020 UR - https://machinery.mas.bg.ac.rs/handle/123456789/4212 AB - With wind energy extraction constantly increasing, the interest in small-scale urban wind turbines is also expanding. Given that these machines often work in adverse operating conditions (Earth’s boundary layer, vortex trails of surrounding objects, small and changeable wind speeds), additional elements that locally augment wind velocity and facilitate turbine start may be installed. This paper investigates possible benefits of adding an optimized flow concentrator to a vertical-axis wind turbine (VAWT) rotor. Three-dimensional, unsteady, turbulent, incompressible flow simulations of both isolated rotor consisting of three straight blades and a rotor with flow concentrator have been performed in ANSYS FLUENT by finite volume method for several different operational regimes. This type of flow simulations is challenging since flow angles are high, numerous flow phenomena and instabilities are present and the interaction between the blades and detached vortices can be significant. The rotational motion of the blades is solved by the unsteady Sliding Mesh (SM) approach. Flow field is modeled by Unsteady Reynolds Averaged Navier-Stokes (URANS) equations with k-ω SST turbulence model used for closure. Both quantitative and qualitative examinations of the obtained numerical results are presented. In particular, the two computed power coefficient curves are compared and the advantages of installing a flow concentrator are accentuated. PB - Beograd : SMEITS C3 - 8th International Conference on Renewable Electrical Power Sources T1 - Numerical evaluation of aerodynamic performances of vertical-axis wind turbine rotor with flow concentrator EP - 141 SP - 135 UR - https://hdl.handle.net/21.15107/rcub_machinery_4212 ER -
@conference{ author = "Svorcan, Jelena and Peković, Ognjen and Ivanov, Toni and Vorkapić, Miloš", year = "2020", abstract = "With wind energy extraction constantly increasing, the interest in small-scale urban wind turbines is also expanding. Given that these machines often work in adverse operating conditions (Earth’s boundary layer, vortex trails of surrounding objects, small and changeable wind speeds), additional elements that locally augment wind velocity and facilitate turbine start may be installed. This paper investigates possible benefits of adding an optimized flow concentrator to a vertical-axis wind turbine (VAWT) rotor. Three-dimensional, unsteady, turbulent, incompressible flow simulations of both isolated rotor consisting of three straight blades and a rotor with flow concentrator have been performed in ANSYS FLUENT by finite volume method for several different operational regimes. This type of flow simulations is challenging since flow angles are high, numerous flow phenomena and instabilities are present and the interaction between the blades and detached vortices can be significant. The rotational motion of the blades is solved by the unsteady Sliding Mesh (SM) approach. Flow field is modeled by Unsteady Reynolds Averaged Navier-Stokes (URANS) equations with k-ω SST turbulence model used for closure. Both quantitative and qualitative examinations of the obtained numerical results are presented. In particular, the two computed power coefficient curves are compared and the advantages of installing a flow concentrator are accentuated.", publisher = "Beograd : SMEITS", journal = "8th International Conference on Renewable Electrical Power Sources", title = "Numerical evaluation of aerodynamic performances of vertical-axis wind turbine rotor with flow concentrator", pages = "141-135", url = "https://hdl.handle.net/21.15107/rcub_machinery_4212" }
Svorcan, J., Peković, O., Ivanov, T.,& Vorkapić, M.. (2020). Numerical evaluation of aerodynamic performances of vertical-axis wind turbine rotor with flow concentrator. in 8th International Conference on Renewable Electrical Power Sources Beograd : SMEITS., 135-141. https://hdl.handle.net/21.15107/rcub_machinery_4212
Svorcan J, Peković O, Ivanov T, Vorkapić M. Numerical evaluation of aerodynamic performances of vertical-axis wind turbine rotor with flow concentrator. in 8th International Conference on Renewable Electrical Power Sources. 2020;:135-141. https://hdl.handle.net/21.15107/rcub_machinery_4212 .
Svorcan, Jelena, Peković, Ognjen, Ivanov, Toni, Vorkapić, Miloš, "Numerical evaluation of aerodynamic performances of vertical-axis wind turbine rotor with flow concentrator" in 8th International Conference on Renewable Electrical Power Sources (2020):135-141, https://hdl.handle.net/21.15107/rcub_machinery_4212 .