Operational tests of a dual-rotor mini wind turbine

Romański, L.; Bieniek, J.; Komarnicki, Przemysław; Dębowski, Marcin; Detyna, Jerzy

doi:10.17531/ein.2016.2.7

Cited by 10 publications

(4 citation statements)

References 10 publications

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“…Placement of the rotors, the distance between each other, as well as its diameters can vary. When both rotors are placed at the upwind side of a tower (as for example in [8]), there is commonly small axial distance between them. Otherwise, bending torque caused by unevenly distributed hub weight would significantly stress tower construction.…”

Section: Introductionmentioning

confidence: 99%

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Parametric Study on a Performance of a Small Counter-Rotating Wind Turbine

Pacholczyk

Karkosiński

2020

Energies

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A small Counter-Rotating Wind Turbine (CRWT) has been proposed and its performance has been investigated numerically. Results of a parametric study have been presented in this paper. As parameters, the axial distance between rotors and a tip speed ratio of each rotor have been selected. Performance parameters have been compared with reference to a Single Rotor Wind Turbine (SRWT). Simulations were carried out with Computational Fluids Dynamics (CFD) solver and a Large Eddy Scale approach to model turbulences. An Actuator Line Model has been chosen to represent rotors in the computational domain. Summing up the results of simulation tests, it can be stated that when constructing a CRWT turbine, rotors should be placed at a distance of at least 0.5 D (where D is rotor outer diameter) or more. One can then expect a noticeable power increase compared to a single rotor turbine. Placing the second rotor closer than 0.5 D guarantees a significant increase in power, but in such configurations, dynamic interactions between the rotors are visible, resulting in fluctuations in torque and power. Dynamic interactions between rotor blades above 0.5 D are invisible.

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Section: Introductionmentioning

confidence: 99%

“…Study results of a 6 kW CRWT carried out over a period of 4 months have been presented in [20]. Operational field tests of a small CRWT have been described in [8]. Numerical investigations are mainly performed with use of the Computational Fluids Dynamics (CFD).…”

Section: Introductionmentioning

confidence: 99%

Parametric Study on a Performance of a Small Counter-Rotating Wind Turbine

Pacholczyk

Karkosiński

2020

Energies

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“…The former includes wind tunnel testing (see e.g. [6,7]) as well as field test, for example [8] or study of 6 kW CRWT carried out over a period of 4 month [9]. The later are mainly performed with use of Computational Fluids Dynamics (CFD).…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on the performance of a small counter-rotating wind turbine

2019

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The article presents results of the investigation on the performance of a small counter-rotating wind turbine. Wind turbine has been simulated using Computational Fluid Dynamics methods. Actuator Line Model has been successfully used to represent rotors in computational domain. Parametric study has been carried out, taking into account changes in the tip speed ratio of the rotors while maintaining a constant distance between upwind and downwind rotor. Study results revealed noticeable increase in power coefficient for optimal configuration. Dynamic interaction between rotors has been investigated exposing no significant interference in both torque and power.

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“…There few two CRWT configurations possible. Both rotors can be placed at upwind side, as for example in [5]. Such a configuration commonly implies small axial distance between rotors.…”

Section: Introductionmentioning

confidence: 99%

Study on the Influence of an Axial Distance Between Rotors on a Performance of a Small Counter-Rotating Wind Turbine

Pacholczyk¹,

Blecharz²,

Karkosiński³

2019

Proceedings of the 5th World Congress on New Technologies

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In this paper, results of the investigation on the performance of a small counter-rotating wind turbine has been presented. Computational Fluid Dynamics methods have been used for wind turbine simulations. Rotors representation were introduced into computational domain by means of Actuator Line Model. Influence of an axial distance of CRWT rotors has been investigated. In all studied configurations rotors were counter-rotating with exactly the same rotational speed. Results of a study revealed noticeable increase in power coefficient for optimal configuration. Dynamic interaction between rotors has been investigated exposing significant interference in both torque and power in part of considered cases. Reasonable rotors distances, as well as rotors placements on tower's sides have been proposed. Used calculation method has been found to be appropriate for counter-rotating wind turbine simulation.

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Operational tests of a dual-rotor mini wind turbine

Cited by 10 publications

References 10 publications

Parametric Study on a Performance of a Small Counter-Rotating Wind Turbine

Parametric Study on a Performance of a Small Counter-Rotating Wind Turbine

Numerical investigation on the performance of a small counter-rotating wind turbine

Study on the Influence of an Axial Distance Between Rotors on a Performance of a Small Counter-Rotating Wind Turbine

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