Aerodynamic performance prediction of a 30kW counter-rotating wind turbine system

Jung, Sung Nam; No, Tae-Soo; Ryu, Kyeong Seon

doi:10.1016/j.renene.2004.07.005

Cited by 127 publications

(87 citation statements)

References 2 publications

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“…The comparison of the power output (kW) versus wind speed is shown in Figure 5 for SRWT and CRWT. In SRWT for wind speed up to 6 m/s computationally calculated results approximately agree with the measured values [7] and after 6 m/s variation are predicted due to the extension bar provided for some distance in SRWT-CFD model comparing the experimental model. In CRWT for wind speed up to 14 m/s computationally calculated results agree well with the measured values [7] and the maximum power output of 90 kW is predicted at 14 m/s.…”

Section: Validation Of Cfd Methodsupporting

confidence: 71%

“…To validate the results based on CFD, the power output (kW) as given in Jung et al [7] for the 30 kW CRWT is computed and compared to measured values [7]. The CRWT system has 3 blades of 5.5 m diameter primary rotor and 11.0 m diameter secondary rotor.…”

Section: Validation Of Cfd Methodmentioning

confidence: 99%

“…In this case, the relative size of diameter ratio 1 : 2 is fixed as the power increase amounts to 20% [7] as well as the appropriate axial distance between the two rotors should be predicted for high-power output that extract more energy from the wind than SRWT. Leading to the objective, parametric investigations are carried out for 0.25d, 0.5d, 0.65d, and 0.75d (d-primary rotor diameter) to predict the optimum axial distance between the two rotors.…”

Section: Parametric Investigation Of Crwtmentioning

confidence: 99%

“…But the maximum efficiency obtained by contra rotors having the same area is increased to 64% [6]. Based on these studies, in order to increase the power efficiency of wind turbines on contra-rotating wind turbines (CRWT) that have two rotors rotating in opposite direction coaxially have been carried out [7][8][9][10][11][12][13][14][15]. These studies are based on the various wind turbine energy assessments and comparison of power output in CRWT with that of SRWT.…”

Section: Introductionmentioning

confidence: 99%

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Computational Analysis of 30 Kw Contra Rotor Wind Turbine

Kumar

Bensingh

Abraham

2012

ISRN Renewable Energy

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The aim of this study is to optimize and analyze the characteristics of the upwind primary rotor and the downwind secondary rotor of the contra rotor wind turbine to increase the aerodynamic performance by using computational fluid dynamic (CFD). The main objective is to provide maximum energy that can be extracted by the primary and secondary rotor from the renewable resource of wind to increase the thrust power. For this purpose, two kinds of rotor configurations which are 3-bladed single and 3-bladed contra-rotating rotor were compared by using CFD. The results of the primary and secondary rotor are validated with measurements of the 30 KW Contra rotor wind turbine available on literature and plotted for power output. The optimum axial distance between the two rotors are investigated through CFD for increased performance. In addition, the increased thrust and torque for each rotor configuration are compared for aerodynamic feasibility.

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Section: Validation Of Cfd Methodsupporting

confidence: 71%

Section: Validation Of Cfd Methodmentioning

confidence: 99%

Section: Parametric Investigation Of Crwtmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Computational Analysis of 30 Kw Contra Rotor Wind Turbine

Kumar

Bensingh

Abraham

2012

ISRN Renewable Energy

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“…Kowintec Co. Ltd. has succeeded only to increase the output of the prototype wind turbine with the gearbox (3) . On the contrary, the unit proposed here quite differs from these turbines, that is, the operation of the tandem wind rotors is in cooperation with the double rotational armature type generator without the gearbox and the pitch control mechanism.…”

Section: Introductionmentioning

confidence: 99%

Performances and Acoustic Noise of Model Intelligent Wind Power Unit

Kubo¹,

Kanemoto²

2024

RE&PQJ

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Abstract. The authors invented the superior wind power unit which is composed of the tandem wind rotors and the double rotational armature type generator without the traditional stator. The large-sized front wind rotor and the small-sized rear wind rotor drive the inner and the outer rotational armatures respectively, as for the upwind type. The unique rotational conditions of the tandem wind rotors and the fundamental performances were presented at the previous papers. Continuously, this paper discusses experimentally the effect of the blade profiles of tandem wind rotors on the performances and investigated the acoustic noise emitted from tandem wind rotors. The output of the tandem wind rotors with the desirable profiles is higher than the output of the traditional single wind rotor. The acoustic noise is induced mainly from the flow interaction between the front and the rear wind rotors, and is dominant at the blade passing frequency.

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Maximizing the Loading in Wind Turbine Plants: (A) The Betz Limit, (B) Ducting the Turbine

Georgiou¹,

Theodoropoulos²

2016

Alternative Energy and Shale Gas Encyclopedia

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Aerodynamic performance prediction of a 30kW counter-rotating wind turbine system

Cited by 127 publications

References 2 publications

Computational Analysis of 30 Kw Contra Rotor Wind Turbine

Computational Analysis of 30 Kw Contra Rotor Wind Turbine

Performances and Acoustic Noise of Model Intelligent Wind Power Unit

Maximizing the Loading in Wind Turbine Plants: (A) The Betz Limit, (B) Ducting the Turbine

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