Pitch Angle Effect for Horizontal Axis River Current Turbine

Balaka, Ridway; Rachman, Aditya

doi:10.1016/j.proeng.2012.10.039

Cited by 6 publications

(6 citation statements)

References 14 publications

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“…Other studies attempted to optimize the characteristics of the airfoil blade for VAHT, including pitch angle, airfoil section, chamber, solidity, and more [14][15][16]. The utilization of a passive-pitch mechanism is another method for improving turbine performance [17][18][19]. Seven Energy Generation Systems (2007) reports that the adjustment of pitch angle can increase the power output up to 8%.…”

Section: Introductionmentioning

confidence: 99%

Novel Design of a Vertical Axis Hydrokinetic Turbine âStraight-Blade Cascaded (VAHTâSBC): Experimental and Numerical Simulation

Hantoro

Septyaningrum

2018

J. Eng. Technol. Sci.

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A promising technology to reduce dependency on fossil fuels is hydrokinetic energy conversion using either turbine and non-turbine technology. Hydrokinetic turbine technology is penalized by low efficiency and lack of selfstarting. This study involved experimental testing and numerical simulation of a novel hydrokinetic turbine design, called a Vertical Axis Hydrokinetic Turbine-Straight-Blade Cascaded (VAHT-SBC). Three configurations of the design were tested. Model 1 had 3 passive-pitch blades, while Model 2 and Model 3 had 6 and 9 blades respectively, where the outer blades were passive-pitch and the others fixed-blade. Both in the experimental test and in the numerical simulation Model 3 outperformed the other two models. The Cp of Model 3 was 0.42, which is very close to the theoretical Cp for VAHTs (0.45). It worked properly at low TSR. A CFD simulation based on the RANS solver was performed to gain supplementary information for performance investigation. This simulation confirmed that the torque changes because of the change in angle of attack as the turbine rotates. Because they have different numbers of blades, each model has different periodical torque fluctuation patterns. This study verified that utilization of cascaded blades and a passive-pitch mechanism is able to improve turbine performance.

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Section: Introductionmentioning

confidence: 99%

Novel Design of a Vertical Axis Hydrokinetic Turbine âStraight-Blade Cascaded (VAHTâSBC): Experimental and Numerical Simulation

Hantoro

Septyaningrum

2018

J. Eng. Technol. Sci.

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“…(3)) and this change in pressures was produced on the surface of hydrofoils which was dependent on the parameters such as fluid density, airfoil surface profile and the hydrofoil angle of attack a (Eq. ( 4)) [32,33].…”

Section: Regionmentioning

confidence: 99%

Hydrodynamic performance evaluation of a new hydrofoil design for marine current turbines

Nachtane

Tarfaoui

Saifaoui³

et al. 2020

Materials Today: Proceedings

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Tidal energy has clear potential in producing large amounts of energy as the world's capacity exceeds 120 GW. Despite being one of the oldest renewable energy sources exploited by man, the technology is still in its pre-commercialisation stage and so lags behind other renewable sources such as wind and geothermal energy in terms of development and energy produced. One of the emerging energy extraction technologies in the tidal energy field is the Horizontal Axis Hydrokinetic Turbine (HAHT) which harness tidal stream energy the same way Horizontal Axis Wind Turbine (HAWT) extract energy from the wind. While HAHT has been the topic of many researches over the past decade, design of hydrofoils plays a vital role in increasing the structural strength of the blade and maximizing the output of the marine current turbines. In this context, a numerical investigation is conducted in this research in which new hydrofoil for marine current turbines underwater conditions was designed and evaluated. The turbine blade is designed using XFLR5 code and QBlade which is a Blade-Element Momentum solver with a blade design feature. Then, the hydrodynamic performance of hydrofoil was tested using Computational Fluid Dynamics (CFD) consisting of lift and drag coefficients, and velocities distribution. The results showed that the new design of the hydrofoil of marine current turbine blade maintained a C Power value of 50% more from normal range at the TSR 5 to 9 and 51% more at TSR = 6,5 in the performance curve.

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“…The overall design parameters of the blade are shown in Table 2. The author combines the Blade Element-Momentum Theory and Wilson method to obtain the rotor power coefficient and fixed chord length formula as follows [12]:…”

Section: Blade Geometric Parameter Calculationsmentioning

confidence: 99%

Design of the Blade under Low Flow Velocity for Horizontal Axis Tidal Current Turbine

Chen

Wang

et al. 2020

JMSE

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The blade is the key component for energy capture in horizontal axis tidal current turbine, and the blade’s design is directly related to the efficiency of the power generation device. The seawater flow velocity is a crucial parameter for blade design. Since the seawater velocity changes constantly, it is extremely important to determine the design velocity of the blade. This article proposes a calculation method for the design velocity of the blade so that the designed blade can achieve better energy collection efficiency under a variable flow velocity. This study performed the following investigations: (1) The author tested and analyzed the seawater velocity variation at the experimental site, determining the designed flow velocity via calculations; (2) The author combined the blade element momentum and Wilson’s optimization design method using the MATLAB software to calculate the blade shape parameters and predict the performance under a number of different flow velocity forecasts; (3) When testing the device under sea conditions, the experimental results showed that the performance capture devices and digital projections are basically the same, which verifies the validity and effectiveness of the design method.

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Pitch Angle Effect for Horizontal Axis River Current Turbine

Cited by 6 publications

References 14 publications

Novel Design of a Vertical Axis Hydrokinetic Turbine âStraight-Blade Cascaded (VAHTâSBC): Experimental and Numerical Simulation

Novel Design of a Vertical Axis Hydrokinetic Turbine âStraight-Blade Cascaded (VAHTâSBC): Experimental and Numerical Simulation

Hydrodynamic performance evaluation of a new hydrofoil design for marine current turbines

Design of the Blade under Low Flow Velocity for Horizontal Axis Tidal Current Turbine

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Pitch Angle Effect for Horizontal Axis River Current Turbine

Cited by 6 publications

References 14 publications

Novel Design of a Vertical Axis Hydrokinetic Turbine âStraight-Blade Cascaded (VAHTâSBC): Experimental and Numerical Simulation

Novel Design of a Vertical Axis Hydrokinetic Turbine âStraight-Blade Cascaded (VAHTâSBC): Experimental and Numerical Simulation

Hydrodynamic performance evaluation of a new hydrofoil design for marine current turbines

Design of the Blade under Low Flow Velocity for Horizontal Axis Tidal Current Turbine

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Novel Design of a Vertical Axis Hydrokinetic Turbine âStraight-Blade Cascaded (VAHTâSBC): Experimental and Numerical Simulation

Novel Design of a Vertical Axis Hydrokinetic Turbine âStraight-Blade Cascaded (VAHTâSBC): Experimental and Numerical Simulation