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Exploring the Effect of Length and Angle on NACA 0010 for Diffuser Design in Tidal Current Turbines

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Abstract:

Tidal energy is one of the most predictable forms of renewable energy.Tides posses both potential and kinetic energy. Tidal energy can be utilized by capturing potential energy i.e. by means of tidal barrage and tidal fence or by capturing kinetic energy i.e. by menas of tidal current technologies. This study is focused on diffuser augmented tidal turbines that capture the kinetic energy. The power generated by a tidal turbine is directly proportional to the cube of velocity of current flow. The role of the diffuser in diffuser augmented tidal turbines is to help accelerate the incoming current velocity. Consequently, the efficiency of the turbine is significantly increasedby using adiffuser. The research community is investing considerable time and financial resources in thisgrowingdomain. The diffuser augmented tidal turbinesresearch datais rather scarce due to their emerging nature, large and costly research & development setup, startup cost and proprietary issues. The purpose of this paper is to study the effect of length and angle on NACA 0010airfoil for diffuser design. Numerical simulation is carried out to investigate velocity and mass flow rate at the throat. The drag force due to diffuser installation is also calculated.

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Periodical:

Applied Mechanics and Materials (Volumes 201-202)

Pages:

438-441

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.201-202.438

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Online since:

October 2012

Authors:

Nasir Mehmood, Liang Zhang, Jawad Khan

Keywords:

CFD Simulation of Diffuser, Diffuser Augmented Tidal Turbine, Ducted Turbine, Numerical Simulation of Diffuser, Shrouded Turbine

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] N. Mehmood, S. Qihu, W. Xiaohang and Z. Liang: Tidal Current Turbines, Proceedings of International Conference on Mechanical and Electrical Technologies Vol. 3 (2011), pp.445-450.

DOI: 10.1115/1.859810.paper329

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[2] N. Mehmood and Z. Liang: Tidal Current Technologies: Green and Renewable, Proceedings of IEEE International Conference on Computer Science and Information Technology (2011), pp.5-10.

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[3] N. Mehmood and Z. Liang: CFD Study of 2D Model of Diffuser for Harnessing Tidal Energy, Advanced Materials Research Vol. 482-484, pp.2270-2274.

DOI: 10.4028/www.scientific.net/amr.482-484.2270

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