Numerical Investigation on a Diffuser-Augmented Horizontal Axis Tidal Stream Turbine with the Entropy Production Theory

21Citations
Citations of this article
14Readers
Mendeley users who have this article in their library.

Abstract

An implication of a turbine current is the development of a wake, a reduced speed flow, thus affecting the performance of an adjoined turbine. The aim of this study is to examine the turbine wake properties to offer a basic framework for the exploration of efficient turbine arrangements through the OpenFOAM source package and the entropy production theory. The results indicate that the diffuser inlet produces the largest entropy rate; however, this dissipates quickly after the rotor plane. In terms of vorticity, the Q and λ2-criterion results are sensitive to the isosurface thresholds. In general, the Ω-Rortex method proves a convenient and accurate solution for vortex visualization and identification. For the overall mean wake structure, the velocity profile follows a tadpole-shape, whilst the velocity deficits above 100% are observed around the nacelle and throat (diffuser) and behind the tower. The concentration of maximum turbulent intensities appears behind the throat of the diffuser and at the top and bottom of the tower. Owing to the swirling effect after rotor, we proposed recommended values of b0 = 10−5 for the hydrodynamic investigation of tidal stream turbines. The present findings extend our knowledge on the flow disruption due to shrouded turbines and are particularly relevant for farm project advisors.

References Powered by Scopus

On the identification of a vortex

5974Citations
N/AReaders
Get full text

Solution of the implicitly discretised fluid flow equations by operator-splitting

4817Citations
N/AReaders
Get full text

A general classification of three-dimensional flow fields

1684Citations
N/AReaders
Get full text

Cited by Powered by Scopus

Research of the array spacing effect on wake interaction of tidal stream turbines

29Citations
N/AReaders
Get full text

A Dam Deformation Residual Correction Method for High Arch Dams Using Phase Space Reconstruction and an Optimized Long Short-Term Memory Network

24Citations
N/AReaders
Get full text

On the impact of waves and turbulence on the power fluctuations and wake structure of a tidal-stream turbine

14Citations
N/AReaders
Get full text

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Cite

CITATION STYLE

APA

Zang, W., Zheng, Y., Zhang, Y., Lin, X., Li, Y., & Fernandez-Rodriguez, E. (2023). Numerical Investigation on a Diffuser-Augmented Horizontal Axis Tidal Stream Turbine with the Entropy Production Theory. Mathematics, 11(1). https://doi.org/10.3390/math11010116

Readers' Seniority

Tooltip

Professor / Associate Prof. 2

67%

Lecturer / Post doc 1

33%

Readers' Discipline

Tooltip

Energy 6

60%

Chemical Engineering 2

20%

Mathematics 1

10%

Engineering 1

10%

Article Metrics

Tooltip
Mentions
Blog Mentions: 1
News Mentions: 1

Save time finding and organizing research with Mendeley

Sign up for free