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Journal articles on the topic 'Cross-Flow tidal turbine'

Author: Grafiati

Published: 15 June 2024

Last updated: 31 July 2025

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1

VENNELL, ROSS. "Tuning turbines in a tidal channel." Journal of Fluid Mechanics 663 (October 12, 2010): 253–67. http://dx.doi.org/10.1017/s0022112010003502.

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As tidal turbine farms grow they interact with the larger scale flow along a channel by increasing the channel's drag coefficient. This interaction limits a channel's potential to produce power. A 1D model for a tidal channel is combined with a theory for turbines in a channel to show that the tuning of the flow through the turbines and the density of turbines in a channel's cross-section also interact with the larger scale flow, via the drag coefficient, to determine the power available for production. To maximise turbine efficiency, i.e. the power available per turbine, farms must occupy the

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2

Vogel, C. R., and R. H. J. Willden. "Designing multi-rotor tidal turbine fences." International Marine Energy Journal 1, no. 1 (Aug) (2018): 61–70. http://dx.doi.org/10.36688/imej.1.61-70.

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An embedded Reynolds-Averaged Navier-Stokes blade element actuator disk model is used to investigate the hydrodynamic design of tidal turbines and their performance in a closely spaced cross-stream fence. Turbines designed for confined flows are found to require a larger blade solidity ratio than current turbine design practices imply in order to maximise power. Generally, maximum power can be increased by operating turbines in more confined flows than they were designed for, although this also requires the turbines to operate at a higher rotational speed, which may increase the likelihood of

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3

GARRETT, CHRIS, and PATRICK CUMMINS. "The efficiency of a turbine in a tidal channel." Journal of Fluid Mechanics 588 (September 24, 2007): 243–51. http://dx.doi.org/10.1017/s0022112007007781.

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There is an upper bound to the amount of power that can be generated by turbines in tidal channels as too many turbines merely block the flow. One condition for achievement of the upper bound is that the turbines are deployed uniformly across the channel, with all the flow through them, but this may interfere with other uses of the channel. An isolated turbine is more effective in a channel than in an unbounded flow, but the current downstream is non-uniform between the wake of the turbines and the free stream. Hence some energy is lost when these streams merge, as may occur in a long channel.

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4

VENNELL, ROSS. "Tuning tidal turbines in-concert to maximise farm efficiency." Journal of Fluid Mechanics 671 (March 7, 2011): 587–604. http://dx.doi.org/10.1017/s0022112010006191.

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Tuning is essential to maximise the output of turbines extracting power from tidal currents. To realise a large fraction of a narrow channel's potential, rows of turbines not only have to be tuned for a particular tidal channel, they must also be tuned in the presence of all the other rows, i.e. ‘tuned in-concert’. The necessity for in-concert tuning to maximise farm efficiency occurs because the tuning of any one row affects a channel's total drag coefficient and hence the flow through all other rows. Surprisingly, in several circumstances the optimal in-concert tunings are the same or almost

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5

Hoerner, Stefan, Iring Kösters, Laure Vignal, et al. "Cross-Flow Tidal Turbines with Highly Flexible Blades—Experimental Flow Field Investigations at Strong Fluid–Structure Interactions." Energies 14, no. 4 (2021): 797. http://dx.doi.org/10.3390/en14040797.

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Oscillating hydrofoils were installed in a water tunnel as a surrogate model for a hydrokinetic cross-flow tidal turbine, enabling the study of the effect of flexible blades on the performance of those devices with high ecological potential. The study focuses on a single tip-speed ratio (equal to 2), the key non-dimensional parameter describing the operating point, and solidity (equal to 1.5), quantifying the robustness of the turbine shape. Both parameters are standard values for cross-flow tidal turbines. Those lead to highly dynamic characteristics in the flow field dominated by dynamic sta

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Draper, S., T. Nishino, T. A. A. Adcock, and P. H. Taylor. "Performance of an ideal turbine in an inviscid shear flow." Journal of Fluid Mechanics 796 (April 28, 2016): 86–112. http://dx.doi.org/10.1017/jfm.2016.247.

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Although wind and tidal turbines operate in turbulent shear flow, most theoretical results concerning turbine performance, such as the well-known Betz limit, assume the upstream velocity profile is uniform. To improve on these existing results we extend the classical actuator disc model in this paper to investigate the performance of an ideal turbine in steady, inviscid shear flow. The model is developed on the assumption that there is negligible lateral interaction in the flow passing through the disc and that the actuator applies a uniform resistance across its area. With these assumptions,

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7

Bennecke, Timo, Shokoofeh Abbaszadeh, Karla Ruiz-Hussmann, et al. "Methodology to capture the single blade loads on a cross-flow tidal turbine flume model." International Marine Energy Journal 8, no. 2 (2025): 197–206. https://doi.org/10.36688/imej.8.197-206.

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The OPTIDE project aims to improve the efficiency and durability of hydrokinetic cross-flow tidal turbines (CFTT). CFTT are attractive for the exploitation of tidal energy, because of high area-based power densities of such turbine arrays, a simple design and the ability to operate under varying flow conditions.Nevertheless, the efficiency of single CFTT is lower relative to the most commonly used axial turbine type. Furthermore the life time is often limited due to alternating and pulsating stresses.A promising approach to overcome these drawbacks is intracycle blade pitching. In this case th

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8

Ruiz-Hussmann, Karla, Pierre-Luc Delafin, Cyrille Bonamy, Yves Delannoy, Dominique Thévenin, and Stefan Hoerner. "Objective Functions for the Blade Shape Optimisation of a Cross-Flow Tidal Turbine under Constraints." International Marine Energy Journal 8, no. 1 (2025): 47–55. https://doi.org/10.36688/imej.8.47-55.

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Hydro-kinetic cross-flow tidal turbines (CFTT) are omni-directional and offer higher area-based power density compared to horizontal-axis tidal turbines, making them very attractive for tidal energy exploitation. However, the rotating motion around the vertical axis results in continuously varying angles of attack, causing alternating loads, which may lead to fatigue failure and structural damage. The OPTIDE Project addresses these challenges by implementing intracycle blade pitching to individually control the angle of attack, increasing the power coefficient CP and reducing structural loads.

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9

Nishino, Takafumi, and Richard H. J. Willden. "The efficiency of an array of tidal turbines partially blocking a wide channel." Journal of Fluid Mechanics 708 (August 20, 2012): 596–606. http://dx.doi.org/10.1017/jfm.2012.349.

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AbstractA new theoretical model is proposed to explore the efficiency of a long array of tidal turbines partially blocking a wide channel cross-section. An idea of scale separation is introduced between the flow around each device (or turbine) and that around the entire array to assume that all device-scale flow events, including ‘far-wake’ mixing behind each device, take place much faster than the horizontal expansion of the flow around the entire array. This assumption makes it possible to model the flow as a combination of two quasi-inviscid problems of different scales, in both of which th

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10

Rahmani, Hamid, Mojtaba Biglari, Mohammad Sadegh Valipour, and Kamran Lari. "Assessment of the numerical and experimental performance of screw tidal turbines." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 232, no. 7 (2018): 912–25. http://dx.doi.org/10.1177/0957650917753778.

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This study was aimed at the numerical and experimental modeling of water flow during collision between water and vertical screw turbine blades with different cross sections (i.e. Darrieus, spoon, and airfoil). ANSYS Fluent was used to model water flow under tidal currents in a flume, and mesh independence was ensured after the selection of appropriate geometry. The collision problem was then solved in the transient state, and results on the momentum and power generated by different inlet velocities and different blade cross sections were analyzed. The findings showed that torque and turbine po

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11

Pucci, Micol, Debora Bellafiore, Stefania Zanforlin, Benedetto Rocchio, and Georg Umgiesser. "Embedding of a Blade-Element Analytical Model into the SHYFEM Marine Circulation Code to Predict the Performance of Cross-Flow Turbines." Journal of Marine Science and Engineering 8, no. 12 (2020): 1010. http://dx.doi.org/10.3390/jmse8121010.

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Our aim was to embed a 2D analytical model of a cross-flow tidal turbine inside the open-source SHYFEM marine circulation code. Other studies on the environmental impact of Tidal Energy Converters use marine circulation codes with simplified approaches: performance coefficients are fixed a priori regardless of the operating conditions and turbine geometrical parameters, and usually, the computational grid is so coarse that the device occupies one or few cells. In this work, a hybrid analytical computational fluid dynamic model based on Blade Element Momentum theory is implemented: since the tu

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12

Rowell, Matthew, Martin Wosnik, Jason Barnes, and Jeffrey P. King. "Experimental Evaluation of a Mixer-Ejector Marine Hydrokinetic Turbine at Two Open-Water Tidal Energy Test Sites in NH and MA." Marine Technology Society Journal 47, no. 4 (2013): 67–79. http://dx.doi.org/10.4031/mtsj.47.4.15.

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AbstractFor marine hydrokinetic energy to become viable, it is essential to develop energy conversion devices that are able to extract energy with high efficiency from a wide range of flow conditions and to field test them in an environment similar to the one they are designed to eventually operate in. FloDesign Inc. developed and built a mixer-ejector hydrokinetic turbine (MEHT) that encloses the turbine in a specially designed shroud that promotes wake mixing to enable increased mass flow through the turbine rotor. A scaled version of this turbine was evaluated experimentally, deployed below

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13

Hoerner, Stefan, Roberto Leidhold, Shokoofeh Abbaszadeh, et al. "experimental optimization environment for developing an intracycle pitch control in cross flow turbines." International Marine Energy Journal 8, no. 1 (2025): 37–46. https://doi.org/10.36688/imej.8.37-46.

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Cross-flow tidal turbines have not reached the efficiency of horizontal-axis turbines. Among various improvement approaches found in the literature, the intracycle pitch control is one of the most promising ones. It consists in actively pitching each blade as function of the azimuth angle. This paper presents the development of an experimental environment to optimize the intracycle control for cross-flow tidal turbines, the aim of the project OPTIDE, a collaboration of the Otto-von-Guericke-University Magdeburg, Germany, the University Grenoble-Alpes in France and the University of Applied Sci

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14

Agit Prakoso, Sayyid Alkahfi, Tri Mulyanto, and Sunyoto . "Perancangan Dan Simulasi Performa Prototipe Turbin Air Tidal Tipe Propeler Naca S814 Sebagai Sumber Energi Petani Tambak Garam Daerah Cirebon." Jurnal Pendidikan Teknik Mesin Undiksha 10, no. 1 (2022): 86–103. http://dx.doi.org/10.23887/jptm.v10i1.45389.

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Telah dilakukan perancangan dan pengujian performa turbin air tidal untuk penggerak pompa di tambak garam menggunakan blade hydrofoil standar NACA S814 untuk menghasilkan desain turbin tidal, optimasi bilah turbin tidal dan juga coefficient of power (Cp) pada turbin tidal. Perancangan geometri turbin tidal menggunakan rumus yang tersedia dan pengujian turbin tidal menggunakan bantuan software Qblade. Variasi kecepatan aliran air yang pertama 1 m/s, Variasi kecepatan aliran air yang kedua 1,536 m/s, Variasi kecepatan aliran air yang ketiga 2,072 m/s, Variasi kecepatan aliran air yang keempat 2,

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15

Wang, Yi, Bin Guo, Fengmei Jing, and Yunlei Mei. "Hydrodynamic Performance and Flow Field Characteristics of Tidal Current Energy Turbine with and without Winglets." Journal of Marine Science and Engineering 11, no. 12 (2023): 2344. http://dx.doi.org/10.3390/jmse11122344.

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In order to gain a more comprehensive understanding of the influence of winglets on the hydrodynamic performance and flow field characteristics of tidal current energy turbines, two different shapes of winglets are designed, and numerical simulation results for turbines with and without winglets are compared and analyzed. The results show that both shapes of winglets can improve the energy conversion efficiency, and the winglets with a cant angle (60°) are more effective than the flat (0°) winglets; the winglets transfer the tip vortices to the winglet tips and weaken the tip vortices, increas

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16

Rumaherang, Wulfilla Maxmilian, and Jonny Latuny. "FLUID FLOW STUDY IN VARIOUS SHAPES AND SIZES OF HORIZONTAL AXIS SEA CURRENT TURBINE." SINERGI 25, no. 3 (2021): 289. http://dx.doi.org/10.22441/sinergi.2021.3.006.

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The ducted tidal turbine models have been developed to utilize the conversion of the kinetic energy on ocean currents. The research in refining the turbine characteristics has been carried out by modifying the turbine’s shape and size. This study investigated flow characteristics in the meridional section of five ducted turbines models for seawater flow with velocity U0 = 1.5 m/s. The ducted turbine design and construction have five different impeller house diameters and fixed inlet and outlet diameters. The potential energy flow theory and experimental data are used to analyze the flow charac

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17

Garrett, Chris, and Patrick Cummins. "The power potential of tidal currents in channels." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 461, no. 2060 (2005): 2563–72. http://dx.doi.org/10.1098/rspa.2005.1494.

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Interest in sources of renewable energy has led to increasing attention being paid to the potential of strong tidal currents. There is a limit to the available power, however, as too many turbines will merely block the flow, reducing the power generated. The maximum average power available from a tidal stream along a channel, such as that between an island and the mainland, is estimated and found to be typically considerably less than the average kinetic energy flux in the undisturbed state through the most constricted cross-section of the channel. A general formula gives the maximum average p

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18

Kara-Mostefa, Mohamed-Larbi, Ludovic Chatellier, and Lionel Thomas. "Effect of Vertical Confinement and Blade Flexibility on Cross-Flow Turbines." Energies 16, no. 9 (2023): 3693. http://dx.doi.org/10.3390/en16093693.

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Both scientific and industrial communities have a growing interest in marine renewable energies. There is a wide variety of technologies in this domain, with different degrees of maturity. This study focuses on two models of a mast-free vertical axis Darrieus tidal turbine with the objective of characterizing the effect of vertical confinement, rotor configuration, and fluid–structure interactions on their performances in free-surface flows. The first model comprised four straight rigid blades maintained by circular flanges on both ends of the rotor and the second model is equipped with free-e

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19

NAKASE, Yoshiyuki, Junichiro FUKUTOMI, and Hirotaka IIDA. "A study of the cross-flow turbine for tidal power generation. 1st report The characteristics of a cross-flow turbine with symmetrical nozzle shapes." Transactions of the Japan Society of Mechanical Engineers Series B 52, no. 473 (1986): 367–71. http://dx.doi.org/10.1299/kikaib.52.367.

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20

Gaurier, Benoît, Grégory Germain, and Jean-Valéry Facq. "Determination of the Response Amplitude Operator of a tidal turbine as a spectral transfer function." International Marine Energy Journal 5, no. 2 (2022): 151–60. http://dx.doi.org/10.36688/imej.5.151-160.

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A transfer function determination method is proposed in this study to predict the unsteady fluctuations of the performance of a tidal turbine model. This method is derived from the Response Amplitude Operator (RAO) applied in the offshore industry to predict linear wave-induced loads on large structures. It is based on a spectral approach and requires the acquisition of a turbine parameter (e.g. torque, thrust, power or root-blade force) in synchronization with an upstream flow velocity measurement. On the frequency range where the causality between these two signals is proven, the transfer fu

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21

Zanforlin, Stefania, Fulvio Buzzi, and Marika Francesconi. "Performance Analysis of Hydrofoil Shaped and Bi-Directional Diffusers for Cross Flow Tidal Turbines in Single and Double-Rotor Configurations." Energies 12, no. 2 (2019): 272. http://dx.doi.org/10.3390/en12020272.

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With the aim of finding efficient solutions for cross flow turbine (CFT) bi-directional diffusers able to harvest non perfectly rectilinear tidal currents, a 2D CFD analysis of ducted CFTs was carried out with focus on the effects of diffuser shape and yaw angle. The HARVEST hydrofoil shaped diffuser, equipped with a pair of counter-rotating turbines, and a bi-directional symmetrical diffuser were compared in terms of coefficient of power (CP), torque ripple, overall thrust on diffuser and wake characteristics. Slightly better CP were predicted for the symmetrical diffuser, due to the converge

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22

Gebreslassie, Mulualem G., Gavin R. Tabor, and Michael R. Belmont. "Numerical simulation of a new type of cross flow tidal turbine using OpenFOAM – Part II: Investigation of turbine-to-turbine interaction." Renewable Energy 50 (February 2013): 1005–13. http://dx.doi.org/10.1016/j.renene.2012.08.064.

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23

Pucci, Micol, Stefania Zanforlin, Debora Bellafiore, Stefano Deluca, and Georg Umgiesser. "A Double Multiple Stream Tube (DMST) routine for site assessment to select efficient turbine aspect ratios and solidities in real marine environments." E3S Web of Conferences 312 (2021): 08001. http://dx.doi.org/10.1051/e3sconf/202131208001.

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A MATLAB routine, based on a Double Multiple Stream Tube model, developed to quickly predict the performance of cross-flow hydrokinetic turbine, here is presented. The routine evaluate flow data obtained with the open-source marine circulation code SHYFEM. The tool can establish the best locations to place tidal devices taking into account bathymetric constraints and the hydrokinetic potential. Hence, it can be used to decide the best set of geometrical parameters. The geometrical variables of our analysis are turbine frontal area, aspect ratio and solidity. Several sub-models, validated with

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24

Gorban’, Alexander N., Alexander M. Gorlov, and Valentin M. Silantyev. "Limits of the Turbine Efficiency for Free Fluid Flow." Journal of Energy Resources Technology 123, no. 4 (2001): 311–17. http://dx.doi.org/10.1115/1.1414137.

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An accurate estimate of the theoretical power limit of turbines in free fluid flows is important because of growing interest in the development of wind power and zero-head water power resources. The latter includes the huge kinetic energy of ocean currents, tidal streams, and rivers without dams. Knowledge of turbine efficiency limits helps to optimize design of hydro and wind power farms. An explicitly solvable new mathematical model for estimating the maximum efficiency of turbines in a free (nonducted) fluid is presented. This result can be used for hydropower turbines where construction of

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25

Borg, Mitchell G., Qing Xiao, Steven Allsop, Atilla Incecik, and Christophe Peyrard. "A Numerical Swallowing-Capacity Analysis of a Vacant, Cylindrical, Bi-Directional Tidal Turbine Duct in Aligned & Yawed Flow Conditions." Journal of Marine Science and Engineering 9, no. 2 (2021): 182. http://dx.doi.org/10.3390/jmse9020182.

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Introducing a duct along the perimeter of a rotor has been acknowledged to augment turbine performance. The outcome causation due to a bi-directional, cylindrical shroud, however, is uncertain. This study analyses the hydrodynamic swallowing capacity of a true-scale, vacant duct for tidal turbine applications in aligned and yawed inlet flow conditions by utilising three-dimensional unsteady computational fluid dynamics. The performance is investigated within free-stream magnitudes of 1 to 7 m.s−1, and a bearing angular range of 0° to 45° with the duct axis. In proportion to the free-stream mag

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26

Paillard, B., J. A. Astolfi, and F. Hauville. "URANSE simulation of an active variable-pitch cross-flow Darrieus tidal turbine: Sinusoidal pitch function investigation." International Journal of Marine Energy 11 (September 2015): 9–26. http://dx.doi.org/10.1016/j.ijome.2015.03.001.

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27

Zhao, Muyu, Ying Chen, and Jin Jiang. "Hydrodynamics and Wake Flow Analysis of a Floating Twin-Rotor Horizontal Axis Tidal Current Turbine in Roll Motion." Journal of Marine Science and Engineering 11, no. 8 (2023): 1615. http://dx.doi.org/10.3390/jmse11081615.

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The study of hydrodynamic characteristics of floating double-rotor horizontal axis tidal current turbines (FDHATTs) is of great significance for the development of tidal current energy. In this paper, the effect of roll motion on a FDHATT is investigated using the Computational Fluid Dynamics (CFD) method. The analysis was conducted in the CFD software STAR-CCM+ using the Reynolds-averaged Navier–Stokes method. The effects of different roll periods and tip speed ratios on the power coefficient and thrust coefficient of FDHATT were studied, and then the changes in the vorticity field and veloci

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28

Sentchev, Alexei, Thinh Duc Nguyen, Lucille Furgerot, and Pascal Bailly du Bois. "Underway velocity measurements in the Alderney Race: towards a three-dimensional representation of tidal motions." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 378, no. 2178 (2020): 20190491. http://dx.doi.org/10.1098/rsta.2019.0491.

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The Alderney Race, located northwest of the Cotentin Peninsula (France), is a site with high tidal-stream energy potential. Circulation through the Alderney Race is complex, with current speed exceeding 3 m s −1 at neap tide. Towed acoustic Doppler current profiler (ADCP) measurements and static point velocity measurements were performed in July 2018 focusing on assessment of circulation and vertical structure of tidal currents. Transect surveys revealed peculiar features of local dynamics such as change in location of the tidal jet on ebb and flood flow. The spatial expanse of the tidal jet w

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Allmark, Matthew, Rodrigo Martinez, Stephanie Ordonez-Sanchez, et al. "A Phenomenological Study of Lab-Scale Tidal Turbine Loading under Combined Irregular Wave and Shear Flow Conditions." Journal of Marine Science and Engineering 9, no. 6 (2021): 593. http://dx.doi.org/10.3390/jmse9060593.

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Tidal devices are likely to faced with shear flows and subjected to various wave climates. The paper presents an experimental study of the combined impacts of shear profile and irregular waves on the loading of a 1/20th scale device operating at peak power extraction. The experiments presented were conducted at various depths to facilitate analysis of the effects of the shear flow and wave impact on the device at various positions in the water column. The fluid field was measured at three different upstream positions and at three depths (top, middle and bottom of the rotor) for each experiment

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30

NAKASE, Yoshiyuki, Junichiro FUKUTOMI, and Yasushi FUKE. "Study of a cross-flow turbine for tidal power generation. 2nd report Effect of the changes of flow passage area on the turbine with symmetrical nozzle shapes." Transactions of the Japan Society of Mechanical Engineers Series B 53, no. 486 (1987): 500–504. http://dx.doi.org/10.1299/kikaib.53.500.

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Wijaya, Rudi Kusuma, and Iwan Kurniawan. "Study Experimental Darrieus Type-H Water Turbines Using NACA 2415 Standard Hydrofoil Blade." Jurnal Pendidikan Teknik Mesin Undiksha 9, no. 2 (2021): 109–23. http://dx.doi.org/10.23887/jptm.v9i2.29257.

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Telah dilakukan kaji eksperimental turbin air Darrieus tipe-H menggunakan blade hydrofoil standar NACA 2415 untuk mengetahui nilai torsi statik dan dinamik yang dihasilkan turbin air Darrieus tipe-H 3 blade dan 6 blade, pengujian menggunakan water tunnel dimensi 6m x 0.6m x 1m. Variasi tiga blade dan enam blade, dengan diameter turbin 0.44 m x 0.15 m pada turbin luar dan 0.18 x 0.14 m pada turbin bagian dalam, panjang chord 0.10 m dengan variasi sudut serang 0º sampai dengan 360º, variasi kecepatan air pertama 0.3 m/s, variasi kecepatan aliran air kedua 0.65 m/s. Kecepatan air 0.3 m/s enam bla

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Gebreslassie, Mulualem G., Gavin R. Tabor, and Michael R. Belmont. "Numerical simulation of a new type of cross flow tidal turbine using OpenFOAM – Part I: Calibration of energy extraction." Renewable Energy 50 (February 2013): 994–1004. http://dx.doi.org/10.1016/j.renene.2012.08.065.

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Muhyiddin Mohammed, Shamsul Sarip, Sa’ardin Abdul Aziz, and Wan Azani Mustafa. "Systematic Review of Computational Fluid Dynamics Modelling and Simulation Techniques Employed in Vertical Axis Hydrokinetic Turbines." Journal of Advanced Research in Applied Mechanics 117, no. 1 (2024): 51–71. http://dx.doi.org/10.37934/aram.117.1.5171.

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At present, Computational Fluid Dynamics (CFD) is being utilized to explore tidal and hydrokinetic turbine systems, advancing comprehension of turbulent flow phenomena and raising the accuracy of performance predictions for these fluid-driven turbines. Consequently, this utilization of CFD contributes to the optimization of efficiency in these devices. Turbines are subject to variations from the best design point due to the influence of fluctuating flow rates, despite the findings of recent research that have identified the ideal design points. In contrast to conventional literature reviews, s

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Zhang, Xiangyun, Wuping Yao, Lan Ding, and Bin Huang. "Multi-Objective Optimization Design of Dynamic Performance of Hydrofoil with Gurney Flap." Journal of Marine Science and Engineering 12, no. 7 (2024): 1147. http://dx.doi.org/10.3390/jmse12071147.

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The horizontal axis tidal turbine, as a crucial device for capturing tidal energy, has gained significant attention because it has better energy efficiency performance. Enhancing the performance of foils, a vital part of tidal turbine blades, can significantly improve tidal turbine performance. Among numerous methods to enhance the foil performance, the Gurney flap has gained significant attention due to its avoidance of complex structural design. Currently, there is limited research on optimizing the design of Gurney flaps while considering the dynamic performance of foils. In this study, the

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Schmitt, Pal, and Desmond Robinson. "Coupled Actuator Line and Finite Element Analysis Tool." OpenFOAM® Journal 2 (May 2, 2022): 81–93. http://dx.doi.org/10.51560/ofj.v2.51.

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Fluid-dynamic loading of many solid bodies can be simulated using geometry resolving computational fluid dynamics methods, where the body's shape is resolved in the mesh. In some cases though slender bodies, like ropes or cables, spars, turbine blades, foils and lattice structures would require prohibitively high cell counts, since the geometrical features to be resolve are much smaller than the overall domain. Such bodies are usually made up of generic cross sections like round, square or standardised technical profiles like the famous NACA digit series for which good parametrisations of reac

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Dhar, Nilotpal, Charlie J. Lloyd, John Walker, and Robert M. Dorrell. "The Influence of Structural Design on the Hydrodynamics of Floating Offshore Wind Turbine Platforms." Journal of Marine Science and Engineering 13, no. 2 (2025): 248. https://doi.org/10.3390/jmse13020248.

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Floating offshore wind turbine (FOWT) platforms are subject to a wide range of hydrodynamic loading and dynamic movement, making hydrodynamic force evaluation difficult. Amongst various floating platforms, submersible platforms are structurally complex, with multiple members held together by cross-braces. The influence of these members on hydrodynamic loading is poorly understood. An investigation of the effect of these members on loads is essential to optimise the design of FOWT platforms, mooring systems, and protective coatings, leading to a reduction in construction and maintenance costs.

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Sutherland, Duncan, Stephanie Ordonez-Sanchez, Michael R. Belmont, et al. "Experimental optimisation of power for large arrays of cross-flow tidal turbines." Renewable Energy 116 (February 2018): 685–96. http://dx.doi.org/10.1016/j.renene.2017.10.011.

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Stringer, R. M., A. J. Hillis, and J. Zang. "Numerical investigation of laboratory tested cross-flow tidal turbines and Reynolds number scaling." Renewable Energy 85 (January 2016): 1316–27. http://dx.doi.org/10.1016/j.renene.2015.07.081.

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Nishino, Takafumi, and Richard H. J. Willden. "Two-scale dynamics of flow past a partial cross-stream array of tidal turbines." Journal of Fluid Mechanics 730 (July 30, 2013): 220–44. http://dx.doi.org/10.1017/jfm.2013.340.

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AbstractThe characteristics of flow past a partial cross-stream array of (idealized) tidal turbines are investigated both analytically and computationally to understand the mechanisms that determine the limiting performance of partial tidal fences. A two-scale analytical partial tidal fence model reported earlier is further extended by better accounting for the effect of array-scale flow expansion on device-scale dynamics, so that the new model is applicable to short fences (consisting of a small number of devices) as well as to long fences. The new model explains theoretically general trends

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Ridwan, Ridwan. "PERANCANGAN MODEL AIR ALIRAN SILANG (CROSS FLOW TURBINE) DENGAN HEAD 2 m DAN DEBIT 0,03 m3/s." Jurnal Teknik Mesin 3, no. 3 (2017): 7. http://dx.doi.org/10.22441/jtm.v3i3.1023.

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Pembangkit listrik tenaga mikrohidro merupakan pembangkit listrik skala kecil yang menggunakan air sebagai penggeraknya dan penggerak mula adalah turbin. Sistem pembangkit ini sangat tepat digunakan di pedesaan karena sistem ini mudah dibuat, menghasilkan daya listrik yang cukup besar dan biaya pembuatan yang lebih relatif murah. Atas dasar diatas maka perlu dirancang suatu turbin yang mendukung sistem pembangkit ini, diantaranya adalah Turbin Aliran Silang. Untuk merancang sebuah turbin air agar tidak terjadi kesalahan dalam perancangan (seperti hal-nya biaya pembuatannya) maka dilakukan pera

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Jasa, Lie, and I. Putu Ardana. "Disain Turbin Model Nest-Lie Untuk Mikro Hidro." Majalah Ilmiah Teknologi Elektro 17, no. 2 (2018): 393. http://dx.doi.org/10.24843/mite.2018.v17i02.p19.

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Abstract — Air merupakan salah satu sumber energi yang potesinnya besar dan tersebar di seluruh wilayah Indonesia. Masalah utama dari pembangkit tenaga air adalah debit air yang mengalir tidak kontinyu sepanjang tahun. Karakteristik lokasi masing-masing penempatan mikro hidro adalah unik. Sebuah mikro hidro yang ditempatkan pada lokasi tertentu diperlukan turbin yang sesuai dengan karakteristik lokasi yang ada. Dalam penelitian ini dirancang turbin untuk mendapatkan turbin model Nest-Lie jenis baru yang mengakomodir semua parameter lokasi yang ada. Metode yang dilakukan adalah (1). Memanfaatka

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Tarmizi, Achmad, and Herry Wardono. "Studi Kelayakan Dan Perancangan Serta Implementasi Turbin Pada Proyek PLTMH Di Kabupaten Sleman Yogyakarta." Jurnal Profesi Insinyur Universitas Lampung 1, no. 2 (2020): 28–39. http://dx.doi.org/10.23960/jpi.v1n2.48.

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Pemerintah Daerah Kabupaten Sleman akan membangun PLTMH dengan memanfaatkan potensi tenaga air di desa Girikerto yang merupakan salah satu sumber energi terbarukan. Penelitian ini didasarkan pada hasil studi kelayakan yang dilakukan penulis dengan melakukan studi lapangan untuk mengambil data-data dilokasi dengan memperhatikan aspek teknis, ekonomis dan sosial, kemudian dilakukan studi literatur dan analisis data untuk menentukan jenis turbin dan karakteristik yang paling tepat untuk PLTMH dilokasi tersebut. Dari hasil analisis data dan dengan melakukan perhitungan yang teliti serta dengan mem

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Mudzakir, Rizal, Haryadi Haryadi, and Heri Widiantoro. "Simulasi CFD Turbin Francis Skala Laboratorium Sebagai Alat Bantu Praktikum Menggunakan Software Solidwork." Jurnal Rekayasa Mesin 19, no. 2 (2024): 223–32. https://doi.org/10.32497/jrm.v19i2.5108.

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Turbin Francis adalah jenis turbin yang paling banyak digunakan di pembangkit listrik tenaga air, karena efisiensinya relatif tinggi dalam rentang operasi yang cukup luas. Namun, alat bantu praktek untuk pengajaran turbin Francis yang dibutuhkan untuk pembelajaran jarang tersedia. Alat bantu praktek dan pengajaran masih diimpor dari luar negeri dengan harga yang relatif mahal. Studi literatur menunjukkan bahwa alat bantu praktek untuk turbin cross flow dan turbin propeller berhasil dibuat, namun alat bantu praktek turbin Francis belum banyak ditemukan di dalam negeri hingga saat ini. Pada pene

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Qu, Hengliang, Xueyan Li, and Xiaochen Dong. "Numerical Study on Hydrodynamic Performance of a Pitching Hydrofoil with Chordwise and Spanwise Deformation." Journal of Marine Science and Engineering 12, no. 5 (2024): 830. http://dx.doi.org/10.3390/jmse12050830.

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The hydrofoil plays a crucial role in tidal current energy (TCE) devices, such as horizontal-axis turbines (HATs), vertical-axis turbines (VATs), and oscillating hydrofoils. This study delves into the numerical investigation of passive chordwise and spanwise deformations and the hydrodynamic performance of a deformable hydrofoil. Three-dimensional (3D) coupled fluid–structure interaction (FSI) simulations were conducted using the ANSYS Workbench platform, integrating computational fluid dynamics (CFD) and finite element analysis (FEA). The simulation involved a deformable hydrofoil undergoing

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Ihsan, Ahmad, Julia Azriana, Oreza Sativa, T. Miftanul Syubb’an, Wahyu Abdillah, and Nasruddin Abdullah. "MENYINARI MASA DEPAN: STRATEGI OPTIMALISASI PEMBANGKIT LISTRIK MIKROHIDRO UNTUK KESEJAHTERAAN DESA SELAMAT, ACEH TAMIANG." Jurnal Masyarakat Berdikari dan Berkarya (Mardika) 2, no. 1 (2024): 10–16. http://dx.doi.org/10.55377/mardika.v2i1.9637.

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PLTMH, Pembangkit Listrik Tenaga Mikrohidro, adalah solusi vital untuk meningkatkan ketersediaan listrik di daerah terpencil seperti Desa Selamat, Kecamatan Tenggulun, Kabupaten Aceh Tamiang. Dengan energi listrik yang sangat penting bagi masyarakat di daerah pedalaman dan pegunungan yang belum terjangkau oleh jaringan distribusi PLN, PLTMH memanfaatkan sungai dan aliran irigasi sebagai sumber energi terbarukan. Desa Selamat memiliki potensi hidro yang dapat dimanfaatkan baik untuk irigasi pertanian maupun sebagai pembangkit listrik. Pengembangan potensi sumber daya energi alternatif, seperti

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Lesmana, I. Putu Dody, Beni Widiawan, and Rosa Tri Hertamawati. "Pengembangan Teknologi Energi Terbarukan Terpadu Melalui Pemanfaatan Mikrohidro dan Biogas Komunal Pada Kawasan Tertinggal Desa Gelang Kabupaten Jember." J-Dinamika : Jurnal Pengabdian Masyarakat 7, no. 2 (2022): 275–80. http://dx.doi.org/10.25047/j-dinamika.v7i2.3309.

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    Desa Gelang merupakan salah satu desa yang terletak di lereng Gunung Argopuro, Kabupaten Jember. Kondisi geografis Desa Gelang khususnya Dusun Lanasan memiliki perkebunan teh dan kopi seluas ±5.205,245 Ha. Walaupun Dusun Lanasan memiliki agrowisata menarik, tetapi tidak adanya listrik mengganggu aktivitas perekonomian dan mobilitas warganya. Selain itu, warga Dusun Lanasan yang memiliki 32 sapi dan 60 kambing menghasilkan limbah kotoran ±800 Kg per-hari dimana limbah kotoran hanya ditumpuk sehingga terlihat kotor dan menyebarkan bau tidak sedap. Melalui pengabdian m

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Hoerner, Stefan, Shokoofeh Abbaszadeh, Olivier Cleynen, Cyrille Bonamy, Thierry Maître, and Dominique Thévenin. "Passive flow control mechanisms with bioinspired flexible blades in cross-flow tidal turbines." Experiments in Fluids 62, no. 5 (2021). http://dx.doi.org/10.1007/s00348-021-03186-8.

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Abstract State-of-the-art technologies for wind and tidal energy exploitation focus mostly on axial turbines. However, cross-flow hydrokinetic tidal turbines possess interesting features, such as higher area-based power density in array installations and shallow water, as well as a generally simpler design. Up to now, the highly unsteady flow conditions and cyclic blade stall have hindered deployment at large scales because of the resulting low single-turbine efficiency and fatigue failure challenges. Concepts exist which overcome these drawbacks by actively controlling the flow, at the cost o

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Schmitz, Christian, and Peter F. Pelz. "Optimal control of tidal flow." Journal of Fluid Mechanics 962 (May 4, 2023). http://dx.doi.org/10.1017/jfm.2023.172.

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The tidal flow through a channel connecting two basins with different tidal regimes can be optimally controlled by means of a turbine fence or array to maximise the extracted mechanical power. The paper gives the optimal control strategy as a function of the blockage ratio $\sigma$ , i.e. the ratio of the turbine cross-section to the cross-section of the local passage of a turbine. The results presented are a physically consistent generalisation of the results of Garrett & Cummins (Proc. R. Soc. Lond. A, vol. 461, 2060, pp, 2563–2572), valid only for $\sigma =1$ and turbine efficiency of o

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Huchet, Marion, Eloi Droniou, Larissa Perez, et al. "Wake characterization of tidal turbines in the Pentland Firth using vessel-mounted ADCP measurements." Proceedings of the European Wave and Tidal Energy Conference 15 (September 2, 2023). http://dx.doi.org/10.36688/ewtec-2023-456.

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Knowledge of the extension and velocity deficit induced by tidal turbine wakes is crucial for the optimization of tidal farm layouts, as the wake induced by an upstream turbine may substantially affect the power and loadings of a device located downstream. The MeyGen project is the largest planned tidal stream energy project in the world: it aims to develop up to 398 MW of installed power in the Pentland Firth, Scotland, a site with current velocities reaching up to 5 m/s. During Phase 1 of the project, four 1.5 MW turbines were installed, providing a valuable opportunity to investigate turbin

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Tsuru, Wakana, Yoichi Kinoue, Tengen Murakami, Masaki Sakaguchi, Norimasa Shiomi, and Manabu Takao. "Design method for a bidirectional ducted tidal turbine based on conventional turbomachinery methods." Advances in Mechanical Engineering 15, no. 6 (2023). http://dx.doi.org/10.1177/16878132231181066.

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Renewable energy sources include solar, wind, hydro, geothermal and biomass. Furthermore, ocean energy is being rapidly harnessed worldwide. In this study, to establish a suitable design method for various bidirectional ducted tidal turbines, instead of using blade element momentum theory and CFD, which have been used previously, the method used for turbomachinery was used for designing the turbines. A bidirectional turbine optimises the equipment design and reduces manufacturing and maintenance costs. Using the turbine power as the design condition, the difference in the tangential velocity b

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