A numerical H Darrieus hydrokinetic turbine performance assessment with the application of openings in blade geometry DOI Creative Commons
Miguel Ángel Marigil Gómez, Angie Guevara Muñoz, Diego Hincapié

et al.

International Journal of Renewable Energy Development, Journal Year: 2024, Volume and Issue: 14(1), P. 1 - 9

Published: Nov. 7, 2024

This study explores the impact of various geometric modifications, including leading-edge openings, trailing- edge and circular on performance H Darrieus hydrokinetic turbine. These modifications involved removal material from a symmetrical NACA0018 airfoil along its surface. The leading trailing openings extended lower to upper surface blade, while opening was applied exclusively Using commercial software ANSYS® V22.2, turbine designed, discretized, analyzed through computational fluid dynamics employing Realizable K-e turbulence model. primary output variable measured torque, which power coefficient for each design modification derived, allowing calculation efficiency in scenario. Notably, configuration featuring achieved highest at 51.88% Tip Speed Ratio (TSR) 2.0, significant improvement over standard case had an 45.16%. In contrast, trailing-edge resulted reduced efficiencies 44.54% 31.19%, respectively. enhanced with is attributed increased pressure difference generated between surfaces surpassing design.

Language: Английский

A novel liquid–gas–solid computational fluid dynamics-discrete element method-volume of fluid coupling method with compressible fluid phases DOI

Jin‐Hui He,

Mingguang Li, Jin-Jian Chen

et al.

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(4)

Published: April 1, 2025

Traditional computational fluid dynamics (CFD)-discrete element method (DEM)-volume of (VOF) three-phase coupling methods may produce inaccurate results in certain scenarios due to the assumption incompressible liquid and gas phases. In this study, a novel CFD-DEM-VOF is proposed, which integrates unified equation state account for compressibility both The α transport derived, fractional step proposed solving equation. Additionally, continuity incorporating coefficients derived used influence during pressure correction. algorithm validated through simulations three classic cases: single particle entering water from air, dam break, entry block. Moreover, unsaturated soil loading problems are investigated using method. indicate that liquid–gas interface begins rise only when deep soil, saturated with liquid, experiences significant disturbance. A comparison excess pore movement velocities particles two monitoring mesh layers below initial level reflects spatial response patterns under external loading. Finally, coefficient discussed.

Language: Английский

Citations

0
Investigation on the responses of geotechnical materials to unloading and seepage based on the CFD-DEM coupling method DOI

Jin‐Hui He,

Mingguang Li, Xiao Xiao

et al.

Computers and Geotechnics, Journal Year: 2024, Volume and Issue: 175, P. 106709 - 106709

Published: Sept. 2, 2024

Language: Английский

Citations

1
A discrete element solution method embedded within a Neural Network DOI Creative Commons
Sadjad Naderi, Boyang Chen,

Tongan Yang

et al.

Powder Technology, Journal Year: 2024, Volume and Issue: unknown, P. 120258 - 120258

Published: Sept. 1, 2024

Language: Английский

Citations

1
A numerical H Darrieus hydrokinetic turbine performance assessment with the application of openings in blade geometry DOI Creative Commons
Miguel Ángel Marigil Gómez, Angie Guevara Muñoz, Diego Hincapié

et al.

International Journal of Renewable Energy Development, Journal Year: 2024, Volume and Issue: 14(1), P. 1 - 9

Published: Nov. 7, 2024

This study explores the impact of various geometric modifications, including leading-edge openings, trailing- edge and circular on performance H Darrieus hydrokinetic turbine. These modifications involved removal material from a symmetrical NACA0018 airfoil along its surface. The leading trailing openings extended lower to upper surface blade, while opening was applied exclusively Using commercial software ANSYS® V22.2, turbine designed, discretized, analyzed through computational fluid dynamics employing Realizable K-e turbulence model. primary output variable measured torque, which power coefficient for each design modification derived, allowing calculation efficiency in scenario. Notably, configuration featuring achieved highest at 51.88% Tip Speed Ratio (TSR) 2.0, significant improvement over standard case had an 45.16%. In contrast, trailing-edge resulted reduced efficiencies 44.54% 31.19%, respectively. enhanced with is attributed increased pressure difference generated between surfaces surpassing design.

Language: Английский

Citations

0