Numerical Simulation of the Flow around a Straight Blade Darrieus Water Turbine
In this study, three-dimensional transient numerical simulations of the flow around a cross flow water turbine of the type H-Darrieus are performed. The hydrodynamic characteristics and performance of the turbine are investigated by means of a time-accurate unsteady Reynolds-averaged Navierͨ...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-03-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/13/5/1137 |
| _version_ | 1798003448135811072 |
|---|---|
| author | Santiago Laín Pablo Cortés Omar Darío López |
| author_facet | Santiago Laín Pablo Cortés Omar Darío López |
| author_sort | Santiago Laín |
| collection | DOAJ |
| description | In this study, three-dimensional transient numerical simulations of the flow around a cross flow water turbine of the type H-Darrieus are performed. The hydrodynamic characteristics and performance of the turbine are investigated by means of a time-accurate unsteady Reynolds-averaged Navier−Stokes (URANS) commercial solver (ANSYS-Fluent v. 19) where the time dependent rotor-stator interaction is described by the sliding mesh approach. The transition shear stress transport turbulence model has been employed to represent the turbulent dynamics of the underlying flow. Computations are validated versus previous experimental work in terms of the turbine efficiency curve showing good agreement between numerical and experimental values. The behavior of the power and force coefficients as a function of turbine angular speed is analyzed. Moreover, visualizations and analyses of the instantaneous vorticity iso-surfaces developing at different blade rotational velocities are presented including a few movies as additional material. Finally, the fluid variables fields are averaged along a turbine revolution and are compared with the steady predictions of simplified steady approaches based on the blade element momentum theory and the double multiple streamtube method (BEM-DMS). |
| first_indexed | 2024-04-11T12:07:50Z |
| format | Article |
| id | doaj.art-d21509ae87c64c67b5946b8ef9bf8059 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T12:07:50Z |
| publishDate | 2020-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-d21509ae87c64c67b5946b8ef9bf80592022-12-22T04:24:41ZengMDPI AGEnergies1996-10732020-03-01135113710.3390/en13051137en13051137Numerical Simulation of the Flow around a Straight Blade Darrieus Water TurbineSantiago Laín0Pablo Cortés1Omar Darío López2PAI+ Research Group, Energetics and Mechanics Department, Universidad Autónoma de Occidente, Calle 25 No 115-85, Cali 760030, ColombiaComputational Mechanics Research Group Carrera 1Este No 19A-40, Universidad de los Andes, Bogotá 111711, ColombiaComputational Mechanics Research Group Carrera 1Este No 19A-40, Universidad de los Andes, Bogotá 111711, ColombiaIn this study, three-dimensional transient numerical simulations of the flow around a cross flow water turbine of the type H-Darrieus are performed. The hydrodynamic characteristics and performance of the turbine are investigated by means of a time-accurate unsteady Reynolds-averaged Navier−Stokes (URANS) commercial solver (ANSYS-Fluent v. 19) where the time dependent rotor-stator interaction is described by the sliding mesh approach. The transition shear stress transport turbulence model has been employed to represent the turbulent dynamics of the underlying flow. Computations are validated versus previous experimental work in terms of the turbine efficiency curve showing good agreement between numerical and experimental values. The behavior of the power and force coefficients as a function of turbine angular speed is analyzed. Moreover, visualizations and analyses of the instantaneous vorticity iso-surfaces developing at different blade rotational velocities are presented including a few movies as additional material. Finally, the fluid variables fields are averaged along a turbine revolution and are compared with the steady predictions of simplified steady approaches based on the blade element momentum theory and the double multiple streamtube method (BEM-DMS).https://www.mdpi.com/1996-1073/13/5/1137cfd numerical simulationunsteady analysiscross flow water turbinetransition turbulence model |
| spellingShingle | Santiago Laín Pablo Cortés Omar Darío López Numerical Simulation of the Flow around a Straight Blade Darrieus Water Turbine Energies cfd numerical simulation unsteady analysis cross flow water turbine transition turbulence model |
| title | Numerical Simulation of the Flow around a Straight Blade Darrieus Water Turbine |
| title_full | Numerical Simulation of the Flow around a Straight Blade Darrieus Water Turbine |
| title_fullStr | Numerical Simulation of the Flow around a Straight Blade Darrieus Water Turbine |
| title_full_unstemmed | Numerical Simulation of the Flow around a Straight Blade Darrieus Water Turbine |
| title_short | Numerical Simulation of the Flow around a Straight Blade Darrieus Water Turbine |
| title_sort | numerical simulation of the flow around a straight blade darrieus water turbine |
| topic | cfd numerical simulation unsteady analysis cross flow water turbine transition turbulence model |
| url | https://www.mdpi.com/1996-1073/13/5/1137 |
| work_keys_str_mv | AT santiagolain numericalsimulationoftheflowaroundastraightbladedarrieuswaterturbine AT pablocortes numericalsimulationoftheflowaroundastraightbladedarrieuswaterturbine AT omardariolopez numericalsimulationoftheflowaroundastraightbladedarrieuswaterturbine |