Computational study of transient flow around Darrieus type cross flow water turbines

This study presents full transient numerical simulations of a cross-flow vertical-axis marine current turbine (straight-bladed Darrieus type) with particular emphasis on the analysis of hydrodynamic characteristics. Turbine design and performance are studied using a time-accurate Reynolds-averaged Navier–Stokes commercial solver. A physical transient rotor-stator model with a sliding mesh technique is used to capture changes in flow field at a particular time step. A shear stress transport k-ω turbulence model was initially employed to model turbulent features of the flow. Two dimensional simulations are used to parametrically study the influence of selected geometrical parameters of the airfoil (camber, thickness, and symmetry-asymmetry) on the performance prediction (torque and force coefficients) of the turbine. As a result, torque increases with blade thickness-to-chord ratio up to 15% and camber reduces the average load in the turbine shaft. Additionally, the influence of blockage ratio, profile trailing edge geometry, and selected turbulence models on the turbine performance prediction is investigated

• Autores: Laín Beatove, Santiago; Quintero Arboleda, Brian; López Mejía, Omar Darío; Meneses, Diana
• Tipo de recurso: Article of journal
• Fecha de publicación: 2016
• Institución: Universidad Autónoma de Occidente
• Repositorio: RED: Repositorio Educativo Digital UAO
• Idioma: eng
• OAI Identifier: oai:red.uao.edu.co:10614/11062
• Acceso en línea: http://hdl.handle.net/10614/11062; https://aip.scitation.org/doi/abs/10.1063/1.4940023; https://doi.org/10.1063/1.4940023
• Palabra clave: Dinámica de fluidos computacional; Aerodinámica; Hidroturbinas; Turbinas de viento; Simulaciones de turbulencia; Dinámica de fluidos; Ecuaciones de Navier-stokes; Arrastre (Aerodinámica); Fluid dynamics; Navier-stokes equations; Drag (aerodynamics); Turbinas hidráulicas; Números de Reynolds; Hydraulic turbines; Reynolds number; Cross flow water turbine; Unsteady CFD flow simulation; Turbulence model
• Rights: restrictedAccess
• License: Derechos Reservados - Universidad Autónoma de Occidente