A5004728119- Wind Energy Research and Development
- Fluid Dynamics and Vibration Analysis
- Wind and Air Flow Studies
- Aerodynamics and Fluid Dynamics Research
- Fluid Dynamics and Turbulent Flows
- Computational Fluid Dynamics and Aerodynamics
- Icing and De-icing Technologies
- Vibration and Dynamic Analysis
- Wave and Wind Energy Systems
- Biomimetic flight and propulsion mechanisms
- Wind Turbine Control Systems
- Plasma and Flow Control in Aerodynamics
- Lattice Boltzmann Simulation Studies
- Aerodynamics and Acoustics in Jet Flows
- Structural Health Monitoring Techniques
- Aerospace Engineering and Energy Systems
- Turbomachinery Performance and Optimization
- Energy Load and Power Forecasting
- Fluid Dynamics Simulations and Interactions
- Magnetic Bearings and Levitation Dynamics
- Aeroelasticity and Vibration Control
- Soil Mechanics and Vehicle Dynamics
- Fluid dynamics and aerodynamics studies
- Cavitation Phenomena in Pumps
- Aerospace and Aviation Technology
Delft University of Technology
2016-2025
INESC TEC
2024
Universidade do Porto
2024
Universidade Federal do Rio Grande do Sul
2022
European Academy of Technology and Innovation Assessment
2022
WindEurope
2022
Wind Power Engineering (Japan)
2014
The aerodynamic behavior of a vertical axis wind turbine (VAWT) is analyzed by means 2D particle image velocimetry (PIV), focusing on the development dynamic stall at different tip speed ratios. VAWT has an unsteady due to variation with azimuth angle θ blade’s sections’ attack, perceived velocity and Reynolds number. phenomenon then inherent effect operation low ratios, impacting both loads power. present work driven need understand this phenomenon, visualizing quantifying it, create...
Abstract. The European Academy of Wind Energy (eawe), representing universities and institutes with a significant wind energy programme in 14 countries, has discussed the long-term research challenges energy. In contrast to agendas addressing short- medium-term activities, this eawe document takes longer-term perspective, scientific knowledge base that is required develop beyond applications today tomorrow. other words, agenda driven by problems curiosity, basic fundamental 11 areas, ranging...
The implementation of wind energy conversion systems in the built environment renewed interest and research on Vertical Axis Wind Turbines (VAWT), which this application present several advantages over Horizontal (HAWT). VAWT has an inherent unsteady aerodynamic behavior due to variation angle attack with rotation, perceived velocity consequentially Reynolds number. phenomenon dynamic stall is then intrinsic effect operation a Turbine at low tip speed ratios, having significant impact both...
Kinetic-energy transport and turbulence production within the shear layer of a horizontal-axis wind-turbine wake are investigated with respect to their influence on tip-vortex pairwise instability, so-called leapfrogging instability. The study quantifies effect near-wake instability breakdown process mean-flow kinetic-energy far wind turbine, in turn affecting re-energising process. Experiments conducted an open-jet tunnel model 60 cm diameter at diameter-based Reynolds number range...
Abstract Passive vane–type vortex generators (VGs) are commonly used on wind turbine blades to mitigate the effects of flow separation. However, significant uncertainty surrounds VG design guidelines. Understanding influence parameters airfoil performance requires a systematic approach targeting energy‐specific airfoils. Thus, 30%‐thick DU97‐W‐300 was equipped with numerous designs, and its evaluated in Delft University Low Turbulence Wind Tunnel at chord‐based Reynolds number 2×10 6 ....
Multi-megawatt Vertical Axis Wind Turbines (VAWTs) are experiencing an increased interest for floating offshore applications. However, VAWT development is hindered by the lack of fast, accurate and validated simulation models. This work compares six different numerical models VAWTS: a multiple streamtube model, double-multiple actuator cylinder 2D potential flow panel 3D unsteady lifting line conformal mapping vortex model. The comparison covers rotor configurations with two NACA0015 blades,...
Vortex generators (VGs) have proven their capabilities in wind turbine applications to delay stall steady flow conditions. However, behaviour unsteady conditions is insufficiently understood. This paper presents an experimental study that demonstrates the effect of VGs flow, including controlling and suppressing dynamic process. An airfoil, particularly designed for a vertical-axis turbine, has been tested tunnel caused by sinusoidal pitching motion. The pressure distributions, lift, drag...
Abstract. This study investigates the potential of regenerative wind farming using multirotor systems equipped with paired multirotor-sized wings, termed atmospheric boundary layer control (ABL-control) devices, positioned in near-wake region multirotor. These ABL-control devices generate vortical flow structures that enhance vertical momentum flux from above farm into flow, thereby accelerating wake recovery process. work presents numerical assessments a single system various...
ABSTRACT The airfoil DU91‐W2‐150 was investigated in the Low Speed Turbulence Tunnel at Delft University of Technology to study unsteady aerodynamics. This experimental tested under a wide range angles attack (AoA) from 0° 310° three Reynolds numbers () . Pressure on surface measured and particle image velocimetry (PIV) measurements were conducted capture flow field wake. By examining force coefficient comparing wake contours, it shows that an upwind concave provides higher load compared...
Abstract The implementation of wind energy conversion systems in the built environment has renewed interest and research on Vertical Axis Wind Turbines (VAWTs). VAWT an inherent unsteady aerodynamic behavior due to variation angle attack perceived velocity with azimuth angle. phenomenon dynamic stall is then intrinsic effect operation at low tip speed ratios, impacting both loads power. complexity problem need for new design approaches VAWTs have driven authors focus this CFD modeling on:...
Abstract An expression for the aerodynamic optimization of aerofoils 2D lift driven vertical‐axis wind turbines is derived as a function slope and drag. As proportional to aerofoil thickness, optimum found in thick aerofoils, which are also structurally advantageous. Using genetic algorithm, objective used generate whose performance turbine calculated using potential flow solution induction field polars with XFOIL. The results demonstrate power structural gains. This approach can lead...
In order to assess the dynamic performance of a submerged floating tunnel (SFT) subject flow-induced vibration (FIV) conditions in practical engineering application, one-way fluid–structure interaction (FSI) model consisting multi-scale hydrodynamic solvers combined with finite element method (FEM) is established. A typical long, large aspect ratio SFT modeled by coupling tube, joint, and mooring components. The simulated time domain under currents, waves, extreme events. FIV SFTs different...
Abstract. While modern wind turbines have become by far the largest rotating machines on Earth with further upscaling planned for future, a renewed interest in small (SWTs) is fostering energy transition and smart grid development. Small traditionally not received same level of aerodynamic refinement as their larger counterparts, resulting lower efficiency, capacity factors, therefore higher cost energy. In an effort to reduce this gap, research programs are developing worldwide. With...
Abstract Wind farm control can play a key role in reducing the negative impact of wakes on wind turbine power production. The helix approach is recent innovation field control, which employs individual blade pitch to induce helical velocity profile wake. This forced meandering wake has turned out be very effective for recovery wake, increasing output downstream turbines by significant amount. paper presents tunnel study with two scaled models upstream operated approach. We used tomographic...
Abstract. This article presents a comparison study of different aerodynamic models for an X-shaped vertical-axis wind turbine and offers insight into the 3D aerodynamics this rotor at fixed pitch offsets. The compares six numerical models: double-multiple streamtube (DMS) model, 2D actuator cylinder (2DAC) inviscid free vortex wake model (from CACTUS), with turbulent vorticity QBlade), blade-resolved unsteady Reynolds-averaged Navier–Stokes (URANS) lattice Boltzmann method PowerFLOW). All...
Abstract This study explores the performance and near-wake dynamics of a VAWT-based Multi-Rotor System in both its original configuration presence external lift-generating devices, specifically employed for wake control operations. The scaled MRS was measured wind tunnel using Particle Tracking Velocimetry. Lift-generating including 3-element cascading wing on top single-element middle MRS, were used to enhance deflection. Measurements revealed notable differences between configurations with...
Abstract. This study presents results from a wind tunnel experiment on three-bladed horizontal axis turbine. The model turbine is scaled-down version of the IEA 15 MW reference turbine, preserving non-dimensional thrust distribution along blade. Flow fields were captured around blade at multiple radial locations using particle image velocimetry. In addition to these flow fields, this comprehensive dataset contains spanwise distributions bound circulation, inflow conditions and forces derived...
Abstract In contemporary wind farm design, the primary focus has traditionally been on reducing wake interference to optimize energy capture from horizontal flows. However, with scaling up of farms, their interaction Atmospheric Boundary Layer (ABL) evolves, making vertical entrainment main mechanism for exchange momentum and energy. This study introduces a methodical approach augment efficiency large-scale offshore farms by actively controlling this within ABL. The strategy involves precise...
Abstract This study investigates the near-wake aerodynamics of actuator disks (multirotor devices) paired with lift-generating devices (rotor-sized wings, dubbed ABL-control devices). These rotor-sized wings generate vortical structures that enhance vertical momentum flux from above atmospheric boundary layer (ABL) into wind farm, aiding wake recovery. Using three-dimensional surface models based on Momentum theory, employs steady-state Reynolds-averaged Navier–Stokes computations in...
Abstract In the present work, near‐wake generated for a vertical axis wind turbine (VAWT) was simulated using an actuator line model (ALM) in order to validate and evaluate its accuracy. The sensitivity of variation spatial temporal discretization studied showed bigger response mesh size as compared with discretization. large eddy simulation (LES) approach used predict turbulence effects. performance Smagorinsky, dynamic k‐equation, Lagrangian models tested, showing very little relevant...