A5064266292- Wind Energy Research and Development
- Fluid Dynamics and Vibration Analysis
- Wind and Air Flow Studies
- Wave and Wind Energy Systems
- Hybrid Renewable Energy Systems
- Offshore Engineering and Technologies
- Aerodynamics and Fluid Dynamics Research
- Spacecraft and Cryogenic Technologies
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Hydraulic and Pneumatic Systems
- Microgrid Control and Optimization
- Wind Turbine Control Systems
- Refrigeration and Air Conditioning Technologies
- Oil and Gas Production Techniques
- Energy Load and Power Forecasting
- Integrated Energy Systems Optimization
- Cavitation Phenomena in Pumps
- Ship Hydrodynamics and Maneuverability
- Maritime Transport Emissions and Efficiency
- Fluid Dynamics and Turbulent Flows
- Aerospace and Aviation Technology
- Turbomachinery Performance and Optimization
- Structural Integrity and Reliability Analysis
- Structural Health Monitoring Techniques
- Color perception and design
University of Malta
2015-2024
Delft University of Technology
2005-2022
Abstract Blade element momentum (BEM) methods are still the most common used for predicting aerodynamic loads during aeroelastic design of wind turbine blades. However, their accuracy is limited by availability reliable aerofoil data. Owing to 3D nature flow over blades, characteristics will vary considerably from 2D characteristics, especially at inboard sections Detailed surface pressure measurements on blade surfaces may be derive more realistic in doing so, knowledge angle attack...
Abstract This paper describes power performance measurements undertaken on a model floating wind turbine installed tension‐leg platform (TLP) in wind/wave generator facility. Initially, the surge of was measured under different rotor and wave conditions. The behaviour depended considerably tip speed ratio frequency amplitude. High‐frequency data sampling techniques were then used to derive instantaneous coefficient directly from measurements, together with velocity system. compared those...
Hull roughness significantly increases ship resistance, power, and fuel consumption. Although it is typically spatially heterogeneous, little research has dealt with heterogeneously distributed on hulls. Therefore, this study investigates the heterogeneous hull effect resistance using Computational Fluid Dynamics (CFD). A series of CFD simulations were conducted KRISO Container Ship (KSC) model to accurately predict resistance. Specifically, StarCCM + software package was adopted develop...
Tip vortex locations have been measured in the wake of a model rotor both axial flow and yaw using quantitative visualization. For each setting, force coefficient has derived, as well, from measurements. The results agree well with those previously published on Delft University Technology rotor. main interest is to determine tip pitch, skew angle, expansion, physically interpret data. also help validate construct models. location data complement existing skewed velocity hot-wire anemometry,...
ABSTRACT An experimental and numerical analysis of radial flows in the near wake a horizontal axis wind turbine is presented for both axial yawed conditions. Blade performance development are affected because velocities. The phenomenon has not been previously detailed, current knowledge limited to mid far regions. stereo particle image velocimetry dataset model experiments controlled conditions (MEXICO) rotor used along with 3D unsteady potential‐flow panel model. latter used, after...
The tip vortex of a wind turbine rotor blade originates as result complex distribution vorticity along the thickness.While evolution was extensively studied previously in other work, mechanism initiation 3D rotating environment is still somewhat obscured due to lack detailed experimental evidence.This paper therefore aims at providing an understanding how formed and what happens just behind trailing edge.Stereo Particle Image Velocimetry (SPIV) used measure flow field 2m diameter, twobladed...
Abstract The tip vortex of a wind turbine rotor blade is the result distribution aerodynamic loads and circulation over tip. current knowledge on generation vorticity in 3D rotating environment still lacks detailed experimental evidence, particularly for yawed flow. aim this paper to investigate how at behaves eventually released wake, both axial 30° flow conditions through combination numerical simulations. Stereo particle image velocimetry used measure field 2m diameter, two‐bladed TU...
Abstract Wind turbine design codes for calculating blade loads are usually based on a element momentum (BEM) approach. Since wind rotors often operate in off‐design conditions, such as yawed flow, several engineering methods have been developed to take into account conditions. An essential feature of BEM code is the coupling local with an external (induced) velocity field determined theory through angle attack. Local follow directly from pressure measurements performed National Renewable...
This study compares the time-varying rotor thrust and shaft power characteristics of a yawed floating offshore wind turbine (FOWT) predicted by three different open-source aerodynamic models. These models involve blade-element-momentum (BEM) general dynamic wake (GDW) methods implemented in design code fast developed NREL, higher fidelity free-wake vortex model (FWVM) that is capable modeling unsteady skewed helical development rotor. The based on NREL 5 MW baseline installed MIT tension-leg...
Following the International Maritime Organization’s goal to reduce greenhouse gas emissions, interest in application of wind-assisted ship propulsion (WASP) maritime transportation is on rise. Although a variety WASP systems exist, shipping still limited, especially case kite sails. This paper presents numerical model carry out theoretical assessment influence planform area and wind speed aerodynamic performance sail providing propulsive assistance 75 m long having Series 60 hull. A static...
Abstract An improved physical understanding of the rotor aerodynamics a horizontal axis wind turbine (HAWT) is required to reduce uncertainties associated with today's design codes. Wind tunnel experiments contribute increased knowledge and enable validation construction models. The present study focuses on near‐wake model HAWT in both axial yawed flow conditions. At three downstream planes parallel plane, single‐sensor hot‐film traverses are made. phase‐locked unsteady three‐dimensional...