A5026274703- Wind and Air Flow Studies
- Fluid Dynamics and Vibration Analysis
- Wind Energy Research and Development
- Aerodynamics and Fluid Dynamics Research
- Structural Engineering and Vibration Analysis
- Vibration and Dynamic Analysis
- Structural Health Monitoring Techniques
- Wave and Wind Energy Systems
- Fluid Dynamics and Turbulent Flows
- Railway Engineering and Dynamics
- Ship Hydrodynamics and Maneuverability
- Hydraulic and Pneumatic Systems
- Vibration Control and Rheological Fluids
- Seismic and Structural Analysis of Tall Buildings
- Coastal and Marine Dynamics
- Seismic Performance and Analysis
- Meteorological Phenomena and Simulations
- Aeolian processes and effects
- Structural Analysis of Composite Materials
- Fluid Dynamics Simulations and Interactions
- Probabilistic and Robust Engineering Design
- Masonry and Concrete Structural Analysis
- Hydraulic flow and structures
- Power Line Inspection Robots
- Remote Sensing and LiDAR Applications
Politecnico di Milano
2016-2025
Abstract. This paper provides a summary of the work done within Phase III Offshore Code Comparison Collaboration, Continued, with Correlation and unCertainty (OC6) project, under International Energy Agency Wind Technology Collaboration Programme Task 30. phase focused on validating aerodynamic loading wind turbine rotor undergoing large motion caused by floating support structure. Numerical models Technical University Denmark 10 MW reference were validated using measurement data from 1:75...
This study illustrates the aerodynamic and mechatronic design of a 1/75 scaled model DTU 10 MW wind turbine to perform tunnel tests in floating offshore configuration. Due strong discrepancy Reynolds number between full scale (up 150), dedicated low‐Reynolds airfoil (SD7032) was chosen for blades, final shape defined based on optimisation algorithm which had as target matching thrust force first flap‐wise bending frequency, it is thoroughly explained study. Furthermore, reported terms...
Abstract. Floating offshore wind turbines are subjected to large motions due the additional degrees of freedom floating foundation. The turbine rotor often operates in highly dynamic inflow conditions, and this has a significant effect on overall aerodynamic response wake. Experiments needed get deeper understanding unsteady aerodynamics hence leverage knowledge develop better models produce data for validation calibration existing numerical tools. In context, paper presents tunnel...
Abstract. The disruptive potential of floating wind turbines has attracted the interest both industry and scientific community. Lacking a rigid foundation, such machines are subject to large displacements whose impact on aerodynamic performance is not yet fully explored. In this work, unsteady response harmonic-surge motion scaled version DTU 10 MW turbine investigated in detail. imposed have been chosen representative typical platform motion. results different numerical models validated...
This paper presents the first set of results steady and unsteady wind tunnel tests, performed at Politecnico di Milano tunnel, on a 1/75 rigid scale model DTU 10 MW turbine, within LIFES50+ project. The aim these tests is validation open source code AeroDyn developed NREL. Numerical experimental are compared in terms thrust torque coefficients, showing good agreement, as well for measurements gathered with 2 degree-of-freedom test rig, capable imposing displacements base model, providing...
This paper reports the results of a wake measurement campaign carried out at Politecnico di Milano wind tunnel to support current studies authors about unsteady aerodynamics floating offshore turbines (FOWT) as well evaluating experimental evidence for farm applications FOWT. The turbine scale model adopted these tests is 1/75 DTU 10 MW developed LIFES50+ project. In this study, imposed surge motions, different frequencies and amplitudes, were provided base turbine’s tower, investigate...
The fluid-dynamic simulation of wind turbine aerodynamics is typically tackled by applying multi-fidelity computational tools. In this context, the so-called actuator line model combines a low-fidelity treatment rotor with high-fidelity resolution wake. paper, novel formulation proposes vortex-based method to sample flow around rigorously assign forces imparted blades. This new technique implemented into an in-house code developed within OpenFOAM environment, and it validated against...
Abstract This paper presents wind‐induced response reduction in a very slender building using magneto‐rheological (MR) dampers with lever mechanism. The case study of an engineered design that is instructive. shows shear and flexural tall buildings present two different cases for vibration suppression. MR are implemented optimally the to reduce its lateral directions both structural safety occupant comfort concerns. A proposed mechanism used improve their performance. how can enable...
This paper illustrates the mechatronic design of wind tunnel scale model DTU 10MW reference turbine, for LIFES50+ H2020 European project. was designed with final goal controlling angle attack each blade by means miniaturized servomotors, implementing advanced individual pitch control (IPC) laws on a Floating Offshore Wind Turbine (FOWT) 1/75 model. Many constraints were to be respected: among others, rotor-nacelle overall mass due aero-elastic scaling, limited space nacelle, where put three...
Abstract. This study reports the results of second round analyses Offshore Code Comparison, Collaboration, Continued, with Correlation and unCertainty (OC6) project Phase III. While first investigated rotor aerodynamic loading, here, focus is given to wake behavior a floating wind turbine under large motion. Wind tunnel experimental data from UNsteady Aerodynamics for FLOating (UNAFLOW) are compared simulations provided by participants methods codes different levels fidelity. The effect...
Abstract. Wind turbine wakes can be treated as a complex system of helical vortices. When this destabilizes, the wake recovers its velocity deficit through mixing and entertainment energy from surrounding flow. How fast effectively that happens depends on inflow characteristics also influenced by how turbines are operated. Dynamic induction control techniques such helix affect onset instability transition near to far wake, but exact mechanisms still unclear. Its potential in wind farm...
This work presents a selected set of results from an extensive experimental campaign aimed at characterizing the wake aerodynamics floating offshore wind turbines (FOWT) in dynamic conditions. The was carried out Politecnico di Milano 14m x 4m atmospheric boundary layer test section, under UNAFLOW project (UNsteady Aerodynamics FLoating Wind turbines). Wake measurements were either through hot-wire anemometers with traversing system as well Particle Image Velocimetry (PIV) technique. A 1/75...
UNAFLOW (UNsteady Aerodynamics for Floating Wind) is a joint EU-IRPWIND founded experiment on wind turbine rotor unsteady aerodynamics. It brings together four different academic contributors: Energy research Centre of the Netherlands (ECN), DTU Wind Energy, University Stuttgart (USTUTT) and Politecnico di Milano (PoliMi) sharing knowledge both in numerical modelling experimental tests design, allowing direct comparison.
Nine research teams organized a round-robin measurement campaign of the wake two porous discs in homogeneous and "low-turbulent' flow. Mean streamwise velocity turbulence intensity profiles at four diameters downstream were measured compared through such metrics as maximum deficit, intensity, width thrust coefficient. The dependence these on inflow conditions (freestream Reynolds number based disc diameter) is discussed.