- document
-
Jamieson, P. (author), Ferreira, Carlos (author), Dalhoff, P. (author), Störtenbecker, S. (author), Collu, M. (author), Salo, E. (author), McMillan, D. (author), McMorland, J. (author), Morgan, L. (author), Buck, A. (author)The upscaling of wind turbines results in fewer units per installed MW reducing infrastructure and maintenance costs of offshore wind farms. Multi rotor systems (MRS), comprising many wind turbine rotors on a single support structure, are potentially a means to maximize the upscaling benefit in achieving larger unit capacities than is...journal article 2022
- document
-
Abdelfattah, Ibrahim (author), Ferreira, Francisca (author), Saleh, M. (author), Reis, Paulo N.B. (author), Teixeira De Freitas, S. (author)Three-point bending analysis, experimental and numerical, is conducted for three different sizes, 30*30 mm, 40*40 mm and 60*60 mm, of one-sided square cross-ply TEXIPREG HS 160 RM carbon-fiber-reinforced polymer (CFRP) patches as well as intact and notched specimens. The tests are carried out with the aim to study the influence of the patch’s...journal article 2022
- document
-
De Tavernier, D. (author), Ferreira, Carlos (author), Goude, Anders (author)This chapter highlights the main aerodynamic phenomena and challenges of vertical-axis wind turbines. First, an introduction is provided on the VAWT history and (dis-)advantages. The basics of VAWT aerodynamics and the various rotor simplifications/representations are presented. Further, the state-of-the art aerodynamic modeling techniques,...book chapter 2022
- document
-
Ferreira, Joao Dinis (author), Falcao, Gabriel (author), Gomez-Luna, Juan (author), Alser, Mohammed (author), Orosa, Lois (author), Sadrosadati, Mohammad (author), Kim, Jeremie S. (author), Oliveira, Geraldo F. (author), Shahroodi, Taha (author)Data movement between the main memory and the processor is a key contributor to execution time and energy consumption in memory-intensive applications. This data movement bottleneck can be alleviated using Processing-in-Memory (PiM). One category of PiM is Processing-using-Memory (PuM), in which computation takes place inside the memory array...conference paper 2022
- document
-
Deng, Z. (author), Ferreira, Ana Lucia Morgado (author), Spanjers, H. (author), van Lier, J.B. (author)Abstract: Protein-rich agro-industrial waste streams are high in organic load and represent a major environmental problem. Anaerobic digestion is an established technology to treat these streams; however, retardation of protein degradation is frequently observed when carbohydrates are present. This study investigated the mechanism of the...journal article 2022
- document
-
van der Hoek, D.C. (author), Frederik, J.A. (author), Huang, M. (author), Scarano, F. (author), Ferreira, Carlos (author), van Wingerden, J.W. (author)Dynamic induction control (DIC) has proven to be an effective method of increasing the power output for a wind farm in both simulation studies and wind tunnel experiments. By pitching the blades of a wind turbine periodically, the recovery of the low-velocity wake is accelerated, thereby increasing the energy available to downstream turbines....journal article 2022
- document
-
LeBlanc, B.P. (author), Ferreira, Carlos (author)The blade pitch of a Vertical Axis Wind Turbine can have a profound impact on the aerodynamic loading experienced by the turbine. This in turn impacts the structural loads and the performance of the machine. In order to characterize the effects of changing pitch, studies are conducted with fixed pitch offsets from a neutral pitch position in...journal article 2022
- document
-
Vortex-model-based Multi-objective Optimization of Winglets for Wind Turbines using Machine LearningLeenders, N.A. (author), Yu, W. (author), Gaunaa, Mac (author), Caboni, Marco (author), Ferreira, Carlos (author)Different Design Driving Load constraints (DDLs), are explored in this work to determine under which constraints and conditions a winglet can have an added value to the wind turbine blade design. Multi-objective Bayesian optimization is used to maximize the rotor's power production while minimizing the flapwise DDLs. Surrogate models, created...journal article 2022
- document
-
Fritz, E.K. (author), Ferreira, Carlos (author), Boorsma, Koen (author)<br/><br/>This article proposes an efficient correction model that enables the extension of the blade element momentum method (BEM) for swept blades. Standard BEM algorithms, assuming a straight blade in the rotor plane, cannot account for the changes in the induction system introduced by blade sweep. The proposed extension corrects the axial...journal article 2022
- document
-
Ferreira, Bernardo P. (author), Andrade Pires, F. M. (author), Bessa, M.A. (author)This article introduces adaptivity in Clustering-based Reduced Order Models (ACROMs). The strategy is demonstrated for a particular CROM called Self-Consistent Clustering Analysis (SCA), extending it into the Adaptive Self-Consistent Clustering Analysis (ASCA) method. This is shown to improve predictions of Representative Volume Elements ...journal article 2022
- document
-
Ferreira, M. (author), Coelho, C. (author), Silva, P.A. (author)Barra-Vagueira coastal stretch, located downdrift of the Aveiro Harbour, NW coast of Portugal, is anerosion hotspot, presenting,in the last 50 years,erosion rates that reached 8m/year(Santoset al.,2014).Thiscoast is subject to a very energetic wave climate, inducing a net littoral transport from North to South that reaches valuesaround 106m3...conference paper 2021
- document
-
Ferreira, A.M. (author), Garzon, J.L. (author), Ferreira, Ó. (author), Fortes, C.J.E.M. (author), Reis, M.T. (author)Low-lying coastal areas can be very vulnerable to extreme storms inducing overtopping and flood events with severe socioeconomic consequences. Also, the associated risk is expected to increase due to sea level rise and coastal population growth. Under this threat, early warning systems (EWS) are a crucial tool for coastal planning and management...conference paper 2021
- document
-
Phung, Quoc Tri (author), Seetharam, Suresh .C. (author), Ferreira, Eduardo (author), Govaerts, Joan (author), Hendrix, Katrien (author), Valcke, Elie (author)This paper presents an extension of an existing phenomenological model for predicting the evolution of hydration heat of a cemented waste form. The cemented waste form is essentially a mixture of blended cement and homogeneous low- and intermediate-level liquid (simulant) radioactive waste (sludge). The motivation stems from the fact that the...conference paper 2021
- document
-
LeBlanc, B.P. (author), Ferreira, Carlos (author)This paper presents the flow fields and aerodynamic loading of a two bladed H-type vertical axis wind turbine with active variable pitch for load and circulation control. Particle Image Velocimetry is used to capture flow fields at six azimuthal positions of the blades during operation, three upwind and three downwind. Flow phenomena such as...journal article 2021
- document
-
Ferreira, Pedro L. (author), Santos, Francisco C. (author), Gonçalves Melo Pequito, S.D. (author)What humans do when exposed to uncertainty, incomplete information, and a dynamic environment influenced by other agents remains an open scientific challenge with important implications in both science and engineering applications. In these contexts, humans handle social situations by employing elaborate cognitive mechanisms such as theory of...journal article 2021
- document
-
De Tavernier, D. (author), Ferreira, Carlos (author), Viré, A.C. (author), LeBlanc, B.P. (author), Bernardy, S. (author)Vortex generators (VGs) have proven their capabilities in wind turbine applications to delay stall in steady flow conditions. However, their behaviour in unsteady conditions is insufficiently understood. This paper presents an experimental study that demonstrates the effect of VGs in unsteady flow, including controlling and suppressing the...journal article 2021
- document
-
van Kessel, C.L. (author), Bauer, P. (author), Ferreira, Jan Abraham (author)Dielectric elastomer transducers (DETs) are commonly modeled by lumped-element models (LEMs), however such models do not capture the cutoff behavior that manifests at relatively low frequencies due to the high resistivity of the stretchable electrodes. Moreover, the contribution of the electrodes into the lumped series resistance is not...journal article 2021
- document
-
Ferreira, P. (author), Rigotti Manesco, A.L. (author), Dorini, T. T. (author), Correa, L. E. (author), Weber, G. (author), Machado, A. J.S. (author), Eleno, L. T.F. (author)In the present work, we investigate the electronic and elastic properties in equilibrium and under strain of the type-II Dirac semimetal NiTe2 using density functional theory. Our results demonstrate the tunability of Dirac nodes' energy and momentum with strain and that it is possible to bring them closer to the Fermi level, while other...journal article 2021
- document
-
Goyal, J. (author), Sinnige, T. (author), Avallone, F. (author), Ferreira, Carlos (author)Regenerative propellers offer many potential benefits such as improved maneuverability, reduced landing run, and decreased community noise, besides the potential to reduce energy consumption by recovering energy during descent and landing. Since the blade loading in regenerative mode will be opposite to that in the conventional propulsive mode,...conference paper 2021
- document
-
Melani, P. F. (author), Balduzzi, F. (author), Brandetti, L. (author), Ferreira, Carlos (author), Bianchini, A. (author)Simulation methods ensuring a level of fidelity higher than that of the ubiquitous Blade Element Momentum theory are increasingly applied to VAWTs, ranging from Lifting-Line methods, to Actuator Line or Computational Fluid Dynamics (CFD). The inherent complexity of these machines, characterised by a continuous variation of the angle of attack...journal article 2020