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Effects of Reynolds Number on the Energy Conversion and Near-Wake Dynamics of a High Solidity Vertical-Axis Cross-Flow Turbine Open
Experiments were performed with a large laboratory-scale high solidity cross-flow turbine to investigate Reynolds number effects on performance and wake characteristics and to establish scale thresholds for physical and numerical modeling …
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Experimental parameter study for passive vortex generators on a 30% thick airfoil Open
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 the influence of VG parameters on…
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Bioinspired Trailing-Edge Noise Control Open
Strategies for trailing edge noise control have been inspired by the downy canopy that covers the surface of exposed flight feathers of many owl species. Previous wind tunnel measurements demonstrate that canopies of similar characteristic…
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Aeroservoelastic design definition of a 20 MW common research wind turbine model Open
Wind turbine upscaling is motivated by the fact that larger machines can achieve lower levelized cost of energy. However, there are several fundamental issues with the design of such turbines, and there is little public data available for …
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Competing Three-Dimensional Mechanisms in Compressor Flows Open
Three-dimensional design is central to all modern compressor design systems, but many of these methods still rely on a two-dimensional and sectional view of aerodynamics at their core. This paper argues that this view fundamentally limits …
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Creating Time: Social Collaboration in Music Improvisation Open
Musical collaboration emerges from the complex interaction of environmental and informational constraints, including those of the instruments and the performance context. Music improvisation in particular is more like everyday interaction …
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The compression chord capacity model for the shear design and assessment of reinforced and prestressed concrete beams Open
A simplified mechanical model is presented for the shear strength prediction of reinforced and prestressed concrete members with and without transverse reinforcement, with I, T or rectangular cross‐section. The model, derived with further …
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A Large-Eddy Simulation Study of Vertical Axis Wind Turbine Wakes in the Atmospheric Boundary Layer Open
In a future sustainable energy vision, in which diversified conversion of renewable energies is essential, vertical axis wind turbines (VAWTs) exhibit some potential as a reliable means of wind energy extraction alongside conventional hori…
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Aerodynamic shape optimization and analysis of small wind turbine blades employing the Viterna approach for post-stall region Open
This paper aims to optimize the distribution of chord and twist angle of small wind turbine blade in order to maximize its Annual Energy Production (AEP). A horizontal-axis wind turbine (HAWT) blade is optimized using a calculation code ba…
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Effect of Surface Roughness on Wind Turbine Performance Open
Wind farm operators observe production deficits as machines age. Quantifying deterioration on individual components is difficult, but one potential explanation is accumulation of blade surface roughness. Historically, wind turbine airfoils…
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Text-based LSTM networks for Automatic Music Composition Open
In this paper, we introduce new methods and discuss results of text-based LSTM (Long Short-Term Memory) networks for automatic music composition. The proposed network is designed to learn relationships within text documents that represent …
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Aerodynamic Performance and Wake Development of Airfoils with Serrated Trailing-Edges Open
A comprehensive experimental study has been performed for symmetric NACA 0012 and cambered NACA 65(12)-10 airfoils with a variety of trailing-edge serrations over a wide range of angles of attack. Results are presented for the aerodynamic …
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A fully convolutional deep auditory model for musical chord recognition Open
Chord recognition systems depend on robust feature extraction pipelines.\nWhile these pipelines are traditionally hand-crafted, recent advances in\nend-to-end machine learning have begun to inspire researchers to explore\ndata-driven metho…
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Acoustic scattering by a finite rigid plate with a poroelastic extension Open
The scattering of sound by a finite rigid plate with a finite poroelastic extension interacting with an unsteady acoustic source is investigated to determine the effects of porosity, elasticity and the length of the extension when compared…
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Health Monitoring of Bolted Spherical Joint Connection Based on Active Sensing Technique Using Piezoceramic Transducers Open
Bolted spherical joints are widely used to form space steel structures. The stiffness and load capacity of the structures are affected by the looseness of bolted spherical joint connections in the structures. The looseness of the connectio…
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Mild Dissonance Preferred Over Consonance in Single Chord Perception Open
Previous research on harmony perception has mainly been concerned with horizontal aspects of harmony, turning less attention to how listeners perceive psychoacoustic qualities and emotions in single isolated chords. A recent study found mi…
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Correlating pore size and shape to local disorder in microporous carbon: A combined small angle neutron and X-ray scattering study Open
We present a model free analysis of the structure of a microporous carbon (Kynol fiber cloth) with neutrons (SANS) and X-rays (SAXS). SANS with contrast matching is used to analyze the accessible pores. It is shown that the SAXS- and the S…
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A new characterization of chord-arc domains Open
We show that if \Omega \subset \mathbb{R}^{n+1} , n\geq 1 , is a uniform domain (also known as a 1-sided NTA domain), i.e., a domain which enjoys interior Corkscrew and Harnack Chain conditions, then uniform rectifiability of the boundary …
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Effect of the number of blades and solidity on the performance of a vertical axis wind turbine Open
Two, three and four bladed phgr-shape Vertical Axis Wind Turbines are simulated using a free-wake vortex model. Two versions of the three and four bladed turbines are considered, one having the same chord length as the two-bladed turbine a…
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Structured Training For Large-Vocabulary Chord Recognition. Open
[TODO] Add abstract here.
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Statistical–Empirical Modeling of Airfoil Noise Subjected to Leading-Edge Serrations Open
With the objective of reducing the broadband noise from the interaction of highly turbulent flow and airfoil leading edge, sinusoidal leading-edge serrations were investigated as an effective passive treatment. An extensive aeroacoustic st…
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Annotator subjectivity in harmony annotations of popular music Open
Reference annotation datasets containing harmony annotations are at the core of a wide range of studies in music information retrieval (MIR) and related fields. The majority of these datasets contain single reference annotations describing…
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The pleasantness of sensory dissonance is mediated by musical style and expertise Open
Western musical styles use a large variety of chords and vertical sonorities. Based on objective acoustical properties, chords can be situated on a dissonant-consonant continuum. While this might to some extent converge with the unpleasant…
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Investigating style evolution of Western classical music: A computational approach Open
In musicology, there has been a long debate about a meaningful partitioning and description of music history regarding composition styles. Particularly, concepts of historical periods have been criticized since they cannot account for the …
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Feature Learning for Chord Recognition: The Deep Chroma Extractor Open
We explore frame-level audio feature learning for chord recognition using artificial neural networks. We present the argument that chroma vectors potentially hold enough information to model harmonic content of audio for chord recognition,…
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Experimental investigation of low Reynolds number rotor noise Open
In this paper, an experimental characterisation of low Reynolds number rotors is performed in an anechoic room. Two commercially available two-bladed rotors as well as four three-dimensional (3D)-printed rotors with different numbers of bl…
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On the possibility (or lack thereof) of agreement between experiment and computation of flows over wings at moderate Reynolds number Open
The flight of many birds and bats, and their robotic counterparts, occurs over a range of chord-based Reynolds numbers from 1 × 10 4 to 1.5 × 10 5 . It is precisely over this range where the aerodynamics of simple, rigid, fixed wings becom…
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Analysis of Wind Turbine Using QBlade Software Open
Owing to the fast development in the energy field, the demands are increasing to improve energy efficiency and lifetime of wind turbine. The wind blades are considered as the most important and expensive part in the wind system. Therefore,…
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Fragile, Emergent, and Absent Tonics in Pop and Rock Songs Open
This article explores the sometimes tricky question of tonality in pop and rock songs by positing three tonal scenarios: 1) songs with a fragile tonic, in which the tonic chord is present but its hierarchical status is weakened, either by …
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Sweetness is in the ear of the beholder: chord preference across United Kingdom and Pakistani listeners Open
The majority of research in the field of music perception has been conducted with Western participants, and it has remained unclear which aspects of music perception are culture dependent, and which are universal. The current study compare…