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Showing 1 to 14 of 14 for “"oscillation amplitudes"”.
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Experimental studies of flapping foils for energy extraction
… within a very small parametric region for small oscillation amplitudes while broad regions of appreciable efficiency were found at large oscillation amplitudes. The highest efficiency regions were all found to exhibit the same 2P vortex shedding mode. Further, the similitude between experiments …
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Análise crítica de um modelo fenomenológico de vibrações induzidas por vórtices via análise de sensibilidade global e quantificação de incertezas
… review, CDO is related to the cross-flow oscillation amplitudes. In this study, the approach to this dependence was followed by proposing a discontinuous function for CDO. It is possible to conclude that the analysed model with the proposed CL0, CDO, Ay and Ey is able to represent more …
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Tip clearance and angle of attack effects upon the unsteady response of a vibrating flat plate in crossflow
… Transforms were used to determine pressure oscillation amplitudes and phase lags with respect to the plate motion.
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EEG theta oscillations during sleep deprivation
Brain oscillations of different frequencies characterize the electroencephalogram (EEG) during distinct cognitive and vigilant states. Theta oscillations (4-8 Hz) are unusual because they have been found in the near-opposite conditions of sleepiness and alert cognitive control. Most neuroscience …
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Thermoacoustic Oscillations in Supercritical Fluid Flows
Pressure oscillations in supercritical Jet-A fuel flowing through four parallel, heated tubes connected to common manifolds have been observed in this study. Tests were performed with fuel inlet temperatures ranging from 70F to 700F, and fuel pressures ranging from 360-700 psi. Total fuel flow rate …
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EXPERIMENTAL STUDIES OF QUANTUM OSCILLATIONS IN THE TRANSVERSE MAGNETORESISTANCE OF SINGLE-CRYSTALLINE, ULTRAPURE MAGNESIUM: NON-OHMIC EFFECTS.
… to investigate the low current regime where the oscillations appear to satisfy Ohm's Law. A superconducting chopper amplifier was built which had the sensitivity to measure 10⁻¹¹ volt signals. We present evidence which directly relates this non-ohmic behavior to the long-range influence of a …
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Enhanced Methane Oxidation Catalysis Through Feed Modulation And Oxygen Storage
… of different feed modulation parameters such as oscillation frequency, amplitude, and average lambda. Optimal catalyst performance was determined to occur under slightly rich, near-stoichiometric feed conditions, under high oscillation amplitudes and slow oscillation frequencies. Methane …
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Hydrodynamically Coupled Shape-Morphing Beams Oscillating in a Viscous Fluid
… The beams have two concurrent motions: a rigid oscillation in the vertical direction and a harmonic shape-morphing deformation to an arc of a circle. We perform a comprehensive computational fluid dynamics (CFD) simulation campaign to estimate the hydrodynamic function describing the added mass …
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Development of the plasma thruster particle-in-cell simulator to complement empirical studies of a low-power cusped-field thruster
… previously named "high-current" mode exhibits oscillation amplitudes several factors larger than mean current values, while magnitudes in "low-current" mode are at least a full order smaller. Results from a long-duration test, exceeding 200 hours of high-current mode operation, demonstrate …
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High magnetic field quantum oscillation study of Fermi surfaces in bulk unconventional insulators
… have been found to display insulating quantum oscillations: YbB12 and FeSb2. YbB12 is an f-electron Kondo insulator, much like SmB6, and exhibits similar electrical and thermal properties to SmB6. On the other hand, FeSb2 is a d-electron insulator that had previously attracted attention for its …
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Fundamental studies in hydrogen-rich combustion : instability mechanisms and dynamic mode selection
… the unstable mode is associated with velocity oscillation amplitudes that exceed the mean flow velocity. The apparent similarity between the response curves and flame dynamics in the two combustors indicate that the intrinsic local dynamics--instead of global acoustics--govern the flame …
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Modelling and analysis of vibrations in flexible cylinders subjected to internal multiphase and external single-phase flows.
… of coupled out-of-plane, in-plane and axial oscillations combined with equations involving centrifugal and Coriolis forces for the analysis and prediction of SIV. New dimensionless equations are derived from the dimensional model to analyse key flow features and improve overall understanding …
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Suitability of Quantized DEVS-LIM Methods for Simulation of Power Systems
… left unresolved was the presence of steady-state oscillations, which clearly diminished its computational efficiency and introduced large errors. We have addressed it in chapter 10 resulting in a reduction of the error by a factor of 100 for most of the states of the system and currently most of …
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Nonlinear Modelling and Stability Analysis of a Subcolled Boiling, Natural Circulation Loop
Made available in DSpace on 2017-07-06T18:48:46Z (GMT). No. of bitstreams: 3 Jackson_Christopher_J_MS.pdf: 53891675 bytes, checksum: ed29c2c1100bf759abee63301232e85b (MD5) Jackson_Christopher_J_MS_ABS.pdf: 537366 bytes, checksum: 5ffecb8f9cceaf5d84559fa5c17095fc (MD5) license.txt: 4813 bytes, …