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Evaluation of turbulent dissipation rate retrievals from Doppler Cloud Radar [PDF]

open access: yesAtmospheric Measurement Techniques, 2012
Turbulent dissipation rate retrievals from cloud radar Doppler velocity measurements are evaluated using independent, in situ observations in Arctic stratocumulus clouds. In situ validation data sets of dissipation rate are derived using sonic anemometer
M. D. Shupe, I. M. Brooks, G. Canut
doaj   +13 more sources

Accurate Technique for the Calibration of High-Voltage Capacitance and Dissipation Factor Bridges up to 1 kHz

open access: diamondMetrology
This paper presents a comprehensive methodology for the precise calibration of high-voltage capacitance and dissipation factor (DF) bridges. The technique involves meticulous adjustments using a digital high-precision phase and ratio-measuring system to ...
Mohamed Agazar, Hanane Saadeddine
doaj   +2 more sources

Effect of Metal Oxide Nanoparticles on the Breakdown Voltage of Transformer Oil Containing Cellulose Particles [PDF]

open access: yesNanomaterials
Failures are sometimes attributed to the deterioration of insulating oil, with contamination by cellulose particles. Such contamination lowers the dielectric strength of the oil.
Tarek S. Negm   +2 more
doaj   +2 more sources

A 5.86 Million Quality Factor Cylindrical Resonator with Improved Structural Design Based on Thermoelastic Dissipation Analysis [PDF]

open access: goldSensors, 2020
The cylindrical resonator is the core component of cylindrical resonator gyroscopes (CRGs). The quality factor (Q factor) of the resonator is one crucial parameter that determines the performance of the gyroscope. In this paper, the finite element method
Libin Zeng   +7 more
doaj   +2 more sources

Characterization of the Viscoelastic Properties of Yarn Materials: Dynamic Mechanical Analysis in Longitudinal Direction

open access: yesTextiles, 2023
Warp knitting is a highly productive textile manufacturing process and method of choice for many products. With the current generation of machines running up to 4400 min−1, dynamics become a limit for the production.
Karl Kopelmann   +4 more
doaj   +1 more source

ASSESSMENT OF THE DIELECTRIC PROPERTIES OF POLYESTER/METAKAOLIN COMPOSITE [PDF]

open access: yesEuropean Journal of Materials Science and Engineering, 2021
One of the promising and exciting avenues for developing effective and efficient dielectric materials with high energy density and low cost is the recent approach of introducing inorganic nanoparticles into polymer matrices to form dielectric polymer ...
Jonathan D. GAIYA   +5 more
doaj   +1 more source

Importance of Depolarization Current in the Diagnosis of Oil-Paper Insulation of Power Transformer

open access: yesIEEE Access, 2023
Recently, Polarization Depolarization current (PDC) measurement is widely accepted time domain spectroscopy-based method for assessing the insulation condition.
Alok Kumar, Deepak Mishra, Arijit Baral
doaj   +1 more source

Dielectric Performance of Natural- and Synthetic-Ester-Based Nanofluids with Fullerene Nanoparticles

open access: yesEnergies, 2022
According to the latest research, nanofluids as a possible future substitution for high-voltage equipment insulation have the potential to enhance the heat transfer and insulation properties of their base fluids.
Miloš Šárpataky   +4 more
doaj   +1 more source

Use of Tanδ and Partial Discharge for Evaluating the Cable Termination Assembly

open access: yesEnergies, 2020
It is known that the failure of cable terminations causes power outages and impairs system quality and continuity. Besides, serious economic losses on both the distribution and consumer sides occur. In this study, the dielectric behavior of the cable and
Cihat Cagdas Uydur, Oktay Arikan
doaj   +1 more source

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