Results 71 to 80 of about 6,045 (208)

Separation Timescales of Vertically Migrating Zooplankton and Other (a)Biotic Materials in the Benguela System

Journal of Geophysical Research: Oceans, Volume 130, Issue 4, April 2025.
Abstract Plankton, plastics, nutrients, and other materials in the ocean can exhibit different dispersion patterns depending on their individual transport properties. These dispersion patterns can provide information on the effective timescales of interaction between different types of materials in a highly dynamic ocean environment, such as the ...
Darshika Manral, Laura Gómez‐Navarro, Michael C. Denes, Doroteaciro Iovino, Pier Giuseppe Fogli, Simona Masina, Ismael Hernández‐Carrasco, Linda Amaral‐Zettler, Marcello Vichi, Erik van Sebille   +9 more
wiley   +1 more source

Analytical and Experimental Investigation of Windage–Churning Behavior in Spur, Bevel, and Face Gears

Applied Sciences
This paper presents comparable sets of the no-load power loss as a product of windage and churning behaviors of a family of various rotating parts (i.e., disc, spur gear, straight bevel gear, and orthogonal face gear).
Yu Dai, Caihua Yang, He Liu, Xiang Zhu
doaj   +1 more source

Baseline Experimental Results on the Effect of Oil Temperature on Shrouded Meshed Spur Gear Windage Power Loss [PDF]

Rotorcraft gearbox efficiencies are reduced at increased surface speeds due to viscous and impingement drag on the gear teeth. This windage power loss can affect overall mission range, payload, and frequency of transmission maintenance.
Delgado, Irebert R., Hurrell, Michael James   +1 more
core   +2 more sources

Ocean Surface Wave Slopes and Wind‐Wave Alignment Observed in Hurricane Idalia

Journal of Geophysical Research: Oceans, Volume 130, Issue 2, February 2025.
Abstract Drifting buoy observations in Hurricane Idalia (2023) are used to investigate the dependence of ocean surface wave mean square slope on wind, wave, and storm characteristics. Mean square slope has a primary dependence on wind speed that is linear at low‐to‐moderate wind speeds and approaches saturation at high wind speeds (> ${ >} $20 m s−1 ${\
Jacob R. Davis, Jim Thomson, Isabel A. Houghton, Chris W. Fairall, Brian J. Butterworth, Elizabeth J. Thompson, Gijs de Boer, James D. Doyle, Jonathan R. Moskaitis   +8 more
wiley   +1 more source

Assessing the Meshing for Windage Power Loss Simulations of an Orthogonal Face Gear

Machines
In the current energy landscape, efficiency is a critical topic. Therefore, even in the case of geared transmissions, it is essential to predict and calculate power losses as accurately as possible from the design phase. There are mainly three categories
Tiberiu-Daniel Pau, Zoltan-Iosif Korka, Dorian Nedelcu, Corneliu Hrimiuc   +3 more
doaj   +1 more source

Monitoring multi-year macro ocean litter dynamics and backward-tracking simulation of litter origins on a remote island in the South China Sea

Environmental Research Letters, 2018
Ocean litter has accumulated rapidly and is becoming a major environmental concern, yet quantitative and regular observations and exploration that track litter origins are limited. By implementing monthly sample collections over five years (2012–2016) at
Chia-Ying Ko, Yi-Chia Hsin, Teng-Lang Yu, Kuo-Lieh Liu, Fuh-Kwo Shiah, Ming-Shiou Jeng   +5 more
doaj   +1 more source

Spur-Gear-System Efficiency at Part and Full Load [PDF]

A simple method for predicting the part- and full-load power loss of a steel spur gearset of arbitrary geometry supported by ball bearings is described. The analysis algebraically accounts for losses due to gear sliding, rolling traction, and windage in ...
Anderson, N. E., Loewenthal, S. H.
core   +1 more source

Numerical and analytical investigations of the water immersion cooling strategy for a permanent magnet synchronous motor

IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.
Elevated operating temperatures in permanent magnet synchronous motors (PMSMs) induce performance degradation due to partial demagnetization of the permanent magnets and accelerated aging of the insulation system. Effective thermal management is, therefore, critical for ensuring optimal motor performance and longevity.
Tohid Sharifi
wiley   +1 more source

Assessment of Parameter Estimation Methods for Nonintrusive Loss Estimation of Induction Motors

IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.
Nine methods for induction motor equivalent circuit parameter estimation from catalogue data for on‐site loss estimation are assessed. The combination of high accuracy and total absence of nonphysical results is not found in any of the tested methods. The case study of loss estimation with tested motors shows that good accuracy is achievable as long as
Carlos A. C. Wengerkievicz, Nelson J. Batistela, Nelson Sadowski, Cristhian Becker, Humberto Verdejo   +4 more
wiley   +1 more source

Action mechanism of axial flow on windage loss in open shaft‐type gap with CO2

Energy Science & Engineering
The windage loss in rotor‐stator gap has an important effect on rotating machinery, especially with higher rotational speed and fluid density. However, the mechanism of axial flow on windage loss in open shaft‐type gap is hardly studied in most ...
Lehao Hu, Qinghua Deng, Zhouyang Liu, Jun Li, Zhenping Feng   +4 more
doaj   +1 more source