Results 221 to 230 of about 1,235 (252)

S111012 Churning Loss of Spur Gear in Oil Bath Lubrication

The Proceedings of Mechanical Engineering Congress Japan, 2012
Kazuteru Nagamura, Kiyotaka Ikejo
exaly   +2 more sources

390. The estimation of losses of butterfat in churning

Journal of Dairy Research, 1949
The Bird & Derby method of calculating percentage butterfat loss in buttermilk is in error because it assumes that all the buttermilk in the granules at draining is retained in the buttermilk, whereas much of it is washed out in the wash water. Lactose estimations in butter and buttermilk confirm Udy's finding that butter contains about 10% of ...
F. H. McDowall, A. K. R. McDowell
openaire   +1 more source

A Model for the Prediction of Churning Losses in Geared Transmissions—Preliminary Results

Journal of Mechanical Design, 2006
A series of formulas are presented which enable accurate predictions of churning losses for one pinion characteristic of automotive transmission geometry. The results are based on dimensional analysis and have been experimentally validated over a wide range of speeds, gear geometries, lubricants, and immersion depths.
Changenet, Christophe, Velex, Philippe
openaire   +2 more sources

Influence of Aerated Lubricants on Gear Churning Losses–An Engineering Model

Tribology Transactions, 2011
It is currently assumed that churning losses can be described by using only two physical parameters representative of the lubricant properties, i.e., density and viscosity. To verify this hypothesis, a number of transient measurements were carried out on a specific gear test rig over a range of oil temperatures.
Leprince, Gauthier, Changenet, Christophe, Ville, Fabrice, Velex, Philippe, Dufau, Christophe, Jarnias, Frédéric   +5 more
openaire   +2 more sources

A study of churning losses in dip-lubricated spur gears

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 1999
Churning losses contribute significantly, both to overall inefficiency and to oil heating, in many dip-lubricated transmission systems, notably in automotive applications. For this reason, a reasonably accurate estimate of churning loss is often desirable at the design stage.
P Luke, A V Olver
openaire   +1 more source

Modeling of ball bearing churning losses

Physics of Fluids
Ball bearings are widely used in automotive driveline systems, and their performance plays a crucial role in driveline safety and transmission efficiency. However, the studies on revealing the internal flow mechanism of ball bearings and predicting the churning power loss under jet lubrication system are still insufficient.
Shuai Hu, Wuqi Gong, Xiangyu Xu, Xiaomin Liu   +3 more
openaire   +1 more source

Oil distribution and churning losses of gearboxes: Experimental and numerical analysis

Tribology International, 2020
Abstract Currently, energy efficiency represents one of the main requisites in mechanical design. Gearboxes play an important role in several industrial applications and, even if they are already characterized by high efficiency, their performance can still be improved, leading to energy saving and the reduction of pollutant emissions.
Marco Nicola Mastrone, Erwin Adi Hartono, Valery Chernoray, Franco Concli   +3 more
openaire   +1 more source

CFD Simulation for Reduction of Oil Churning Loss and Windage Loss on Aeroengine Transmission Gears

Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Controls, Diagnostics and Instrumentation; Education; Electric Power; Awards and Honors, 2009
In recent years, the demand for power generation capacity has increased considerably due to the electric drive of air conditioners and so on in the engines of civil aircraft. Therefore, it is estimated that power losses may increase in the gearbox because of generators and pumps that in turn augment fuel consumption.
Hidenori Arisawa, Motohiko Nishimura, Hideyuki Imai, Tatsuhiko Goi   +3 more
openaire   +1 more source

Churning power losses of a gearbox with spiral bevel geared transmission

Tribology International, 2019
Abstract To predict the churning power losses in a gearbox with spiral bevel geared transmission, based on the Computational Fluid Dynamics (CFD) method, a numerical simulation model for the splash lubrication of the intermediate gearbox of a helicopter including gear box housing, a spiral bevel gear pair and an oil guide device is established and ...
Xiaozhou Hu, Yiyao Jiang, Cheng Luo, Longfei Feng, Yu Dai   +4 more
openaire   +1 more source

Experimental and Computational Studies of the No-Load Churning Loss of a Truck Axle

SAE Technical Paper Series, 2020
<div class="section abstract"><div class="htmlview paragraph">This paper describes the work performed in predicting and measuring the contribution of oil churning to the no-load losses of a commercial truck axle at typical running speeds. A computational fluid dynamics (CFD) analysis of the churning losses was conducted.
Luis Silva, William Liou, Yang Yang, John Bair, Claudia M. Fajardo, Steven Wesolowski, Farrukh Qureshi   +6 more
openaire   +1 more source