Results 21 to 30 of about 535,030 (266)

Numerical Investigation on the Cavitating Flow and the Cavitation-induced Noise in the Pump-jet Propeller [PDF]

open access: yesJournal of Applied Fluid Mechanics
The noise hazard posed by cavitation in pump-jet propellers is a significant concern during oceanic operations. This study evaluates the cavitation performance and associated noise characteristics of pump-jet propellers in underwater conditions, further ...
P. Zhang, J. Yuan, Y. Fu, X. Hou, J. Hao
doaj   +1 more source

GRID-FORMING/FOLLOWING CONTROL FOR CONVERTERS OF RENEWABLE ENERGY SOURCES

open access: yesТехнічна електродинаміка, 2021
Have been proposed the new control framework for converters of renewable energy sources (RES-C), based on choosing their operation mode – grid-forming or grid-following in depends on the dynamic stiffness (DS) of the power system for some bus i (control ...
О. Агамалов
doaj   +1 more source

To Pump or Not to Pump [PDF]

open access: yesDiabetes Care, 2002
First fully described in 1983, intensive insulin therapy attempts to match the levels of insulin in the blood with the physiologic needs of the diabetic patient (1). The results of the Diabetes Control and Complications Trial solidified the importance of this approach to the prevention of microvascular complications of diabetes (2).
David S. Schade, Virginia Valentine
openaire   +1 more source

Behavior of axial thrust caused by intake sump vortices in a vertical mixed flow pump

open access: yesNihon Kikai Gakkai ronbunshu, 2017
Axial thrust forces acting on an impeller of a diffuser type mixed flow pump and the behavior of the axial thrust generated by the vortex occurrence in a pump intake sump were studied.
Yuji KANEMORI, Yasuo HANDA
doaj   +1 more source

Compressed Sensing Multiscale Sample Entropy Feature Extraction Method for Underwater Target Radiation Noise

open access: yesIEEE Access, 2022
Accurate underwater target detection and recognition in complex marine environments has always been a challenge. There is a lot of information in underwater target radiation noise that is important for underwater target recognition.
Zhufeng Lei   +4 more
doaj   +1 more source

Performance prediction and experimental study of variable displacement vane oil pump

open access: yesThe Journal of Engineering, 2020
In order to fully predict the performance of variable displacement vane oil pump (VDVP) during concept design phase, one-dimensional simulation software AMESim is used to model the centralised parameters of VDVP.
Shang Hong He   +4 more
doaj   +1 more source

Research on transient heat transfer of ball valves in high-pressure liquid hydrogen receiving stations

open access: yesResults in Engineering, 2023
As one of the most important fluid control devices in the liquid hydrogen receiving station, the liquid hydrogen ball valve's performance directly affects the system's stability.
Shuxun Li   +5 more
doaj   +1 more source

Development of a One-Dimensional Model for the Prediction of Leakage Flows in Rotating Cavities Under Non-Uniform Tangential Pressure Distribution

open access: yesInternational Journal of Turbomachinery, Propulsion and Power, 2019
Regenerative pumps are characterized by a low specific speed that place them between rotary positive displacement pumps and purely radial centrifugal pumps.
Giulio Cantini   +6 more
doaj   +1 more source

Sealing Structure Optimization Of LNG Ultra-Low Temperature And High-Pressure Axial Flow Check Valve

open access: yesJournal of Applied Science and Engineering, 2022
To research the influence of high-speed collision between the valve core and valve seat on sealing performance in the closing process of check valve, the collision between the valve core and valve seat during the check valve closing process was ...
Shuxun Li   +4 more
doaj   +1 more source

Study on the Cavitation Performances and Unsteady Characteristics of a Centrifugal Fire Pump [PDF]

open access: yesJournal of Applied Fluid Mechanics
Centrifugal fire pumps are critical for firefighting systems but suffer from cavitation and instability under off-design conditions. However, systematic analyses of their flow-rate-dependent dynamics remain limited. This study systematically investigates
J. Hao   +6 more
doaj   +1 more source

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