Results 11 to 20 of about 1,708,324 (306)

Femtosecond Pump-Probe Diagnostics Of Preformed Plasma Channels [PDF]

open access: yes, 2004
We report on recent ultrafast pump-probe experiments 28 in He plasma waveguides using 800 nm, 80 fs pump pulses of 0.2 x 1018 W/cm2 peak guided intensity, and single orthogonally-polarized 800 nm probe pulses with similar to0.1% of pump intensity.
Debus, A.   +5 more
core   +1 more source

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

Prediction approach of compression loss in bent-axis piston pump with cavitation

open access: yesAdvances in Mechanical Engineering, 2022
Compression loss is one of the volumetric losses of bent-axis piston pumps, and its accurate evaluation is the basis for predicting the effective flow rate and volumetric efficiency of bent-axis piston pumps.
Lv-jun Qing   +3 more
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

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

Production system and method for producing fluids from a well [PDF]

open access: yes, 2002
A production system and method for producing fluids from a well are presented. The production system may include a submersible pump and a jet pump. The submersible pump may be arranged within the well.
Carvalho, Paulo M.   +2 more
core   +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

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

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

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

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