Results 21 to 30 of about 655,300 (307)
Applied Sciences, 2020 This paper takes a pump-turbine as the research subject and, based on the Computational Fluid Dynamics (CFD) numerical method and combined with test data, investigates the pressure fluctuation characteristics in the pump mode and analyzes the pressure ...
Ping Huang +4 more
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Research on Vertical SEC Centrifugal Pump Multi-Fault Diagnosis Based on WPT–SVM
Energies, 2023 To diagnose common failures in vertical Essential Service Water Pumps (SEC), a method combining the wavelet packet transform (WPT) and the support vector machine (SVM) was adopted.
Rongsheng Zhu +6 more
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Research on the Hydrodynamic Noise Characteristics of a Mixed-Flow Pump
Journal of Marine Science and Engineering, 2023 This study presents a comprehensive investigation of the internal noise characteristics of a mixed-flow pump by combining computational fluid dynamics (CFD) and computational acoustics. The turbulent flow field of the pump is simulated using the unsteady
Qiaoyue Yang +6 more
doaj +1 more source
Non-abelian superconducting pumps [PDF]
, 2008 Cooper pair pumping is a coherent process. We derive a general expression for the adiabatic pumped charge in superconducting nanocircuits in the presence of level degeneracy and relate it to non-Abelian holonomies of Wilczek and Zee.
Brosco, Valentina +3 more
core +5 more sources
The Cavitation Nuclei Transient Characteristics of Lennard-Jones Fluid in Cavitation Inception
Polish Maritime Research, 2018 In the field of ocean engineering, cavitation is widespread, for the study of cavitation nuclei transient characteristics in cavitation inception, we applied theoretical analysis and molecular dynamics (MD) simulation to study Lennard-Jones (L-J) fluid ...
Qiang Fu +5 more
doaj +1 more source
Comprehensive Research on the Effects of Different Launch Conditions on Pump-jet Propulsor Performance [PDF]
Journal of Applied Fluid MechanicsThis paper compares the cavitation of a pump-jet propulsor under different launch conditions and discusses the effects of cavitation on the performance and noise of the pump-jet propulsor rotor blade.
Q. Fu, Y. Duan, W. Shi, H. Li, R. Zhu
doaj +1 more source
Mathematics, 2020 Rotor-stator interaction (RSI) in the centrifugal pump-as-turbine (PAT) is a significant source of high amplitude of the pressure pulsation and the flow-induced vibration, which is detrimental to the stable operation of PAT. It is therefore imperative to
Jian Xu +4 more
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Theory and applications of four-wave mixing in photorefractive media [PDF]
, 1984 The development of a theory of four-wave mixing in photo-refractive crystals is described. This theory is solved in the undepleted pumps approximation with linear absorption and without using the undepleted pumps approximation for negligible absorption ...
Cronin-Golomb, Mark +3 more
core +1 more source
A confluence of new technology and the right to water: Experience and potential from South Africa's constitution and commons [PDF]
, 2014 South Africa's groundbreaking constitution explicitly confers a right of access to sufficient water (section 27). But the country is officially 'water-stressed' and around 10 % of the population still has no access to on-site or off-site piped or tap ...
Cooper, N, Swan, A, Townend, D
core +1 more source
Dynamic Analysis of Cavitation Tip Vortex of Pump-Jet Propeller Based on DES
Applied Sciences, 2020 When a pump-jet propeller rotates at high speeds, a tip vortex is usually generated in the tip clearance region. This vortex interacts with the main channel fluid flow leading to the main energy loss of the rotor system.
Jianping Yuan +6 more
doaj +1 more source