Results 1 to 10 of about 5,676,493 (290)
Leakage Characteristics of Proportional Directional Valve
Processes, 2023 This paper deals with the analysis of leakage characteristics of the proportional directional valve. These characteristics distinguish a real directional valve from an ideal one. The ideal directional valve is characterized by zero leakage due to its perfect geometry.
Adam Bureček, Marian Ledvoň
exaly +3 more sources
Machines, 2023 A spring-energized seal, whose PTFE plastic shell has excellent self-lubrication and a low temperature stability, is used widely in liquid fuel valves’ rotating end-face seals.
Dengyu Liu +4 more
doaj +3 more sources
Sensors, 2021 Leakage detection methods based on the analysis of leakage acoustic signals provide an effective technical approach for detecting small leaks in water supply pipelines.
Yunfei Li +5 more
doaj +3 more sources
Machines, 2022 In this study, to improve the accuracy of the brush seal heat transfer model, based on the finite volume method (FVM) coupled with the three-dimensional Reynold-averaged Naviers-Stokes equations (RANS) equations of the Local temperature non-equilibrium ...
Jiahao Zhang, Meihong Liu, Neng Peng
doaj +3 more sources
Numerical Analysis on Pipeline Leakage Characteristics for Incompressible Flow
Journal of Applied Fluid Mechanics, 2019 Systematic Computational Fluid Dynamics (CFD) simulations on incompressible water pipe flow with leakage were conducted in the present study. The aim is to provide the understanding of how different parameters, including the leakage pipe diameter, inlet ...
Z. Zeng, R. Luo
doaj +4 more sources
Leakage Characteristics and Experimental Research of Staggered Labyrinth Sealing
LubricantsThe staggered labyrinth seal is widely used in aerospace, transportation, mining, and other fields due to its advantages of adapting to high speed, reliable sealing performance, and low or even frictionless friction between dynamic and static rotors. The
Na Wang +4 more
doaj +3 more sources
EnergiesTo investigate the leakage characteristics of pure hydrogen and hydrogen-blended natural gas in medium- and low-pressure buried pipelines, this study establishes a three-dimensional leakage model based on Computational Fluid Dynamics (CFD).
Jiadong Li, Bingchuan Xie, Liang Gong
doaj +3 more sources
LubricantsInnovating seal structures and optimizing size parameters are effective ways to enhance the leakage characteristics of labyrinth seals (LSs). Inspired by the ecological fishways with high flow resistance on dam sides, a novel bio-inspired staggered ...
Zhentao Yu +4 more
doaj +3 more sources
Characteristics of Central Serous Chorioretinopathy without Leakage
Journal of Current Ophthalmology, 2021 Purpose: To describe optical coherence tomography (OCT) characteristics of central serous chorioretinopathy (CSCR) without any hyperfluorescent leakage on fundus fluorescein angiography (FFA). Methods: This was a multicentric, retrospective, observational study of ten eyes of ten ...
Parameswarappa, Deepika C. +4 more
openaire +3 more sources
Machines, 2022 In order to study the frictional lubrication characteristics of a piston pump under varying loads and speeds in actual work, mathematical models, such as a cylinder dynamics model, cylinder micro-motion model, and external return spherical bearing pair ...
Haishun Deng +3 more
doaj +1 more source