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4 results on '"multi-horizontal-submerged jets"'

1. Advances in Hydraulics and Hydroinformatics Volume 2.

Author

Zhou, Jianguo, Zhang, Jianmin, Peng, Yong, Borthwick, Alistair, and Zhou, Jianguo

Subjects
History of engineering & technology, chute aerator, spillway bottom, air concentration, air bubble frequency, air bubble chord length, evolution of precipitation, model simulation, information entropy theory, desert-oasis areas, Tarim Basin, gravity wave model, dam-break flood, image processing technology, experimental study, cavitation bubble, high-speed photography, impact pressure, micro-jet, Ningxia-Inner Mongolia, Yellow River, riverbank collapse, BSTEM model, flood &amp, dry season, sediment transport, finite crest length weir, FGP (flaring gate pier), discharge coefficient, subcritical flow, river flow modeling, sediment transport simulation, automation of flow modeling, HEC-RAS controller, python scripting, three-dimensional aerator, multi-horizontal-submerged jets, energy dissipation, near-field vibration, fluctuating pressure, gate-opening modes, collapse near a wall, double cavitation bubble, tilt distribution cavitation, parallel cavitation, pseudopotential lattice Boltzmann model, numerical simulation, pooled stepped spillway, pool weir, flow property, surface-piercing propeller, artificial ventilation, hydrodynamic performance, LES-VOF method, flow-induced vibration, plane gate, numerical analysis, bridge scour, submerged flow, physical hydraulic modeling, ski-jump flow, spillway outlet, jet trajectory, experimental model, rainfall intensity distribution, two water jets, collision in air, Gaussian distribution, trajectory line, clogging, drip irrigation, flushing, particle size distribution, sediments, submerged jets, aerated flow, plunge pool, trapezoidal cross-section, U-shaped channel, radius-to-width ratio, slope coefficient, hydraulic characteristics, hydraulic jump, Froude number, stilling basin with shallow-water cushion (SBSWC), large eddy simulation, best depth, CFD-DEM coupling, hydrocyclone, particle shape, particle size, water and sediment separation, stepped dropshaft, flow region, central angle of step, free surface measurement, optical motion capturing, tank test, wave gauge, sloshing, offset jet, potential core, decay rate, k-ε model, abutment, overtopping flow, pressure flow, scour and velocity field, Y-shaped confluence channel, non-submerged rigid vegetation, longitudinal velocity, secondary flow, turbulent kinetic energy, wetland, lattice Boltzmann method, shallow lake, drag force, water-saving irrigation development level, Sichuan province, TOPSIS method, experiment, particle image velocimetry, 3D confined wall jet, mean flow, multiple bubble collapse, pressure wave energy, energy conversion rate, consistent particle method, solitary wave, submerged breakwater, breaking wave, vortex, free surface flow, embankment weir, bridge piers, turbulence, CFD, sediment, transforming mechanism, open channel bend, velocity distribution, PIV, hyporheic exchange, surface−groundwater flow process, influencing factors, orthogonal tests, sensitivity analysis, linearly moved irrigation system, application depth, moving speed, uniformity coefficient, tidal discharge, phase difference, tidal channel junction, flow division, fluvial acoustic tomography, wavelet analysis, DEM, hydrodynamic modelling, river bathymetry, floods, Bathy-supp, coherent vortex structure, backward-facing step, synchronized PIV, separation and reattachment, free shear layer, vortical evolution
Abstract

Summary: This Special Issue reports on recent research trends in hydraulics, hydrodynamics, and hydroinformatics, and their novel applications in practical engineering. The Issue covers a wide range of topics, including open channel flows, sediment transport dynamics, two-phase flows, flow-induced vibration and water quality. The collected papers provide insight into new developments in physical, mathematical, and numerical modelling of important problems in hydraulics and hydroinformatics, and include demonstrations of the application of such models in water resources engineering.

2. Experimental Optimization of Gate-Opening Modes to Minimize Near-Field Vibrations in Hydropower Stations

Author

Yong Peng, Jianmin Zhang, Weilin Xu, and Matteo Rubinato

Subjects
multi-horizontal-submerged jets, energy dissipation, near-field vibration, fluctuating pressure, gate-opening modes, Hydraulic engineering, TC1-978, Water supply for domestic and industrial purposes, TD201-500
Abstract

Multi-Horizontal-Submerged Jets are successfully applied to dissipate energy within a large-scale hydropower station. However, notable near-field vibrations are generated when releasing high discharges through the gates, which is generally typical in a flooding case scenario. Under these conditions, the magnitude of the vibrations varies when applying different gate-opening modes. To investigate and find optimized gate-opening modes to reduce the near-field vibration, multiple combinations were tested by varying gate-opening modes and hydraulic conditions. For each of the tests conducted, fluctuating pressures acting on side-walls and bottoms of a stilling basin were measured. The collected datasets were used to determine the maximum and minimum fluctuating pressure values associated with the correspondent gate-opening mode and a detailed comparison between each of the gate-opening modes was completed. The paper presents the quantitative analysis of the discharge ratio’s effect on fluctuating pressures. It also investigates the influence of different gate-opening modes by including side to middle spillways and upper to lower spillways configurations. The flow pattern evolutions triggered by each different gate-opening mode are discussed and optimal configurations that minimize near-field vibrations at high discharges are recommended to support both the design of new systems and assessment of the performance of existing ones.

Published
2018
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3. Experimental Optimization of Gate-Opening Modes to Minimize Near-Field Vibrations in Hydropower Stations

Author

Y. Peng, Matteo Rubinato, Jianming Zhang, and Weilin Xu

Subjects
energy dissipation, lcsh:Hydraulic engineering, 0208 environmental biotechnology, Geography, Planning and Development, near-field vibration, Near and far field, 02 engineering and technology, Aquatic Science, Biochemistry, lcsh:Water supply for domestic and industrial purposes, lcsh:TC1-978, fluctuating pressure, Hydropower, Water Science and Technology, Stilling basin, lcsh:TD201-500, Fluctuating pressure, business.industry, Mechanics, gate-opening modes, Flow pattern, Dissipation, 020801 environmental engineering, Vibration, multi-horizontal-submerged jets, Environmental science, business
Abstract

Multi-Horizontal-Submerged Jets are successfully applied to dissipate energy within a large-scale hydropower station. However, notable near-field vibrations are generated when releasing high discharges through the gates, which is generally typical in a flooding case scenario. Under these conditions, the magnitude of the vibrations varies when applying different gate-opening modes. To investigate and find optimized gate-opening modes to reduce the near-field vibration, multiple combinations were tested by varying gate-opening modes and hydraulic conditions. For each of the tests conducted, fluctuating pressures acting on side-walls and bottoms of a stilling basin were measured. The collected datasets were used to determine the maximum and minimum fluctuating pressure values associated with the correspondent gate-opening mode and a detailed comparison between each of the gate-opening modes was completed. The paper presents the quantitative analysis of the discharge ratio&rsquo, s effect on fluctuating pressures. It also investigates the influence of different gate-opening modes by including side to middle spillways and upper to lower spillways configurations. The flow pattern evolutions triggered by each different gate-opening mode are discussed and optimal configurations that minimize near-field vibrations at high discharges are recommended to support both the design of new systems and assessment of the performance of existing ones.

Published
2018

4. Experimental Optimization of Gate-Opening Modes to Minimize Near-Field Vibrations in Hydropower Stations.

Author

Peng, Yong, Zhang, Jianmin, Xu, Weilin, and Rubinato, Matteo

Subjects
WATER power, SUBMERGED structures, HYDRAULICS, ENERGY dissipation, SPILLWAYS
Abstract

Multi-Horizontal-Submerged Jets are successfully applied to dissipate energy within a large-scale hydropower station. However, notable near-field vibrations are generated when releasing high discharges through the gates, which is generally typical in a flooding case scenario. Under these conditions, the magnitude of the vibrations varies when applying different gate-opening modes. To investigate and find optimized gate-opening modes to reduce the near-field vibration, multiple combinations were tested by varying gate-opening modes and hydraulic conditions. For each of the tests conducted, fluctuating pressures acting on side-walls and bottoms of a stilling basin were measured. The collected datasets were used to determine the maximum and minimum fluctuating pressure values associated with the correspondent gate-opening mode and a detailed comparison between each of the gate-opening modes was completed. The paper presents the quantitative analysis of the discharge ratio's effect on fluctuating pressures. It also investigates the influence of different gate-opening modes by including side to middle spillways and upper to lower spillways configurations. The flow pattern evolutions triggered by each different gate-opening mode are discussed and optimal configurations that minimize near-field vibrations at high discharges are recommended to support both the design of new systems and assessment of the performance of existing ones. [ABSTRACT FROM AUTHOR]

Published
2018
Full Text
View/download PDF

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