Results 31 to 40 of about 7,208 (162)
Alexandria Engineering Journal, 2023 Raising rotational speed and operating pressure is an effective way to increase the power density of axial piston pumps. However, the axial piston pump with standard hollow pistons suffers from problems of volumetric losses, pressure ripple, and ...
Qun Chao +3 more
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Simulation Analysis and Experiment of Variable-Displacement Asymmetric Axial Piston Pump
Applied Sciences, 2017 The variable displacement pump control system has greater energy-saving advantages and application prospects than the valve control system. However, the variable displacement pump control of differential cylinder is not concurrent with the existing ...
Youshan Gao +3 more
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Wave Ripples Spaced by Flow Downstream of Ripple Peaks
Eos, 2015 The well-known ratio between sand ripple spacing and wave-driven flow oscillations may be dictated by flow dynamics downstream of ripple crests.
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Output Ripple Difference and Following Lightweight Design of External Gear Pumps and Motors
Jixie chuandong, 2023 In order to clarify the different output mechanism and following ripple difference between external gear pump and motor, based on the reverse design method from performance to gear parameter and special involute feature without undercut, from the contact
Wang Hao, Song Anran, Li Yulong
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Micromachines, 2021 As the power sources in hydraulic systems, variable displacement axial piston pumps generate flow fluctuation. Unfortunately, it results in pressure pulsation which excites the system vibration and emitted noise.
Xiaochen Huang +5 more
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Inferring Airflow Across Martian Dunes From Ripple Patterns and Dynamics
Frontiers in Earth Science, 2021 Large ripples form striking patterns on the slopes of martian sand dunes which can be mapped and tracked using high-resolution optical images. The ripples vary in orientation, wavelength, plan-view morphology, and rates of migration.
D. R. Hood +6 more
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Energies, 2021 The efficiency requirements for hydraulic pumps applied in automatic transmissions in future generations of automobiles will increase continuously. In addition, the pumps must be able to cope with multiphase flows to a certain extent.
Thomas Lobsinger +3 more
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EnergiesThis paper concerns the utilisation of a gas bladder hydraulic suppressor to mitigate oscillations in the delivery flow rate of positive displacement machines.
Paolo Casoli +3 more
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Numerical Modeling and Simulation of Wind Blown Sand Morphology under Complex Wind-Flow Field
Journal of Applied Mathematics, 2014 The flow field and the sand flow field constitutive equations are analyzed at first, then the different desert highway numerical models are established by considering the crossroad and by changing the road surface height and air stream flow field, then ...
Xamxinur Abdikerem +3 more
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FLOW NEAR SAND RIPPLES AND DISSIPATION OF WAVE ENERGY
Doboku Gakkai Ronbunshu, 1989 The present paper deals with vortex shedding from ripples and the associated wave energy dissipation. The circulation of the vortices is estimated with potential flow theory, applying Kutta's condition at the crest of ripples, which indicates that the circulation has a functional relationship with period of fluid oscillation, boundary layer thickness ...
Syunsuke Ikeda +3 more
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