Results 11 to 20 of about 8,125 (264)
Tomographic PIV measurement of a re-entrant jet in a cavitating venturi
14th International Symposium on Particle Image Velocimetry, 2021 Partial cavitation occurs when low-pressure regions caused by separated shear layers are filled with vapours. Partial cavitation is inherently unsteady and leads to periodic cloud shedding. The periodically generated re-entrant jet travelling beneath the vapour cavity is considered as one of the mechanisms responsible for the periodic cloud shedding ...
Gawandalkar, Udhav Ulhas +1 more
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The cavitation instability induced by the development of a re-entrant jet
Journal of Fluid Mechanics, 2001 The instability of a partial cavity induced by the development of a re-entrant jet is investigated on the basis of experiments conducted on a diverging step. Detailed visualizations of the cavity behaviour allowed us to identify the domain of the re-entrant jet instability which leads to classical cloud cavitation.
Callenaere, Mathieu +3 more
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The structure of near-wall re-entrant flow and its influence on cloud cavitation instability. [PDF]
Exp Fluids, 2022 : The so-called ‘re-entrant jet’ is fundamental to periodic cloud shedding in partial cavitation. However, the exact physical mechanism governing this phenomenon remains ambiguous.
Gawandalkar U, Poelma C.
europepmc +2 more sources
Applied Sciences, 2021 Recent experiments have shown interactions between the cavitation and fluid vortex formation in a hydrodynamic torque converter. This study aimed to clarify the unsteady cavitation trigger mechanism and flow-induced vibration caused by turbulence ...
Zilin Ran, Wenxing Ma, Chunbao Liu
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Investigation for Unsteady Cavitation and Re-entrant Jet on a Foil Section
Journal of the Society of Naval Architects of Japan, 2001 The mechanism of cloud cavitation generation from a sheet cavity on a foil section has been studied by several researchers. It has been revealed that re-entrant jet cuts the leading edge of sheet cavity and breaks the clear vapour structure into small bubble clusters as cloud cavity.
Ryo Yakushiji +4 more
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Study on Unsteady Cavitation Flow and Pressure Pulsation Characteristics in the Regulating Valve
Shock and Vibration, 2021 A combined numerical-experiment investigation on the unsteady cavitation flow and pressure fluctuation characteristics in the regulating valves is conducted in this paper. The cavitation flow in the regulating valve is an unsteady and periodic flow which
Liu Xiumei +6 more
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Numerical Insight into the Kelvin-Helmholtz Instability Appearance in Cavitating Flow
Applied Sciences, 2021 Recently the development of Kelvin-Helmholtz instability in cavitating flow in Venturi microchannels was discovered. Its importance is not negligible, as it destabilizes the shear layer and promotes instabilities and turbulent eddies formation in the ...
Peter Pipp +2 more
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Energies, 2023 We perform large-eddy simulations to study a cavitating flow over a two-dimensional hydrofoil section—a scaled-down profile (1:13.26) of guide vanes of a Francis turbine—using the Schnerr–Sauer cavitation model with an adaptive mesh refinement in ...
Elizaveta Ivashchenko +4 more
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Advances in Mechanical Engineering, 2016 The objective of this article is to investigate the flow structure of the ventilated cavitation around an under-water vehicle. In the experiments, a high-speed camera system is used to observe cavity evolution of the unsteady cavitation flow, the ...
Xiaoshi Zhang +3 more
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Passive control of cavitating flow around an axisymmetric projectile by using a trip bar
Theoretical and Applied Mechanics Letters, 2017 Quasi-periodical evolutions such as shedding and collapsing of unsteady cloud cavitating flow, induce strong pressure fluctuations, what may deteriorate maneuvering stability and corrode surfaces of underwater vehicles.
Jian Huang +4 more
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