Visualization of the Trailing Vortices Using Cavitation Inception Bubbles
نویسندگان
چکیده
منابع مشابه
The acoustic emissions of cavitation bubbles in stretched vortices.
Pairs of unequal strength, counter-rotating vortices were produced in order to examine the inception, dynamics, and acoustic emission of cavitation bubbles in rapidly stretching vortices. The acoustic signatures of these cavitation bubbles were characterized during their inception, growth, and collapse. Growing and collapsing bubbles often produced a sharp, broadband, pop sound. The spectrum of...
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Trailing vortices have been repeatedly shown to exhibit a remarkably robust selfsimilarity independent of the Reynolds number and upstream boundary conditions. The collapse of the inner-scaled circulation profiles of a trailing vortex has even been previously demonstrated for the cases of highly unsteady and turbulent vortex systems, as well as for vortices which were incompletely developed. A ...
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Cavitation has been investigated in directional control valves in order to identify damage mechanisms characteristic of components o f aircraft hydraulic systems. Tests have been conducted in a representative metal spool valve and in a model three times larger. Data taken under noncavitating conditions with both valves showed that the position of the high-velocity annular jet shifts orientation...
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The tensile strength of ordinary water such as tap water or seawater is typically well below 1 bar. It is governed by cavitation nuclei in the water, not by the tensile strength of the water itself, which is extremely high. Different models of the nuclei have been suggested over the years, and experimental investigations of bubbles and cavitation inception have been presented. These results sug...
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Cavitation inception in the near-field of high Reynolds number axisymmetric jets is analyzed using a simplified computational model. The model combines an axisymmetric vorticitystreamfunction finite-difference scheme for the simulation of the unsteady flow field. Using a simplified representation, microscopic bubbles are injected at the jet inlet. The motion of these bubbles is tracked in a Lag...
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ژورنال
عنوان ژورنال: Journal of the Visualization Society of Japan
سال: 2001
ISSN: 1884-037X,0916-4731
DOI: 10.3154/jvs.21.1supplement_95