vortex ring


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vortex ring

[′vȯr‚teks ‚riŋ]
(fluid mechanics)
A line vortex in which the line of concentrated vorticity is a closed curve. Also known as collar vortex; ring vortex.
References in periodicals archive ?
In the region near the nozzle exit, vortex rings are first formed in the region where the shear layer oscillate at the frequency around 140Hz.
2] denote the minimum and maximum distances from the reference point to the vortex ring, respectively; and [F.
Helmholtz called these vortex tubes returning into themselves vortex rings (cf.
The pilot considered he then entered a Vortex Ring situation and due to the low altitude was unable to recover before the helicopter landed heavily.
I had thought we had a flight-control malfunction; we still weren't recognizing the effects of vortex ring state.
The V-22 is much less susceptible to Vortex Ring State [than a helicopter]," Schultz said.
In the tube type, slugs of fluid are continuously taken in and ejected from a tube inserted in the fluid, creating a stream of vortex rings moving though the fluid.
As a result, from start to finish an airfoil produces a single, infinitely stretched vortex ring.
In each case, the helicopter descended into rotor downwash and entered what is commonly called the vortex ring state (VRS).
He covers the Faraday-Maxwell fields, the electron, blackbody radiation, atomic structure, light and action, mass vortex rings, the magnetic vortex field, and the electric vortex field.
There's a return from some of the most popular items from last year such as the archaeogenetics sandpit, where children can search for hidden dinosaur bones, as well as new and exciting installations such as the Vortex with its huge large steel air-ducts and cones that will produce sound inspired by vortex rings travelling through the atmosphere.