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FREE JET [6 records]

Record 1 2008-03-12

English

Subject field(s)
  • Oceanography
DEF

One of the western boundary currents of the North Pacific subtropical gyre.

OBS

A deep, narrow, and swift current, it continues from the Philippines Current in a northeastward direction from Taiwan along the continental rise of the East China Sea, through Tokara Strait, and close to the eastern coast of Japan. At 35°N it separates from the coast and flows eastward into the Pacific as a free jet known as the Kuroshio Extension. It forms a marked temperature and salinity front with the Oyashio, which meets the Kuroshio Extension from the north and then flows parallel to it. Like all other western boundary currents, the Kuroshio develops instabilities and sheds eddies. Its unique characteristic is that south of Honshu it switches between three quasi-stable paths across the Izu Ridge at irregular intervals of 18 months to several years. Volume transport in the Kuroshio increases downstream and reaches 57 Sv... in the Kuroshio Extension, increasing seasonally by 15% during summer. The current's path in the extension is characterized by large meridional excursions in the so-called First and Second Crest at 145° and 152°E. On approaching the Shatsky Rise at 157°E, the Kuroshio Extension divides into several paths that tend to recombine before the Emperor Seamounts near 170°E cause the current to split again and disintegrate. The flow then continues as the North Pacific Current.

OBS

Black Stream: It’s also sometimes known as the Black Stream-the English translation of kuroshio, and an allusion to the deep blue of its water-and also as the Japan Current.

French

Domaine(s)
  • Océanographie
DEF

Courant océanique se mouvant vers le nord-est de Formose à Riukiu et près de la côte du Japon aussi loin que la latitude de 35 degrés nord.

CONT

Le courant de Kuroshio ou courant de Kuro-Shivo est le second plus grand courant marin au monde (après le Gulf Stream). Il débute dans l'ouest de l'océan Pacifique au large de la côte orientale de Taiwan et se dirige vers les eaux au nord-est du Japon où il fusionne avec la dérive orientale du courant du Nord Pacifique. Il a un rôle analogue à celui du Gulf Stream dans l'océan Atlantique, transportant des eaux chaudes tropicales vers le Nord et les régions polaires.

OBS

Ce courant est aussi appelé courant du Japon ou courant Noir, la traduction littérale du japonais kuroshio, allusion à la couleur bleu sombre de ses eaux.

Spanish

Campo(s) temático(s)
  • Oceanografía
Save record 1

Record 2 2002-04-09

English

Subject field(s)
  • Processing of Mineral Products
  • Mineral Processing (Metallurgy)
CONT

Washing and Scrubbing the Ore. Washing of run-of-mine ore removes obscuring dust and casual dirt from the surface of the pieces and facilitates recognition when hand picking is to be practised. A second effect may be the removal of primary slimes of no value. Clays, colloidal fines, and similar valueless material can easily be taken out at the earlier stages, but may be difficult to remove once fine crushing has liberated a substantial quantity of finely shattered mineral. ... The disintegrating forces used are of a gentle nature, not intended to fracture the ore but simply to tumble particle against particle until the desired amount of cleansing has been accomplished.

OBS

scrubber : A device, such as a wash screen, wash trommel, log washer, and hydraulic jet or monitor, in which a coarse and sticky material, for example, ore or clay, is either washed free of adherents or mildly disintegrated.

French

Domaine(s)
  • Préparation des produits miniers
  • Minéralurgie (Métallurgie)
DEF

Lavage d'un minerai argileux ou boueux pour le débarrasser de l'argile qui l'empâte.

CONT

Débourbage. Dans certaines exploitations, le tout-venant est mêlé d'argile; après concassage, il est débourbé par brassage avec de l'eau, soit dans un cylindre horizontal en rotation lente dont les palettes fixées à l'intérieur font progresser le minerai vers l'extrémité de sortie, soit dans un cylindre vibrant, ou encore sur des vibrocribles violemment arrosés, ou enfin dans une auge brassée par deux arbres munis de pales («log washer»).

Spanish

Save record 2

Record 3 2001-04-11

English

Subject field(s)
  • Atomic Physics
CONT

The quarks that account for most reactions cannot be seen in their free, or "naked", state, because at birth they undergo a process called hadronization. Each quark "clothes" itself in a jet of hadrons, numbering 15 on average, two thirds of which are charged.

CONT

Effects of non-perturbative QCD and higher-order effects during hadronisation must also be evaluated.

French

Domaine(s)
  • Physique atomique
CONT

La fragmentation (ou hadronisation) d'une paire de quarks charmés dans le modèle de cassure de corde.

Spanish

Campo(s) temático(s)
  • Física atómica
CONT

Los quarks que dan cuenta de la mayoría de las reacciones no se pueden ver en estado libre, o "desnudo". En cuanto se crean, sufren un proceso de hadronización, en virtud del cual cada quark se "viste" de un chorro de hadrones, con un promedio de quince, dos terceras partes de los cuales tienen carga.

Save record 3

Record 4 1999-06-11

English

Subject field(s)
  • Thermodynamics
  • Physics
CONT

Heat transfer coefficients are shown as functions of downstream and transverse plate coordinates as determined experimentally for different blowing ratios near one and for levels of free stream turbulence from 1 percent to 17 percent of the free stream velocity. Heat transfer between the plate and the free stream is reduced by the film cooling at higher levels of free stream turbulence. Heat transfer is increased on the plate in the region between the film cooling jets at all levels of blowing ratio for one percent free stream turbulence. This undesirable augmentation of the heat transfer is modeled analytically and related to the axial vortices generated near the film cooling jet inlets. The strength of these vortices and the subsequent heat transfer increases are related to the blowing ration.

French

Domaine(s)
  • Thermodynamique
  • Physique
DEF

Refroidissement d'une surface portée à très haute température (aube de turbine, tête de missile, etc.) par projection continue sur cette surface d'une couche mince de fluide réfrigérant.

OBS

L'emploi de ce terme est recommandé par le Ministère de la défense de la France.

Spanish

Save record 4

Record 5 1990-03-06

English

Subject field(s)
  • Aircraft Propulsion Systems
DEF

An arrangement in which the turbine extracts just sufficient energy from high pressure gas to drive the compressor and where the gases leaving the turbine will still be at a pressure above atmospheric and can be expanded in a propelling nozzle to produce a high velocity jet. [From The Aircraft Gas Turbine and its operation, 1974, p. 7].

CONT

Gas turbine engines for aircraft come in many types and sizes, each of which has its advantages and also its limitations. The most common type is the uncomplicated turbojet, similar to the typical jet engine described earlier. Because it has no added features such as a fan, propeller, of free turbine, this kind of turbojet is sometimes referred to as straight jet engine. [From Jet Engine Fundamentals, 1978, p. 44].

French

Domaine(s)
  • Propulsion des aéronefs
DEF

Réacteur simple-corps ne comprenant aucun dispositif supplémentaire comme le double-flux, l'hélice. L'effort de propulsion y est obtenu uniquement par la détente des gaz dans un seul étage de turbine qu'entraîne un compresseur monoétage.

CONT

Les avantages du double-flux résident essentiellement dans sa forte poussée et sa consommation spécifique plus faible que celle d'un réacteur pur ou propulseur à réaction directe. [Tiré de "Thermopropulsion" de L. Bale, 1974, p. 195].

Spanish

Save record 5

Record 6 1981-03-25

English

Subject field(s)
  • Mechanical Transmission Systems
OBS

Amplifier, the operating principle of which is based on the transition of a free laminar jet to turbulence by one or more input signals.

French

Domaine(s)
  • Transmissions mécaniques
OBS

Amplificateur dont le principe de fonctionnement est basé sur la commutation d'un jet libre laminaire en écoulement turbulent par l'action d'un ou plusieurs signaux d'entrée (de commande).

Spanish

Save record 6

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