TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

KINETIC PRESSURE [12 records]

Record 1 2015-04-28

English

Subject field(s)
  • Atomic Physics
DEF

The density of kinetic energy due to the thermal motion of the particles composing the plasma.

OBS

For particles of a given type, the kinetic pressure is equal to the product nkT where n is the number density of the particles, k the Boltzmann constant and T the absolute temperature of the plasma.

OBS

kinetic pressure : term and definition standardized by ISO.

French

Domaine(s)
  • Physique atomique
DEF

Densité d'énergie cinétique due à l'agitation thermique des particules composant le plasma.

OBS

Pour des particules d'un type donné, la pression cinétique est égale au produit nkT où n est le nombre volumique de particules, k la constante de Boltzmann et T la température absolue du plasma.

OBS

pression cinétique : terme et définition normalisés par l'ISO.

Spanish

Save record 1

Record 2 2014-04-04

English

Subject field(s)
  • Fluid Mechanics and Hydraulics (Physics)
  • Hydrology and Hydrography
CONT

Bernoulli's theorem. How pressure and velocity interact... General concept : The Bernoulli effect is simply a result of the conservation of energy. The work done on a fluid(a fluid is a liquid or a gas), the pressure times the volume, is equal to the change in kinetic energy of the fluid.

French

Domaine(s)
  • Mécanique des fluides et hydraulique (Physique)
  • Hydrologie et hydrographie
OBS

Théorème relatif à l'écoulement des fluides.

Spanish

Campo(s) temático(s)
  • Mecánica de fluidos e hidráulica (Física)
  • Hidrología e hidrografía
DEF

En el flujo estacionario de un fluido perfecto incompresible, la suma de la presión y las energías cinética y potencial por unidad de volumen es la misma en cualquier punto de una línea de corriente.

Save record 2

Record 3 2013-12-10

English

Subject field(s)
  • Cooling and Ventilating Systems
CONT

Centrifugal fan impellers produce pressure from two related sources :(1) the centrifugal force created by rotating the air column enclosed between the blades, and(2) the kinetic energy imparted to the air by virtue of its velocity leaving the impeller. This velocity in turn is a combination of rotative velocity of the impeller and air speed relative to the impeller.

French

Domaine(s)
  • Systèmes de refroidissement et de ventilation
DEF

Partie tournante qui est essentiellement composée des pales, du moyeu, du disque arrière de roue et, éventuellement, du disque avant de roue.

CONT

On distingue trois catégories principales de roues centrifuges correspondant à l'angle fait par la tangente aux pales à leur périphérie avec un rayon; les sens par rapport à la rotation et la valeur de cet angle détermine l'allure des courbes de pression et de puissance en fonction du débit. Les roues à pales couchées en arrière ou à réaction [...] Les roues à pales radiales [...] Les roues à pales couchées en avant [...]

OBS

roue de ventilateur centrifuge : terme et définition normalisés par l’AFNOR; définition reproduite avec son autorisation.

Spanish

Save record 3

Record 4 2013-06-27

English

Subject field(s)
  • Mechanical Components
  • Wind Energy
DEF

A speed-up effect created by wind pressure in a natural corridor which allows a wind turbine to harness wind kinetic energy stronger than in the surrounding area.

CONT

Speed up effects: Tunnel effect. If you push an ordinary bicycle air pump, ... you will notice that the air leaving the nozzle moves much faster than the speed with which you are pushing. The reason, of course, is that the nozzle is much narrower than the cylinder in the pump. If you take a walk between tall buildings, or in a narrow mountain pass, you will notice that the same effect is working: the air becomes compressed on the windy side of the buildings or mountains, and its speed increases considerably between the obstacles to the wind. This is known as a "tunnel effect." So, even if the general wind speed in open terrain may be, say, 6 metres per second, it can easily reach 9 meters per second in a natural "tunnel". Placing a wind turbine in such a tunnel is one clever way of obtaining higher wind speeds than in the surrounding areas.

French

Domaine(s)
  • Composants mécaniques
  • Énergie éolienne
DEF

Effet accélérateur engendré par la compression du vent dans un couloir naturel et qui permet à l'éolienne qui y est installée de capter une énergie cinétique du vent supérieure à celle de la zone ambiante.

Spanish

Campo(s) temático(s)
  • Componentes mecánicos
  • Energía eólica
CONT

Efecto túnel. Si tomamos un camino entre dos edificios altos o en un paso estrecho entre montañas observaremos que el aire al pasar a su través se comprime en la parte de los edificios o de la montaña que está expuesta al viento, y su velocidad crece considerablemente entre los obstáculos del viento. Esto es lo que se conoce como efecto túnel.

Save record 4

Record 5 2013-06-25

English

Subject field(s)
  • Aerodynamics and Theory of Gases
  • Wind Energy
DEF

A speed-up effect caused by the pressure difference occurring across hills and ridges, allowing a wind turbine that is placed on top and facing the wind, to capture higher kinetic energy from the wind.

CONT

Speed Up Effects: Hill Effect. A common way of siting wind turbines is to place them on hills or ridges overlooking the surrounding landscape. In particular, it is always an advantage to have as wide a view as possible in the prevailing wind direction in the area. On hills, one may also experience that wind speeds are higher than in the surrounding area.

French

Domaine(s)
  • Théorie des gaz et aérodynamique
  • Énergie éolienne
DEF

[...] effet accélérateur engendré par la différence de pression existant de part et d'autre d'une colline, et qui permet à une éolienne placée en son sommet et face au vent de capter une énergie cinétique du vent plus élevée.

Spanish

Campo(s) temático(s)
  • Aerodinámica y teoría de los gases
  • Energía eólica
Save record 5

Record 6 2004-01-27

English

Subject field(s)
  • Spacecraft
CONT

A rocket engine is a device in which propellants are burned in a combustion chamber and the resulting high pressure gases are expanded through a specially shaped nozzle to produce thrust. The function of the nozzle is to convert the chemical-thermal energy generated in the combustion chamber into kinetic energy. The nozzle converts the slow moving, high pressure, high temperature gas in the combustion chamber into high velocity gas of lower pressure and temperature. Gas velocities from 2 to 4. 5 kilometers per second can be obtained in rocket nozzles. The nozzles which perform this feat are called DeLaval nozzles(after the inventor) and consist of a convergent and divergent section. The minimum flow area between the convergent and divergent section is called the nozzle throat. The flow area at the end of the divergent section is called the nozzle exit area.

French

Domaine(s)
  • Engins spatiaux
DEF

Partie d'une tuyère de section croissante, en aval du col, où se produit la détente du gaz.

OBS

Dans le divergent d'une tuyère à blocage sonique, la vitesse du gaz croît au-delà de la vitesse du son au col.

PHR

Partie supérieure du divergent.

Spanish

Save record 6

Record 7 1996-06-27

English

Subject field(s)
  • Technical Textiles
  • Chemistry
  • Anti-pollution Measures
  • Translation (General)
OBS

Kinetic... pertaining or relating to, motion; due to or resulting from motion... Chem. Of, pertaining to, or governed by the kinetics of a reaction... What may perhaps be called the kinetic theory of chemical actions, the theory, namely, that the direction and amount of any chemical change is conditioned not only by the affinities, but also by the masses of the reacting substances, by the temperature, pressure, etc.

French

Domaine(s)
  • Textiles techniques
  • Chimie
  • Mesures antipollution
  • Traduction (Généralités)
CONT

Le Textile Institute vient de publier, dans le cadre de sa série de monographies Textile Progress, un numéro (26-1 ) consacré aux tissus «barrière» pour la protection contre les aérosols. Les auteurs, après avoir décrit les caractéristiques, le comportement et la cinétique des particules en suspension dans les aérosols, font une revue de détails des mécanismes de capture et de rétention des particules par les médias filtrants [...] Enfin, les différentes théories proposées à ce jour visant à modéliser le comportement des particules contenues dans les aérosols sont passées en revue.

Spanish

Save record 7

Record 8 1993-09-09

English

Subject field(s)
  • Atomic Physics
DEF

The pressure which a magnetic field is capable of exerting upon a plasma.

CONT

... a key topic is the maximizing of the kinetic pressure of the tokamak plasma with respect to the magnetic-field pressure.

OBS

"Magnetic pressure" has been standardized by ISO.

French

Domaine(s)
  • Physique atomique
DEF

Terme utilisé pour désigner la force de confinement des plasmas par le champ magnétique.

OBS

Terme normalisé par l'ISO.

Spanish

Save record 8

Record 9 1992-12-10

English

Subject field(s)
  • Fluid Mechanics and Hydraulics (Physics)
DEF

The square of the speed of flow of a fluid divided by twice the acceleration of gravity.

OBS

It is equal to the static pressure head corresponding to a pressure equal to the kinetic energy of the fluid per unit volume.

French

Domaine(s)
  • Mécanique des fluides et hydraulique (Physique)
DEF

Hauteur de fluide que produirait statiquement la pression d'un fluide.

DEF

Charge due à une vitesse et égale à V²/2g.

Spanish

Save record 9

Record 10 1986-06-25

English

Subject field(s)
  • Thermodynamics
  • Turbines
CONT

If flashing is allowed to take place by simply admitting boiling water into a flash vessel at a lower pressure, the operation passes momentarily through an isentropic stage in which the heat energy of the boiling water is at first converted into kinetic energy.

French

Domaine(s)
  • Thermodynamique
  • Turbines

Spanish

Save record 10

Record 11 1985-09-20

English

Subject field(s)
  • General Mechanics (Physics)
  • Energy Transformation
  • Centrifugal Pumps
CONT

Diffuser : a chamber surrounding the impeller of a centrifugal pump in which part of the kinetic energy of the fluid is converted to pressure energy by a gradual increase in the cross-sectional area of the flow.

French

Domaine(s)
  • Mécanique générale (Physique)
  • Transformation de l'énergie
  • Pompes centrifuges
CONT

Le diffuseur et le redresseur à ailettes, la volute, ont pour but d'effectuer la transformation de l'énergie cinétique contenue dans le fluide sortant de la roue en énergie de pression [...]

Spanish

Save record 11

Record 12 1985-08-12

English

Subject field(s)
  • Energy Transformation
  • Thermonuclear fusion
  • Atomic Physics
DEF

Plasma confinement in which the kinetic pressure of the hot plasma is balanced not by magnetic pressure as in a magnetic confinement, but by the pressure of a surrounding cold gas.

French

Domaine(s)
  • Transformation de l'énergie
  • Fusion thermonucléaire
  • Physique atomique

Spanish

Save record 12

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