TERMIUM Plus®

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

DOWNSTREAM PRESSURE [25 records]

Record 1 2017-07-04

English

Subject field(s)
  • Fluid Mechanics and Hydraulics (Physics)
  • Propulsion of Water-Craft
CONT

Bubble cavitation occurs in propellers which have aerofoil sections not specifically designed for a uniform pressure distribution over the back. Bubbles are formed just upstream of the position of maximum thickness where the pressure falls close to the vapour pressure, grow larger as they move downstream, and collapse violently shortly after they reach the point where the pressure rise above the vapour pressure.

French

Domaine(s)
  • Mécanique des fluides et hydraulique (Physique)
  • Propulsion des bateaux

Spanish

Save record 1

Record 2 2017-03-10

English

Subject field(s)
  • Technical Textiles
  • Supports and Reinforcement (Construction)
  • Civil Engineering
  • Soil Mechanics (Engineering)
CONT

Complete Fabric Retaining Walls. A fabric retaining wall consists of horizontal layers of fabric-containing earth fill with one side of the fabric folded back around the exposed edge and lapped over the next layer to form the wall face ... . At the face of the wall the fabric retains the soil from spilling out, while in the interior of the fill fabric tensile stress is developed, which stabilizes the mass.

CONT

Fabric Earth dams. While this application is similar in concept and construction method to fabric retaining walls, the hydrostatic pressure of the retained water and the potential scour problem make the application somewhat unique. Kern describes an application of this type in France where a fabric wall with a vertical downstream face was constructed... the upstream slope is 2 : 1. The fabric used was a woven polyester filled with a loam soil.

French

Domaine(s)
  • Textiles techniques
  • Étayage et consolidation (Construction)
  • Génie civil
  • Mécanique des sols
OBS

Soutènements. Talus renforcés [...] Mise en œuvre du matériau d'apport : le matériau d'apport doit être mis en œuvre par couches, d'épaisseur adaptée à l'entraxe des nappes géotextiles [...] Chaque couche devra être soigneusement compactée afin de limiter au minimum les déformations du massif. L'exécution classique d'un talus renforcé par des géotextiles exige l'utilisation d'un coffrage mobile que l'on déplace au fur et à mesure de d'édification de l'ouvrage.

OBS

Même si l'expérience montre que, dans la majorité des cas, les ouvrages classiques comportant des géotextiles (voies de circulation, tranchées drainantes, protection de berges, etc.) se comportent bien, il est d'autres constructions qui exigent une surveillance plus étroite, en raison d'une plus grande sollicitation mécanique ou hydraulique du géotextile (ouvrages de soutènement, drain-cheminée dans les digues, etc.).

Spanish

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Record 3 2016-12-23

English

Subject field(s)
  • Areal Planning (Urban Studies)
  • Urban Development
DEF

A growth area that is intended to provide an alternative attractive power to a major urban centre, and hence assist in controlling its growth.

CONT

Planners contemplate the development of countermagnet centers, such as the projected satellite part 70 miles downstream at Haldia, to draw population pressure from the center.

Key term(s)
  • countermagnet centre

French

Domaine(s)
  • Aménagement du territoire
  • Développement urbain
CONT

Métropoles d'équilibre : grandes villes de province que l'État s'efforce de développer pour qu'elles deviennent des centres d'attraction économique capables de fixer la main-d'œuvre et de faire équilibre au développement excessif de Paris.

CONT

La ville satellite ne résout pas le problème [de] l'extension [ce qui implique la restructuration des noyaux anciens des zones d'habitat dispersé] la politique des noyaux restructurateurs exige des investissements importants

OBS

Pôle de croissance dont l'objet est de faire contrepoids à l'attrait exercé par un grand centre urbain.

Spanish

Save record 3

Record 4 2016-06-16

English

Subject field(s)
  • Pipes and Fittings
  • Closing Devices and Nozzles (Mechanical Components)
CONT

The pressure-type vacuum breaker has a spring-loaded valve that normally allows water to flow right through and normally is not open to the atmosphere. If the pressure in the line drops, a spring-loaded valve allows air into the piping downstream of the breaker and shuts off the pipe upstream of the breaker...

Key term(s)
  • pressure-type vacuum breaker

French

Domaine(s)
  • Tuyauterie et raccords
  • Obturateurs et buses (Composants mécaniques)
CONT

Le brise-vide de type à pression est conçu pour fonctionner constamment sous pression. [...] Le brise-vide à pression doit être conçu pour qu'un effort suffisant soit exercé à l'ouverture de manière à compenser toute tendance du siège à gripper après une longue période en position de fermeture, dans des conditions de pression positive. Il existe en deux types fondamentaux : a) le type à obturateur (flotteur) conique ou sphérique à action directe - avec ressort pour aider à l'ouverture. b) le type à membrane - la membrane exerce l'effort nécessaire à l'ouverture.

Key term(s)
  • casse-vide de type à pression
  • brise-vide de type à pression

Spanish

Save record 4

Record 5 2016-03-30

English

Subject field(s)
  • Closing Devices and Nozzles (Mechanical Components)
  • Gas Industry
DEF

A device used to reduce gas pressure immediately downstream of its installed position.

OBS

It has the ability to maintain a near constant outlet pressure within its design parameters regardless of changes in pressure or flow in other parts of the system.

OBS

pressure reducer: term and definition standardized by ISO in 2014.

French

Domaine(s)
  • Obturateurs et buses (Composants mécaniques)
  • Industrie du gaz
DEF

Appareil utilisé pour réduire la pression de gaz immédiatement en aval de la position où il est installé.

OBS

L’appareil permet de maintenir la pression de sortie presque constante à l’intérieur de ses paramètres de conception, indépendamment des fluctuations de pression ou de débit dans d’autres parties du système.

OBS

détendeur : terme et définition normalisés par l'ISO en 2014.

Spanish

Save record 5

Record 6 2016-02-29

English

Subject field(s)
  • Wastewater Treatment
CONT

The pumps must therefore be suitably designed, and the protection, which concerns only the parts of the system downstream of the pumps, will take the form of very rapid filtration through flint, straining under pressure of the use of hydrocyclones if the sand is of the right grain size.

French

Domaine(s)
  • Traitement des eaux usées
CONT

Les pompes doivent être adaptées en conséquence, et la protection, qui ne peut concerner que le réseau en aval de celles-ci, sera réalisée par une filtration très rapide sur silex, un tamisage sous pression, ou, si la granulométrie du sable le permet, par un cyclonage.

Spanish

Save record 6

Record 7 2016-02-25

English

Subject field(s)
  • Hydrology and Hydrography
  • Speleology
CONT

The modified pitot tube known as a pitometer has one pressure opening facing upstream and the other facing downstream. The differential between the two openings is usually for 25 to 50 per cent more than that for a standard pitot tube.

French

Domaine(s)
  • Hydrologie et hydrographie
  • Spéléologie

Spanish

Campo(s) temático(s)
  • Hidrología e hidrografía
  • Espeleología
Save record 7

Record 8 2014-02-20

English

Subject field(s)
  • Wind Energy
CONT

Actuator disk theory. The simplest model of a horizontal axis wind turbine(HAWT) is one in which the turbine rotor is replaced by an actuator disk which removes energy from the wind. As the wind strikes the actuator disk on the upwind side, the pressure rises there, and the wind is deflected away from the disk, causing a large wake downstream of the disk. Actuator disk theory relates the pressure drop across the disk to the change in wake size and the energy which can be extracted from the wind.

French

Domaine(s)
  • Énergie éolienne
DEF

Concept utilisé en dynamique des fluides afin d'évaluer notamment le rendement du rotor d'une éolienne à axe horizontal, en remplaçant ce dernier par un disque actuateur pour extraire l'énergie du vent.

Spanish

Campo(s) temático(s)
  • Energía eólica
Save record 8

Record 9 2011-01-11

English

Subject field(s)
  • Biological Sciences
DEF

Device enabling a larger surface area to be obtained without making large and unwieldy stacks of flat membrane. One only has to mould the membrane into a tube and then incorporate a number of such membrane tubes into a cartridge; liquid can then be recirculated through the cartridge and sufficient pressure for ultra-filtration obtained by restricting the flow downstream of the cartridge. In some systems the membrane may be moulded round a plastic rod which is grooved to produce a thin channel effect; it has been suggested that this is more efficient in reducing concentration polarization than a hollow membrane tube. The cartridge system has been used in various large-scale units with membrane areas of up to several square feet.

OBS

Molecular weight cut-off range from 500 to 300,000.

French

Domaine(s)
  • Sciences biologiques
CONT

On préfère généralement installer un filtre par fermenteur plutôt que de filtrer dans une seule unité tout l'air distribué ensuite sur l'ensemble de l'atelier de fermentation. Ces filtres, ainsi que différents matériels de préfiltration, sont distribués par PALL-FRANCE. [...] D'autres firmes [...] proposent des cartouches à membranes plissées de ce type.

Spanish

Save record 9

Record 10 2010-07-27

English

Subject field(s)
  • Fire-Fighting and Rescue Equipment
  • Extinguishing Agents
CONT

Around-the-pump proportioner : This type of proportioner also operates on the venturi principle [as does the "in-line inductor"], except that it must be situated at the pump and connected to both suction and pressure sides. Its advantage is that pressure recovery of the venturi action is attained, and pump delivery pressures to the foam-making device or devices downstream require no compensation for pressure loss except for that in the layout hose length.... A small portion of the pump discharge flows through a bypass line to the suction side of the pump. A venturi eductor in this line produces a negative pressure on the foam concentrate pickup line from the foam concentrate container. Foam concentrate is led to the eductor where it mixes with water and is delivered to the suction side of the pump.

Key term(s)
  • foam concentrate pickup tube
  • foam concentrate pick-up line
  • eductor pick-up tube

French

Domaine(s)
  • Matériel de secours et de lutte (incendies)
  • Agents extincteurs
OBS

tube plongeur : proposition confirmée par le Centre de secours de l'Association nationale des sapeurs pompiers volontaires, en France.

Spanish

Save record 10

Record 11 2008-11-06

English

Subject field(s)
  • Control Instrumentation (Mechanical Components)
  • Aircraft Systems
DEF

A pressure operated hydraulic cylinder used as a safety block for the main hydraulic system pressure in the event that a hydraulic hose or line should rupture downstream of the cylinder.

Key term(s)
  • lock-out actuator
  • lock out actuator
  • lockram
  • lock out cylinder

French

Domaine(s)
  • Dispositifs de commande (Composants mécaniques)
  • Circuits des aéronefs
OBS

vérin de blocage : terme uniformisé par les Comités d'uniformisation de la terminologie aéronautique (CUTA) Maintenance et Opérations aériennes.

Spanish

Save record 11

Record 12 2008-03-10

English

Subject field(s)
  • Aeronautical Engineering and Maintenance
PHR

Downstream pressure.

French

Domaine(s)
  • Aérotechnique et maintenance
OBS

en aval : terme uniformisé par les Comités d'uniformisation de la terminologie aéronautique (CUTA) - Maintenance et Opérations aériennes.

PHR

Pression aval.

Spanish

Save record 12

Record 13 2008-02-06

English

Subject field(s)
  • Closing Devices and Nozzles (Mechanical Components)
  • Aircraft Systems
CONT

An overflow valve works by sensing the pressure up pipe from itself. The valve has a specified pressure level, which it maintains by use of a coil spring mechanism, which opens when the inlet, or downstream pressure, begins to rise while the upstream pressure goes down. In an emergency situation in which the inlet pressure is too high, some overflow valves are designed to alert operators, while others may fail.

French

Domaine(s)
  • Obturateurs et buses (Composants mécaniques)
  • Circuits des aéronefs
OBS

clapet de trop-plein; robinet de trop plein : termes uniformisés par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Maintenance.

Spanish

Save record 13

Record 14 2002-11-13

English

Subject field(s)
  • Heat Treatment: Intervening Factors (Metals)
  • Thermoelectricity and Thermoelectronics
CONT

The new 60-megawatt segmented arc heater, known as H3, significantly improves AEDC' s [Arnold Engineering Development Center] present arc capabilities... Arc heaters such as H3 produce the high pressures and heat fluxes required for testing thermal protection materials used for nose tips and heat shields. Arc heater tests provide information to manufacturers about the probable condition a space vehicle component would experience following re-entry into Earth's atmosphere. An arc heater is basically a large tube that high-pressure air runs through. The air is heated by discharging tens of megawatts of power using an electric arc similar to a lightning bolt. At the nozzle, or downstream end of the heater, test personnel install models or materials and subject them to simulated high pressure and temperature conditions generated by the bolt. Temperatures range from 5, 000 to 15, 000 degrees Fahrenheit, requiring each component to be water-cooled.

French

Domaine(s)
  • Traitement thermique des métaux (Facteurs)
  • Thermoélectrique et thermoélectronique

Spanish

Save record 14

Record 15 2002-03-08

English

Subject field(s)
  • Fire-Fighting and Rescue Equipment
  • Extinguishing Agents
DEF

A type of liquid foam concentrate proportioning device that feeds the concentrate into the water at the output side of the pump rather than through the pump.

CONT

Balanced-pressure proportioners and around-the-pump proportioners are both systems that are built into the apparatus fire pump. ... The around-the-pump proportioning system consists of a pickup line on the discharge side of the pump back to the intake side of the pump. An in-line eductor is positioned on this pump bypass. These units are rated for a specific flow and should be used at this rate, although they do have some flexibility. For example, a unit designed to flow 500 gpm (2,000 L/min) at a 6 percent concentration will flow 1,000 gpm (4,000 L/min) at a 3 percent rate.

CONT

Around-the-pump proportioner : This type of proportioner also operates on the venturi principle [as does the "in-line inductor"], except that it must be situated at the pump and connected to both suction and pressure sides. Its advantage is that pressure recovery of the venturi action is attained, and pump delivery pressures to the foam-making device or devices downstream require no compensation for pressure loss except for that in the layout hose length.... A small portion of the pump discharge flows through a bypass line to the suction side of the pump. A venturi eductor in this line produces a negative pressure on the foam concentrate pickup line from the foam concentrate container. Foam concentrate is led to the eductor where it mixes with water and is delivered to the suction side of the pump.

Key term(s)
  • around the pump proportioner
  • around the pump inductor
  • around the pump proportioning system

French

Domaine(s)
  • Matériel de secours et de lutte (incendies)
  • Agents extincteurs

Spanish

Save record 15

Record 16 2000-06-20

English

Subject field(s)
  • Fluid Mechanics and Hydraulics (Physics)
  • Closing Devices and Nozzles (Mechanical Components)
DEF

The maximum pressure drop allowable to ensure noise-free operation and minimum valve wear.

OBS

Critical pressure drop (equal to ½ to absolute upstream pressure).

OBS

Pressure drop(h) is the difference between the upstream pressure and the downstream pressure of a fluid passing through a valve.

French

Domaine(s)
  • Mécanique des fluides et hydraulique (Physique)
  • Obturateurs et buses (Composants mécaniques)
OBS

chute de pression. Diminution brusque de pression dans un fluide en mouvement.

Spanish

Save record 16

Record 17 2000-05-10

English

Subject field(s)
  • Metering Instruments
  • Oil and Gas Distribution Facilities
DEF

A tap for pressure connections made at points two-and-a-half pipe diameters upstream and downstream from the orifice; a full-flow connection.

French

Domaine(s)
  • Compteurs de consommation et débitmètres
  • Install. de distrib. (Pétrole et gaz naturel)

Spanish

Save record 17

Record 18 1998-09-16

English

Subject field(s)
  • Mechanical Transmission Systems
DEF

Value of the absolute upstream and downstream pressure ratio in a pneumatic device, while the flow becomes sonic.

French

Domaine(s)
  • Transmissions mécaniques
DEF

Valeur de rapport des pressions absolues amont et aval dans un appareil pneumatique, lorsque l'écoulement devient sonique.

Spanish

Save record 18

Record 19 1990-12-30

English

Subject field(s)
  • Cooling and Ventilating Systems
DEF

A vane fitted upstream or downstream to the turbine or impeller of a fan in order to recover a part of the energy of the tangentially accelerated air; these vanes can be adjustable and used for controlling flow rate and pressure.

French

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

Aube montée en amont, ou en aval de la roue d'un ventilateur, pour en améliorer le rendement; ces aubes, si elles sont réglables en position, permettant de modifier débit et pression du ventilateur.

Spanish

Save record 19

Record 20 1990-06-12

English

Subject field(s)
  • Burners and Steamfitting
CONT

The pressure atomizing induced draft burner uses the same type of oil pump, nozzle, and ignition system as the high pressure atomizing gun burner. The basic difference in construction, as compared to the gun burner, is the location of the burner fan downstream of the combustion chamber.

OBS

Residential Oil Burners.

OBS

Commercial-industrial oil burners. ... Pressure atomizing burners are designated commercially as forced draft or natural (or induced) draft burners.

French

Domaine(s)
  • Fumisterie et brûleurs
OBS

Brûleurs à pulvérisation mécanique par pression. Dans ces dispositifs, le combustible liquide comprimé par une pompe est dirigé par un éjecteur, dont la forme provoque sa division et sa pulvérisation. (...) l'air de combustion peut être apporté par tirage naturel ou par air soufflé.

Spanish

Save record 20

Record 21 1988-11-07

English

Subject field(s)
  • Control Instrumentation (Mechanical Components)
  • Mechanical Components
CONT

In the normally closed mode, the supply air is stopped but the outlet is connected through to the third port, to allow downstream air to exhaust through the valve. Actuation of the valve connects the pressure inlet to [its port connection], shutting off the exhaust port.

OBS

This term is used in pneumatic technology.

French

Domaine(s)
  • Dispositifs de commande (Composants mécaniques)
  • Composants mécaniques
CONT

Notons une difficulté de vocabulaire: les appellations "normalement fermé" et "normalement ouvert" sont utilisées pour les contacts électriques et pour les vannes pneumatiques. Cependant, elles correspondent à des fonctions différentes: une vanne "normalement fermée" établit un circuit lorsqu'elle est actionnée (...)

OBS

On utilise ce terme dans le domaine de la pneumatique.

Spanish

Save record 21

Record 22 1986-06-25

English

Subject field(s)
  • Machinery
  • Geophysics
CONT

The throttling device R must be designed so as to restrict the steam flow as soon as the downstream pressure rises above a predetermined(and adjustable) level. With a turbine this can quite simply be incorporated with the governing gear....

French

Domaine(s)
  • Machines
  • Géophysique

Spanish

Save record 22

Record 23 1981-08-24

English

Subject field(s)
  • Hydrology and Hydrography
  • Scientific Measurements and Analyses
OBS

A nappe springing clear of the downstream face of the weir and forming a pocket in which atmospheric pressure is maintained.

French

Domaine(s)
  • Hydrologie et hydrographie
  • Mesures et analyse (Sciences)
OBS

Nappe jaillissant de la face aval du déversoir et formant une poche dans laquelle la pression atmosphérique est maintenue.

Spanish

Save record 23

Record 24 1981-04-01

English

Subject field(s)
  • General Scientific and Technical Vocabulary
  • Water Treatment (Water Supply)
CONT

The pumps must therefore be suitably designed, and the protection, which concerns only the parts of the system downstream of the pumps, will take the form of very rapid filtration through flint, straining under pressure or the use of hydrocyclones if the sand is of the right grain size.

French

Domaine(s)
  • Vocabulaire technique et scientifique général
  • Traitement des eaux
CONT

Les pompes doivent être adaptées en conséquence, et la protection, qui ne peut concerner que le réseau en aval de celles-ci, sera réalisée par une filtration très rapide sur silex, un tamisage sous pression, ou, si la granulométrie du sable le permet, par un cyclonage.

Spanish

Save record 24

Record 25 1976-06-19

English

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

French

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

Spanish

Save record 25

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