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Cavitation threshold
| Глоссарий терминов по акустике |
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Порог кавитации, русский
Порог кавитации [интенсивность звукового поля, при которой начинается кавитация, характеризующаяся возрастанием акустических потерь, нелинейных искажений, появлением шума кавитации]
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Cavitating disk device, английский
Дисковое устройство для испытания на кавитацию (состоит из диска с отверстиями, быстро вращающегося в жидкости и создающего коллапсирующие пузырьки, которые воздействуют на помещенные в устройстве опытные образцы)
Cavitation, английский
- Кавитация - явление, возникающее на плавнике на очень большой скорости (срыв потока), за чем неизбежен спин-аут (spin out)
- Formation of an air or vapor pocket (or bubble) due to lowering of pressure in a liquid, often as a result of a solid body, such as a propeller or piston, moving through the liquid; also, the pitting or wearing away of a solid surface as a result of the violent collapse of a vapor bubble. cavitation can occur in a hydraulic system as a result of low fluid levels that draw air into the fluid, producing tiny bubbles that expand followed by rapid implosion, causing metal erosion and eventual pump destruction.
- Кавитация
- Кавитация, образование пустот
- A phenomenon in the flow of water consisting in the formation and the collapse of cavities in water.
- The forming of a cavity
- The formation and collapse of air bubbles created by a ship’s propeller. this reduces effective thrust, creates noise detectible by an enemy, and may cause structural damage.
- The formation of a pocket (bubble) of air or vapor in a liquid, typically resulting from the swift movement of a solid object (such as a propeller or piston) through the liquid. also, the pitting and wearing away of metal or other solid surfaces caused by the collapse of air/vapor pockets in surrounding liquid.
- Describes the continous pumping of mud from surface-level mud tanks, down the drill pipe, out the drill bit nozzles, and through the gap between the drill pipe and the borehole to the surface. this movement carries rock cuttings via the shale shaker to the mud system.
Cavitation (hydraulics), английский
When the absolute pressure in a pump intake line is reduced below the vapor pressure of the liquid, the fluid may vaporize, or “boil”, or the dissolved air in the fluid may separate. in either case, as the bubbles go through the pump, they collapse or implode and damage the metal of the pump.
Cavitation bound a ry, английский
Граница кавитации 8 . cav i ta t i on wear кавитационное изнашива- ние
Cavitation cloud, английский
Кавитационное облако (скопление большого числа кавитационных пузырьков, затемняющих эродируемую поверхность при наблюдении за ней)
Cavitation corrosion, английский
Cavitation damage, английский
The pitting of concrete caused by implosion (collapse) of bubbles in flowing water.
Cavitation erosion, английский
- A material-damaging process which occurs as a result of vaporous cavitation. "cavitation" refers to the occurrence or formation of gas- or vapor- filled pockets in flowing liquids due to the hydrodynamic generation of low pressure (below atmospheric pressure). this damage results from the hammering action when cavitation bubbles implode in the flow stream. ultra-high pressures caused by the collapse of the vapor bubbles produce deformation, material failure and, finally, erosion of the surfaces.
- Loss of material due to the repeated formation and collapse of bubbles at the surface of an object in contact with a rapidly flowing liquid. glossary c 493 celsius (centigrade): temperature scale based on 273 k (0 °c = +32 °f) as the freezing point of water and 373 k (100 °c = 212 °f) as the boiling point of water at standard atmospheric pressure. a relative scale related to the kelvin scale (0 °c = 273.12 k; 1 °c = 1 k).
Cavitation errosion, английский
Loss of material due to the repeated formation and collapse of bubbles at the surface of an object in contact with a rapidly flowing liquid. ccd: see charge coupled device. celsius (centigrade): temperature scale based on 273 k (0 °c = +32 °f) as the freezing point of water and 373 k (100 °c = 212 °f) as the boiling point of water at standard atmospheric pressure. a relative scale related to the kelvin scale (0 °c = 273.12 k; 1 °c = 1 k).
Cavitation fatigue, английский
Form of pitting, caused by erosion from vibration and movement in liquid environments. ccd: see charge coupled device.
Cavitation flow, английский
Cavitation influence, английский
Влияние кавитации
Cavitation liposuction, английский
Cavitation noise, английский
Кавитационный шум
Cavitation nuclei, английский
Cavitation number, английский
Число кавитации
Cavitation performance of pump, английский
Кавитационная характеристика насоса
Cavitation resistance, английский
Стойкость к кавитации
Cavitations, английский
The number of molding stations within a mold.
Threshold, английский
- Seuil
- The smallest input value to a sensor which will cause the sensor to respond. commonly used with mechanical wind sensors to describe the wind speed necessary to cause the anemometer and wind vane to turn.
- The bottom metal or wood plate of an exterior door frame. generally they are adjustable to keep a tight fit with the door slab.
- Порог, точка, в которой процесс начинается или изменяется. пороговые установки при сканировании черно-белых изображений определяют, какие пикселы должны быть сконвертированы в черные, а какие с в белые. в нерезком маскировании порог определяет, каким долж
- Порог; пороговое значении
- Порог; входная кромка впп
- A defined pass or fail value, i.e., the maximum or minimum value of insertion loss in db or dbm
- The input level at which lasing begins during excitation of the laser medium.
- Лимит, предел
- 1. the point at which something starts, e.g. where something can be perceived by the body or where a drug starts to have an effect she has a low hearing threshold. 2. the point at which a sensation is strong enough to be sensed by the sensory nerves ‘…if intracranial pressure rises above the treatment threshold, it is imperative first to validate the reading and then to eliminate any factors exacerbating the rise in pressure’ [british journal of hospital medicine]
- Порог; пороговая величина; предел
- The beginning of the part of the runway usable for landing
- Порог. характерный признак, значимая величина, уровень или предел, при которых начинает происходить или возникать некое событие. см. cut-off concentration (критическая концентрация).
- Порог. см. nuisance threshold; odour threshold — порог вредного (нежелательного) воздействия; порог ощущения запаха. •...¦`" --¦:.
- In a compressor or limiter, the input level above which compression or limiting takes place. therefore the level of the audio must be above the threshold setting, or no effect is heard. in an expander or gate, the input level below which expansion or gating occurs.
- A filter effect in windows movie maker.
- A limit against which other values can be compared. when a value crosses this limit, it can trigger an alert or other action.
- Порог. характерный признак, значимая величина, уровень или предел, при которых начинает происходить или возникать некое событие. см. cutoff concentration (критическая концентрация).
- Порог
- Since color in the scanned images of colored documents is rarely even, a threshold value is often needed when defining colors for individual fields. the threshold value determines the size of the range of colors that entrance will accept in relation to the reference color. on a scale of 0-100, a value of zero will only accept exact matches of the reference color, whereas with a value of 100, will include a much broader range of colors. the default value is 50 and is sufficient in most situations.
- In reference to currents or magnetic fields, the minimum strength necessary to create a lookedfor effect is called the threshold value. for example, the minimum current necessary to produce a readable indication at a given defect, is the threshold value of current for that purpose.
- A value in a phenomenon where a large change of output occurs.
- Setting of an instrument that causes it to register only those changes in response greater or less than a specified magnitude.4 see adaptive thresholding, resolution threshold.
- Voltage level setting of an instrument that causes it to register only signals greater or less than a specified magnitude.10,20 this threshold may be adjustable, fixed or floating.16 through-transmission technique: test technique in which ultrasonic energy is transmitted through the test object and received by a second transducer on the opposite side. changes in received signal amplitude are taken as indications of variations in material continuity.7
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Central hearing loss, английский
Потеря слуха в результате мозговых нарушений 2 36."central spectrum" "центральный спектр* [спектр сложных тонов, создаваемый центральным процессором при бинауральном слушании]
Cavitation nuclei, английский
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