Переводчик
Термины и определения
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71Viscosity index
— An empiric number measured by comparing an oil with a standard one.
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72Viscosity manometer
— A pressure gauge which uses the variations of viscosity of a gas with pressure (in vacuum techniques).
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73Viscous filter
— Air filter in which the filter medium is formed from materials which have been impregnated with a viscous oil.
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74Viscous flow
— a) A term sometimes used to describe laminar flow or streamline flow. b) A type of gas flow where the average free path or gas molecules is much smaller than the smallest cross-sectional dimension of the pipe conveying the substance (continuum-regime).
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75Vitreous enamel
— A vitreous coating which is applied to metal surfaces by firing in an enamelling kiln.
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76Volume flow rate
— Volume of matter that flows per unit time.
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77Volumetric efficiency
— The ratio of volume induced, at suction conditions, by a compressor in a given time to the swept volume as measured over the same time.
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78Volute
— That part of the casing of a centrifugal fan or compressor which receives fluid thrown out from the impeller or diffuser.
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79Vortex tube
— Used to produce cooling effect by Ranque-Hilsch effect.