التركية - الإنجليزية
تعريف viskozite indeksi في التركية الإنجليزية القاموس.
- viscosity index
- empirical, unitless number indicating the effect of temperature change on the kinematic viscosity of an oil Liquids change viscosity with temperature, becoming less viscous when heated; the higher the VI of an oil, the lower its tendency to change viscosity with temperature The VI of an oil - with known viscosity at 40°C and at 100°C - is determined by comparing the oil with two standard oils having and arbitrary VI of 0 and 100, respectively, and both having the same viscosity at 100°C as the test oil The following formula is used , in accordance with test method ASTM D 2270
- A measure of an oil's ability to resist changes in viscosity when heated
- Is a measure of the rate of change of viscosity with temperature Oils with high VI have low viscosity changes (010)
- An empirical number indicating the effect of change in temperature on the viscosity of an oil A high viscosity index (VI) signifies a relatively small change of viscosity with temperature Ref ASTM D 2270-64
- A measurement of viscosity with a change of temperatures A low VI (example 60) will thin out a lot at high temperatures whereas, a VI of 95 or higher will thin out less Some high grade oils already have naturally occurring high VI's Other VI's can be controlled through refinery processes or VI Improvers can be added
- A commonly used measure of a fluid's change of viscosity with temperature The higher the viscosity index, the smaller the relative change in viscosity with temperature
viskozite indeksi
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vis·ko·zi·te in·dek·siResimler
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