Viscosity Measurement of Aviation Kerosene RP-3 Using a Double-Capillary Viscometer with Equal Mass Flow[J]. 2017, 51(3): 48-53.
DOI:
Viscosity Measurement of Aviation Kerosene RP-3 Using a Double-Capillary Viscometer with Equal Mass Flow[J]. 2017, 51(3): 48-53.DOI: 10.7652/xjtuxb201703009.
Viscosity Measurement of Aviation Kerosene RP-3 Using a Double-Capillary Viscometer with Equal Mass Flow
To measure the viscosity of the aviation kerosene RP-3
this paper proposed a new flow meter based on the double-capillary viscometer with the comparison calculation and the centrifugal effect due to coiling of the capillary being considered to revise the pressure drop of tested capillary. This calculation was applied to the measurement of viscosities of aviation kerosene at supercritical pressures up to 10 MPa and temperatures from 306.6 K to 673.5 K. The viscosity of the tested fluid is deduced through the measured relationship of the pressure drop between the upstream and downstream capillaries and the thermal expansion of the downstream capillary. The relative standard uncertainty of dynamic viscosity measurement is identified as 1.16%-2.92% within this paper's measuring range of temperatures. The n-dodecane and the binary mixtures of n-octane and n-heptane with a mass ratio of 1:1 were tested. The results showed a relative deviation within ±2.18% and an absolute average relative deviation below 0.74%. The viscosity of aviation kerosene RP-3 was measured on the basis of the calibration experiments at the pressures of 3
4 and 5 MPa and the temperatures from 306.6 K to 673.5 K. The method can be further extended for a larger temperature measurement range of the dynamic viscosity of aviation kerosene under supercritical pressures.
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