Density measurements of aviation kerosene RP-3 over temperature range from 323 K to 783 K under supercritical pressures from 6 MPa to 8 MPa

Aviation kerosene RP-3 is extensively used in China. This paper details the measurement of the density of Chinese aviation kerosene RP-3 employing the flow method under high-pressure and high-temperature conditions. The methodology utilizes circular tubes with two different diameters. The density of aviation kerosene RP-3 was experimentally measured for the first time within a pressure range from 6 MPa to 8 MPa and a temperature range from 323 K to 783 K, with a maximum relative uncertainty of 0.35%. The experimental setup used n-decane for calibration, achieving an average calibration error of 0.91%. The data indicate that the density of RP-3 ranges from 764 kg/m³ to 247 kg/m³ under the tested conditions. The results show that the density of kerosene RP-3 decreases with an increase in temperature at a constant pressure, and at a given temperature, a higher pressure results in a higher density. Polynomial fitting was applied to the data, resulting in the average absolute deviation of 1.09%, 0.80%, and 0.76% at different pressures of 6, 7, and 8 MPa, respectively.