| Citation: | Tang Rui, Min Ming, Zhu Deyong. Experimental study on low-temperature fuel characteristics of pressure-swirl atomizer[J]. Journal of Aerospace Power, 2026, 41（X）：20250265 doi: 10.13224/j.cnki.jasp.20250265
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An experimental system was built to study the effects of RP-3 and RP-5 fuels at different fuel temperatures on the flow rate characteristics, cone angle, Sauter mean diameter (SMD) and droplet size distribution. The results showed that under the same fuel pressure, as the fuel temperature decreased from 20 ℃ to −30 ℃, the density, kinematic viscosity, and surface tension of RP-3 and RP-5 fuels increased, and the flow rate also increased. The flow rate of RP-5 fuel was 2% to 4% higher than that of RP-3; the cone angle decreased by 14% for RP-3 fuel and 23% for RP-5 fuel; as SMD increased, the droplet size distribution index first decreased and then increased, indicating that the decrease in fuel temperature led to an increase in the average droplet size, but the unevenness of droplet size decreased and the droplet size distribution became more concentrated.
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