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The lack of aromatic and cyclo-paraffin components in aviation alternative fuels such as hydrotreated biofuels due to different production processes may have influences on fuel performances. This work investigated the effects of aromatic and cyclo-paraffin components on physical properties and spray performances of Chinese jet fuel RP-3. Macroscopic spray performances such as spray cone angle and liquid length were measured downstream a pressure swirl nozzle at injection pressures of 0.3, 0.5, 0.7 and 0.9MPa. The experimental data obtained in this work show that the influence of different kinds of aromatic and cyclo-paraffin on the physical properties of RP-3 is mainly reflected in the kinematic viscosity, which further affects the spray performances. However, under the operating pressure of the nozzle, the effect of various aromatics and cyclo-paraffins added at 10% blending ratio on the fuel performance is very small. This work will be helpful for developing “drop-in” aviation alternative fuels. Keywords—component; spray; cone angle; liquid length

Effects of Aromatic and Cyclo-paraffin on Spray Cone Angle and Liquid Length