Properties of Aviation Kerosene/Pentacyclo[5.4.0.0~(2,6).0~(3,10).0~(5,9)]undecane Blending Fuel

Pentacyclo[5.4.0.0~(2.6).0~(3,6).0~(3,10).0~(5,9)]undecane(PCU) is a compound with potential application in high energy density caged hydrocarbon compounds.PCU as a high-energy additive can enhance the energy level of the liquid hydrocarbon fuel.The results show PCU has a combustion heat 44.5 MJ · kg~(-1) and is insensitive to impact and friction.The physico-chemical properties of blending fuel which is composed of aviation kerosene RP-3 and PCU were studied.Results show that the saturated solution of mass fraction of PCU in kerosene RP-3 at 25 ℃ reaches 44.6%.When mass fraction of PCU in the blending fuel reaches 25%,in comparison with pure aviation kerosene RP-3,the density and volumetric heat content of the blending fuel increase by 7.8%and 9.5%,respectively,the flash point of the blending fuel increases from 48 ℃ to 49 ℃,and the freezing point of the blending fuel decreases from-59 ℃ to-62 ℃.The viscosity of the blending fuel at-40 ℃,is between 6.99 mm~2 · s~(-1) and 13.64 mm~2 · s~(-1).The blending fuel with 10%PCU can perform smooth ignition and stable combustion on a scram jet direct-connect test facility.PCU makes the supersonic combustion pressure of aviation kerosene RP-3 increase from 327 kPa to 339 kPa.