In ground tests of hypersonic scramjet,the high-enthalpy airstream produced by burning hydrocarbon fuels often contains contaminants H2 O and CO2. The contaminants may cause the ignition characteristics of fuels to become discrepant between ground tests and real flights. In order to properly assess the influence of the contaminants on ignition characteristics of hydrocarbon fuels,the effects of H2 O and CO2 on ignition characteristics of RP-3 aviation kerosene were investigated in a preheated shock tube. To...