Fuels are mixtures of many hydrocarbons compounds that meet general physical property specifications. JP-8 is made up of hundreds of aliphatic and aromatic hydrocarbon compounds. The major components are straight chain paraffins, branched chain paraffins, cycloparaffins, aromatics, and alkenes. The concentration of paraffins is on the average 60 % by volume, that of cycloparaffins 20%, that of aromatics 18 %, and that of alkenes 2 %. This is similar to hydrocarbon class distribution in Jet-A. The combustion characteristics of many components in JP-8 are not known. The approach employed in this research is to first develop surrogates for JP-8. A surrogate fuel is a mixture of several hydrocarbon compounds. In general two types of surrogates are defined: physical surrogate and chemical surrogate. Physical surrogates are mixtures that have generally the same physical properties of JP-8. Physical surrogates are unlikely to reproduce aspects of combustion of JP-8. Chemical surrogates are mixtures that have generally the same chemical-class composition and average molecular weight as JP-8. In general chemical surrogates are designed to reproduce aspects of combustion of JP-8. This research is focused on developing chemical surrogates that accurately reproduce autoignition and extinction characteristics of JP-8 and in nonpremixed systems.