Shock-tube investigation of self-ignition of n-heptane-air mixtures under engine relevant conditions

To determine self-ignition characteristics under conditions relevant to piston engines combustion, n-heptane-air mixtures have been investigated in a high-pressure shock tube without use of the customary heat bath dilution. The initial pressure has been varied between 3.2 and 42 bar and the initial temperature between 660 and 1350 K, while the equivalence ratio covers the region between 0.5 and 3.0. In dependence upon these parameters the...