ON DETONATION BEHAVIOR OF MIXED FUELS

An experimental study of detonation was carried out for mixed fuels (H -2/CH4, H-2/C3H8 and CH4/C4H10). The results obtained demonstrate that detonation velocities of mixed fuels agree very well with normal C-J velocity and that detonation limits were not extended by the addition of a small amount of C4H10. As for CH4/C4H10 mixed fuel, detonation ve locities and detonation limits as a function of the equivalence ratio of the whole mixture of mixed fuel coincided with those of CH4 single fuel. However, the detonation induction time of a mixture of CH4/O-2/N -2 with a lower sensitivity to detonation decreased considerably with the addition of a small amount of C4H10. In addition, the influence of mixed fuels on the quasi detonation and the fast deflagration in the process of DDT was investigated, showing interesting and complicated f eatures in mixed fuel.