Ideal partially-fueled detonation cycle model was established based on FicketJacobs cycle.It is shown that partial fuel filling will cause decrease of total thermal efficiency

which means that this work mode is not adequate to the application of detonation for power output.However

as energy exchange between combustion products and purge gas occurs during the expansion of the detonation products under this mode

it can be used to enhance the propulsive efficiency of PDE.