Numerical simulation of pulse detonation engine (PDE) with fluidic nozzle

In order to increase the nozzle's propulsion performance of PDE, numerical studies of fluidic nozzles have been carried out to study the flow field and the propulsion performance of fluidic nozzles in steady flow and during the cyclic operation. Simulation results and their analysis show preliminarily that: (1) in steady flow, with the use of secondary injection, when the core flow's pressure increases, the augmented ratio of the nozzle's propulsion performance will decrease; (2) when the detonation chamber's pressure is very high, the instantaneous flow rate of the secondary flow will dynamically reduce or stop injecting; (3) when the detonation chamber's pressure is low, the secondary flow will dynamically restore. The augmented ratio of average thrust and that of specific average thrust with single injector are respectively 2.63%, 0.36%, and 5.96%, 0.75% with dual injector.