Numerical investigation of the transverse jet effects on detonation initiation characteristics

In order to investigate the effects of transverse jet on detonation initiation characteristics, the detonation initiation process was simulated by employing CFD technique. The processes for detonation initiation by the transverse jet with the different conditions were analyzed, and the effects of jet pressure, velocity, and temperature on detonation initiation characteristics were studied. Stoichiometric propane-air mixture was used. The simulation results indicate that the transverse detonation jet can not directly initiate the mixture in the detonation chamber for the physical model. Detonation was indirectly initiated by transverse wave and hot spot and local detonation was caused by the transverse jet. The transverse jet has the minimum jet pressure of 0.9 MPa, in which detonation can be initiated successfully by the transverse jet for the physical model. Further decreasing jet pressure or jet velocity or lower jet temperature will not be more difficult to initiate detonation by transverse jet.