A shadowgraph and a new fuel injection system were used to study kerosene t
ransversely injected into a supersonic flow. High pressure and velocity of
injection can be attained. The pressure time histories were detected in oil
-line and the shadowgraphs of the flow field were obtained at different tim
e-delays. The inflow stagnation pressure was varied to change the local flo
w speed in test section. The results indicate that kerosene jet exhibits de
ep penetration and four regimes appear clearly during the fuel jet atomizat
ion in a high-speed flow. The jet disintegration is caused by surface waves
propagating along the jet surface, and the breakup point is located at the
wave trough. The surface waves are dominantly generated by aerodynamic for
ce. The jet shock is close to windward surface of the jet. The shock reflec
ts on and transmits in duct boundary layers. In the case of unsteady inject
ion, the shock structure is very complicated and different from that of hyd
rogen injection. The results of kerosene injected into a quiescent gas and
a subsonic flow are also provided for comparison.