Abstract
For an analysis of supersonic flow, visualization of the flow field structure using LIF of tracers has been employed. In this study, the capability of imaging of supersonic flow using O2-LIPF (Laser-Induced Predissociative Fluorescence) is examined. Since oxygen is one of main component of air, O2-LIPF may make it possible to visualize the air flow in the high speed wind tunnel without the tracer. However, because the visualization of the flow field below the room temperature using O2-LIPF is very difficult, ithas been applied only to the high entalpy and combustion flow, not to high speed flow with low temperature. In this study, the supersonic oxygen flow is visualized by O2-LIPF, using an ArF excimer laser and a high-sensitive CCD camera. If long exposure time (1200 seconds) of the CCD camera is set and the scattered laser beam is suppressed sufficiently, the supersonic oxygen flow below the room temperature using O2-LIPF can be imaged successfully.
