O_2-LIPFによる超音速流れの可視化

概要

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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 O_2-LIPF (laser-induced predissociative fluorescence) is examined. Since oxygen is one of the main components of air, O_2-LIPF may make it possible to visualize the air flow in a high-speed wind tunnel without a tracer. However, because the visualization of the flow field below room temperature using O_2-LIPF is very difficult, it has been applied only to high enthalpy and combustion flows, not to high-speed flow with low temperature In this study, the supersonic oxygen flow is visualized by O_2-LIPF, using an ArF excimer laser and a high- sensitivity CCD camera. If the CCD camera is set at a long exposure time (1200 seconds) and the scattered laser beam is suppressed sufficiently, the supersonic oxygen flow below room temperature using O_2-LIPF can be imaged successfully.
一般社団法人日本機械学会の論文
1994-09-25