A Study on Flowfields of Two Opposed Supersonic Free Jets with Different Source Pressure

Abstract

The structures of two opposed supersonic argon free jets with different source pressure are studied by flow visualization using laser-induced fluorescence of iodine molecules seeded in argon. A ratio between source pressures is ranged between 3.0 and 5.0. Experi-ments are carried out for various source pressures and various ratios of the source pressure to the pressure of the expansion chamber. Characteristic structures of the flow field are classified roughly into four types depending on the condition of the source pressures and the pressure of the expansion chamber. Specifically, an unstable flow in the interacting region are found. The condition of pressures is examined for each type of the flow field.