Structures of the Flow Fields of Interacting Parallel Supersonic Free Jets

Abstract

In this study, the flow fields of interacting two, three or four parallel supersonic free jets are studied by flow visualization using the planar laser induced fluorescence of iodine molecules seeded in the test gas. Centers of orifices are set on a line, tops of a triangle or square. The flow fields are visualized at the plane including the jet centerlines and at the cross sections vertical to the centerlines. The flow field structures are clarified using the many visualized picutures for each geometrical arrangement of the orifices. Especially, three dimensional structures of the flow fields do not tends downstream to the structures to be expected from the arrangement of the orifices.