Flow Visualization of Free Jets by LIF Method and an Analysis of their Structures by Picture Processing

Abstract

This paper presents flow visualization of free jets from a sonic nozzle by LIF (Laser lnduced Fluorescence) method and an analysis of their structures by picture processing. LlF method in this paper uses a property that iodine, seeded in carrier gas, radiates fluorescence by irradiation of laser beam. Features of free jets, mach disk and barrel shock, are measured from picture processing of developed films.