Abstract
Schlieren photography is one of the most popular flow visualization techniques. Although its photographic data include density information, however, it have been used only for qualitative analysis.
The objective of this research is to develop a measurement technique for quantitative analysis using Schlieren photography. With this it will be possible to measure instantaneously the whole space of the density field.
This paper describes the theoretical background, the execution problems, and the necessary correction techniques. The experiment was made for a two dimensional CO 2 jet injected into air. The results show that air entrainment can be quantitatively analyzed with sufficient accuracy, when appropriate correction is employed.
