Abstract
A laser-induced phosphorescence phenomenon of vapor-phase biacetyl tracer is applied to ionic wind visualization for velocity measurements based on an image analysis. The phosphorescence phenomenon is used as a molecular tagging approach for gas-phase flow visualization due to the long lifetime of phosphorescence than fluorescence. The ionic wind is an electrohydrodynamically induced gas-phase flow phenomenon on corona discharges of a needle-plate electrode arrangement. This paper presents the experimental method and the typical visualization results of molecular tagging approach along with ionic wind, and a phosphorescence image analysis for velocity measurements is conducted.
