Measurement of gas jet flow velocities using laser-induced electrostrictive gratings

We used time-resolved light scattering of cw probe laser radiation from las er-induced electrostrictive gratings for the determination of flow velociti es in air at room temperature. Some possibilities of the technique have bee n experimentally demonstrated with submerged planar air jets in atmosphere, both for accumulated and single-shot measurements. The range of investigat ed flow velocities was 5-200 m/s. The method of data treatment and of the e stimate of the experimental parameters is described.