Absorption filter based optical diagnostics in high speed flows

Absorption filter based optical diagnostics techniques introduced by Miles et al. in the Rayleigh scattering regime and by Komine et al. in the Mie scattering regime have started a new era in flow visualization, simultaneous velocity and thermodynamic properties measurements, and planar velocity measurements. Filtered planar velocimetry (FPV) is a newly developed technique whose principles are based on Miles et al.'s study. FPV is currently being extended to the three-camera configuration for the simultaneous measurement of all the three components of instantaneous velocity on a plane and of thermodynamic properties on a point. The accuracy and robustness of the technique are currently being improved.