A direct comparison of transverse velocimetry techniques using photon Doppler velocimetry (PDV) in oblique impact experiments

Photon Doppler velocimetry has been used increasingly to measure transverse velocity in dynamic experiments. This work presents results of an oblique impact experiment which was performed using a slotted-barrel gas gun to generate normal and shear stress waves resulting in longitudinal and transverse velocity. Multiple transverse PDV diagnostic configurations were fielded on a single test enabling the results to be directly compared. Results indicate variability between the velocimetry results due to varying levels of measurement uncertainty, and illustrate best practices aiming to further advance transverse velocimetry measurements.