Laser Sheet Dropsizing of dense sprays

A new technique has been developed that produces instantaneous or time-averaged twodimensional images of Sauter Mean Diameter from a spray. Laser Sheet Dropsizing (LSD) combines elastic and inelastic light scattered from a laser sheet. Compared with Phase Doppler Anemometry (PDA), the new technique offers advantages in increased spatial and temporal resolution and more rapid spray characterisation. Moreover, the technique can also be applied to dense sprays. Successful implementation requires careful calibration, particularly of the effect of dye concentration on the dropsize dependence of the inelastic scattered light.