DECONVOLUTION OF PARTICLE-SIZE DISTRIBUTI ONS MEASURED BY PHASE DOPPLER ANEMOMETRY

Until now phase Doppler anemometry (PDA) could not be applied to inves tigate sprays of an optically inhomogeneous liquid. Optical inhomogeni ties result in a broadening of the measured particle size distribution s. In this paper a deconvolution method is proposed to compute the und erlying ''real'' distribution from the measured distribution. The tran sfer function needed for deconvolution is obtained by measuring the PD A size distribution of single-size droplets of the liquid under invest igation produced by a piezo-electric droplet generator.