Comparison of techniques for non-intrusive fuel drop size measurements in a subscale gas turbine combustor

Analysis of LIF and Mie signals from single micrometric droplets for instantaneous droplet sizing in sprays

“…To calibrate the LIF/Mie ratio, Phase Doppler Anemometry (PDA) was largely used in the past [6,[28][29][30][31][32][33][34]. However, PDA instruments measure temporally varying spray drop sizes at a single point, which is convenient for time-averaged measurements.…”

Numerical evaluation of droplet sizing based on the ratio of fluorescent and scattered light intensities (LIF/Mie technique)

“…The technique has been applied by a number of researchers to characterize sprays [25][26][27][28][29][30][31][32] even in regions when the droplet density makes the application of other laser diagnostic measurements difficult. However, not all researches agree on the correctness of the fundamental hypothesis of the LIF/Mie technique.…”

“…For example, the fluorescent light is indeed emitted from within the droplet volume but its intensity distribution has been shown to vary within the droplet volume [33][34]. It has also been demonstrated that the light absorbed by a droplet [29,35] and the fluorescent light emitted from it [15,21,[36][37], are not always proportional to the volume of the droplet. All the effects regarding the absorption and fluorescent light emission from droplets were shown to be significantly influenced by the concentration of the fluorescent dye in the droplet.…”