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Improving Phase Doppler Volume Flux Measurements in Low Data Rate Applications.


pdf icon Improving Phase Doppler Volume Flux Measurements in Low Data Rate Applications. (216 K)
Widmann, J. F.; Presser, C.; Leigh, S. D.

Measurement Science and Technology, Vol. 12, No. 1, 1180-1190, August 2001.

Keywords:

droplets; sprinklers; sprays; multiphase flow; phase Doppler interferometry; phase Doppler particle analyzer; volume flux measurements

Abstract:

Phase Doppler interferometry (PDI) measurements in low number density sprays necessitate a compromise between collecting a large number of samples for adequate statistics and practical data acquisition times. This paper investigates the effect of insufficient sample statistics on the calculated probe area, and the resultant uncertainty in the volume flux measurement. Several methods of improving the probe area calculation and volume flux measurement are investigated using experimental data obtained from water sprays produced by residential fire sprinklers. The corrections result in statistically significant improvements in the volume flux measurements.