Prediction of Bubble Size Distribution above the Bubble-Breaking Plate

The chord length distribution (CLD) of bubbles in the region above the bubble-breaking plate in the scrubbing-cooling chamber was studied experimentally using a conductivity probe. The predictive correlations of the shape parameters were established by fitting the CLD with a distribution function. The bubble shape was discussed, and the CLD was analytically converted to the size distribution of the direct contact of the probe. The results showed that the CLD has specific right-skewed characteristics, and the Rayleigh distribution has the best-fitting effect on the CLD. The correlation equation of the shape parameter k of the Rayleigh distribution concerning the Fr number, local gas holdup epsilon g, and dimensionless radius r/R was established. The predicted bubble size distributions (BSDs) based on ellipsoids are in good morphological agreement with the experimental size distributions. The relative error between the calculated and experimental values of the gas-liquid interface area was within +/- 20%, which verified the accuracy of the prediction of the BSD.