Empirical Correlations for Breakup Length of Liquid Jet in Uniform Cross Flow-A Review

Abstract

The empirical correlations for the prediction of breakup length of liquid jet in uniform cross are reviewed and chassified in this study. The breakup length of liquid jets in cross flow was normally discussed in terms of the distances from the nozzle exit to the column breakup location in the x and y directions, called as column fracture distance and col-fied as constant form, momentum flux ratio form, Weber number form and other parameter form, repectively. In addition, the empirical correlations for the prediction of column fracture height can be grouped as momentum flux ratio. However, Weber number, liquid-to-air ciscosity ratio and density ritio. Reynolds number of ohnesorge number were incorporated in the empirical correlations depending on the investigators. It is clear that there exist the remarkable discrenpancies of predicted values by the existing correlations even though many correlation have the same functional form. The possible reasons for discrepancies can be summarized as the different experimental conditions including jet operating condition and nozzle geometry, measurement and image processing techniques introduced in the experiment, difficulties in defining the breakup location ete. The evaluation of the existing empirical correlations for the prediction of breakup length of liquid jet in a uniform cross flow is required.