Fundamantal Study on Spray Quenching

Abstract

An experimental study on cooling of hot air stream by liquid spray was made to obtain fundamental knowledge of spray quenching. Experiments were performed in a vertical downward flow of air in a 0.059 m diameter tube, and heat and mass transfer rate and pressure drop were studied. In this experiment, the maximum temperature drop during a contact time of 0.007 sec was 300°C. No effect of high mass flux upon the measured heat and mass transfer were observed within the accuracy of the experiment in the range of experimental conditions.
A theoretical approach was developed and good agreement was obtained between theoretical and experimental results. The theoretical calculations were carried out by using the mean volume-surface droplet diameter, and an equation of cooling efficiency is presented.