Under the operation conditions of rotating speed from 400 to 1400 r·min-1

liquid flow rate from 0. 1 to 0.5 m3·h-1 and sufficient steam

the heat transfer characteristics of a rotor-stator-reactor (RSR) and the distribution of liquid were studied via water and water vapor. The heat transfer coefficient increased with the increase of rotating speed and liquid flow rate. But the slope of increase reduced with the increase of liquid flow rate. At a small liquid flow rate of 0.1—0.3 m3·h-1 and a low-rotating speed of 400 r·min-1

the temperature rise was non-uniform and the liquid distribution was uneven. Finally an empirical correlation of the heat transfer coefficient was derived through dimensional analysis. The statistical tests showed that the results predicted by the correlation equation were in good agreement with the experimental data.