Design of water-air spurting aerator used under ice and in deep water and experimental study on its performance

A new type of aerator, which could be used under ice and in deep water, was designed in terms of water-air spurting principle to solve the problem of oxygen supply for fish and water cleaning in fish pond in the north of China in winter season. The main configuration parameters were determined by calculation and experiment. The results showed that maximum aerating efficiency(AE) was achieved when spurting mouth diameter d_p1, mixing chamber diameter d₃, and section aera ratio f₃/f_p1 of spurting mouth and mixing chamber were 25 mm, 48 mm, and 3.69, respectively, AE was positively correlated with air intake, AE increased with the increase of depth at the rate of 0.49 kg O₂·m^-1. In addition, several regression equations were established for main configuration parameters.