Abstract:For an aerator with sudden lateral enlargement and vertical drop in free flow chute

the bottom cavity length is governed not only by hydraulic parameters

but also by structural parameters of the bottom aerator and lateral aerator.The previous calculation method for the bottom cavity length failed to consider the effect of lateral aerator’s structural parameters.Based on the hydrodynamic analysis of micro water unit of jet flow from aerator

a new calculation method for the bottom cavity length of jet flow from chute aerators with sudden lateral enlargement and vertical drop was obtained

which considers overall effects of the above mentioned parameters.The comparison with 30 groups of experimental data and existing research results showed that the calculating method proposed in this paper has higher accuracy.