通过比尺为35和20的两个模型，观测了流态、压力分布、通气量、掺气浓度分布等物理量，对三峡工程泄洪深孔跌坎掺气体型中的跌坎高度、明槽坡度、盖板形式和通气孔尺寸等进行了比较，提出了可行的深孔跌坎掺气体型。该体型已为设计采用。另外还对不同比尺模型中水流掺气的比尺效应进行了初步探讨。

By means of two hydraulic model with scales 1 ∶35 and 1∶20,some physical parameters were measured ,such as flow pattern,pres sure distribution,ventilation rate and air entrainment concentration.A configura tion of outlet with aerator was recommended from comparison of some factors incl uding the height of drop,the gradient of open chute,the form of roof plate and t he size of ventilating holes etc.This figuration was adopted by the design.Fina lly,the scale effect of air entrainment on different size models is discussed in the paper. 