Analysis of mechanism of jointed energy dissipation of stilling basin and aerated baffle and its validation by experiment

The jointed energy dissipation mechanism of stilling basin and aerated baffle is analysed based on additional jet flow hydraulic jump theory. The economic benefits of new additional energy dissipation facilities are estimated in terms of the decreased percentage of the sequent depth of hydraulic jump and length of jump, or the capacity of hydraulic jump under the unit width. The experiment results of the model stilling basin and aerated baffle attest the theoretical analysis. Using the model experiment data, the authors calculate the decreased percentage of water jump length and unit width hydraulic jump volume, the energy dissipation rate of aerated baffle, as well as the water depth downstream of the jump. It is concluded that aerated baffle can increase the energy dissipation rate of hydraulic jump theory and decrease the engineering cost. The obvious economic benefits and the predicted effect of additional jet flow hydraulic jump are obtained.