An Analysis of Joint Energy Dissipation Mechanism of Stilling Basin and Aeration baffle with Additional Momentum

In this paper, the joint energy dissipation mechanism of stilling basin and Aeration baffle is analysed based on additional momentum hydraulic jump theory. The economic benifits 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 aeration baffle attest the theoretic 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 aeration baffle, as well as the water depth downstream of the jump. It is concluded that aeration 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 momentum hydraulic jump are obtained.