用附加动量理论分析掺气分流墩与消力池联合消能机理

用“附加动量”水跃理论分析了掺气分流墩与消力池联合应用的消能机理，用跃后水深、水跃长度或单宽水跃容积减少的百分数，估计新增消能设施的经济效益。并通过模型试验验证了消能的理论分析，计算了新增设施的消能量、跃后水深、水跃长度或单宽水跃容积减少的百分数。结果表明，采用掺气分流墩设施，可增进消力池的消能作用，并取得显著的经济效益，达到了附加动量水跃理论所预期的效果。

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.