侧向挑入消力池的岸边溢洪道水力特性研究

Research on Hydraulic Characteristics of Bank Spillway Laterally Jetting into Plunge Pool

针对岸边溢洪道从侧面挑入与其平行布置的已有消力池来消能的布置形式,采用数值模拟方法研究了高程和流量对挑坎(а=45°)及消力池水力特性的影响。结果表明,随着泄流量逐渐增大,挑坎内最大水深、最大压力及消力池最大压力均逐渐增大,挑流水舌入水长度与纵向入水长度均逐渐增大;随着挑坎与消力池高差的减小,挑坎最大水深和最大压力均逐渐增大,而消力池最大压力变化较小。拟合得挑坎最大水深和最大压力的定量计算公式,从而为该型岸边挑坎的工程设计提供了参考。

A layout of side spillway was studied in this article,which could make the water lateral scatter into an existing parallel-arranged plunge pool to achieve energy dissipation.The numerical simulation method was used to study the influence of height and discharge on the hydraulic characteristics of the bucket(a=45°)and plunge pool.The results show that with the gradual increase of the discharge,the maximum water depth and the maximum pressure in the bucket and the maximum pressure on the bottom of plunge pool gradually increase,and the horizontal and vertical entering length of nappe gradually increase.As the height difference between the bucket and the stilling pool decreases,the maximum water depth and the maximum pressure of the bucket gradually increases,while it has little impact on the maximum pressure of the plunge pool.Quantitative calculation formulas were obtained to calculate the maximum water depth and the maximum pressure of the bucket,which provided a reference for the engineering design of this type of bucket.