某工程消力池体型优化研究
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摘要
针对某工程下游河道水深较浅,泄洪闸消力池内无法形成水跃并且对下游河床造成较大冲刷破坏的问题,通过水工模型试验从水流流态、下游河床冲刷程度等方面对消力池体型进行了优化调整,结果表明,"消力池+护坦"的消能方案消力池内水跃流态稳定,消力池后半区波动较小,出池水流流态与下游河道水流衔接良好;消力池边墙设计高度满足要求,消力池底板脉动压强较小且最大值位于消力池前半区。该实验成果可为类似工程消力池体型设计提供参考。
In view of the shallow depth of the river in the downstream of a project,the water leaping in the sluice gate of the sluice gate can not form a water jump and cause large erosion damage to the downstream riverbed.This paper uses the combination of hydraulic theory calculation and hydraulic model test to the shape of the stilling pool.The optimization and adjustment were carried out several times,and the advantages and disadvantages of the shape of the stilling pool were compared from the aspects of the flow state of the water flow and the degree of erosion of the downstream riverbed.Finally,the energy dissipation scheme of the"Plunge Pool+Protector" was obtained.The test results of the recommended scheme show that the water jet flow in the stilling pool is stable,and the fluctuation in the latter half of the stilling pool is small.That is,energy dissipation is mainly completed in the first half of the stilling pool.The main function of the latter half of the stilling pool is to further adjust the flow pattern of the pool to achieve a good connection with the downstream river flow;The design of the side wall of the stilling pool meets the requirements.The pulsating pressure of the bottom plate of the stilling pool is small and the maximum value is located in the front half of the stilling pool.The research results can provide reference for the design of the stilling pool type for similar engineering conditions.
In view of the shallow depth of the river in the downstream of a project,the water leaping in the sluice gate of the sluice gate can not form a water jump and cause large erosion damage to the downstream riverbed.This paper uses the combination of hydraulic theory calculation and hydraulic model test to the shape of the stilling pool.The optimization and adjustment were carried out several times,and the advantages and disadvantages of the shape of the stilling pool were compared from the aspects of the flow state of the water flow and the degree of erosion of the downstream riverbed.Finally,the energy dissipation scheme of the"Plunge Pool+Protector" was obtained.The test results of the recommended scheme show that the water jet flow in the stilling pool is stable,and the fluctuation in the latter half of the stilling pool is small.That is,energy dissipation is mainly completed in the first half of the stilling pool.The main function of the latter half of the stilling pool is to further adjust the flow pattern of the pool to achieve a good connection with the downstream river flow;The design of the side wall of the stilling pool meets the requirements.The pulsating pressure of the bottom plate of the stilling pool is small and the maximum value is located in the front half of the stilling pool.The research results can provide reference for the design of the stilling pool type for similar engineering conditions.
引文
[1]吴持恭.水力学(第四版)[M].北京:高等教育出版社,2008.