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作 者:吴月 杨亮 王泽 李占超 WU Yue;YANG Liang;WANG Ze;LI Zhan-chao(Huaihe River Project Construction Authority of Huaihe River Water Resources Committee,Bengbu 233001,China;Bengbu Sluice Project Management Office,Bengbu 233010,China;College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou 225009,China)
机构地区:[1]淮河水利委员会治淮工程建设管理局,安徽蚌埠233001 [2]安徽省蚌埠闸工程管理处,安徽蚌埠233010 [3]扬州大学水利科学与工程学院,江苏扬州225009
出 处:《水电能源科学》2021年第3期62-66,61,共6页Water Resources and Power
基 金:江苏省自然科学基金项目(BK20171288);国家自然科学基金项目(51779215)。
摘 要:由于水工消能设施内水流流态复杂,当水流流态为恒定急变流和非恒定流时,现有消能率计算公式不能适用。为此,基于水工消能设施内流体能量消散的本质,通过能量方程推导出适用于恒定流和非恒定流计算消能率的一般公式,利用重积分数值计算方法和离散函数求导法则处理所提的消能率计算公式,并给出恒定均匀流、恒定急变流、非恒定流条件下消能率的具体计算方法。最后,以平原区某水闸为例,采用所提公式计算该闸闸门开启后10~40s内消力池的消能率。理论分析及计算案例表明,所提消能率计算公式可适用于复杂流态下消能率计算,通过重积分数值计算方法和离散函数求导法则处理后的计算公式具有实用性和可行性,可较好地解决恒定急变流和非恒定流条件下消能率无法计算或计算结果偏差较大的问题。Due to the complexity of flow pattern in hydraulic energy dissipation facilities,when the flow pattern is rapidly varied to steady flow and unsteady flow,the existing calculation formula of energy dissipation ratio cannot be applied.In order to solve this problem,based on the essence of fluid energy dissipation in hydraulic energy dissipation facilities,this paper deduces the general formula suitable for calculating the energy dissipation ratio of steady flow and unsteady flow through the energy equation,processes the formula for calculating the energy dissipation ratio by using the numerical calculation method of multiple integral and the derivation rule of discrete function,and gives the specific calculation method of energy dissipation ratio at the conditions of uniform flow,rapidly varied steady flow and unsteady flow.Finally,taking a sluice in the plain as an example,the proposed formula is used to calculate the energy dissipation ratio of the energy dissipation tank within 10to 40seconds after the sluice gate is opened.Theoretical analysis and calculation examples show that the proposed formula can be applied to the calculation of the energy dissipation ratio in complex flow pattern.The formula processed by the numerical calculation method of multiple integral and the derivation rule of discrete function is practical and feasible,which can better solve the problem that the energy dissipation ratio cannot be calculated or the calculation result has large deviation in the condition of rapidly varied steady flow and unsteady flow.
关 键 词:水工消能设施 消能率 恒定流 非恒定流 计算方法
分 类 号:TV135.29[水利工程—水力学及河流动力学]
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