摘要
突扩式消力池常见于多孔水闸和泵闸结合的水利枢纽,其水跃跃后水深的计算是一个无法回避的问题。由于突扩式水跃水流的复杂性,对其跃后水深的理论研究尚不成熟与完善。根据已有文献的试验资料,对前人常用研究方法所得的突扩式水跃跃后水深成果进行了定量分析与比较。结果表明,当边墙反力对应的压强水头等于跃前水深和跃后水深的平均值时,其计算的跃后水深与实际更加相符。通过建立绕流阻力新模型,结合已有文献的实测资料,给出了突扩式水跃绕流阻力系数的计算公式,提出了突扩式水跃跃后水深计算的新方法,并对其准确性和通用性进行了验证。
Stilling basin with abrupt expansion has been commonly applied to hydro-junction of multi-outlet sluice and pump combined with sluice structure. The calculation of sequent water depth is an inevitable problem to be faced with. Due to the complexity of hydraulic jump in abruptly expanding s t illin g basin, theoretical study of se-quent depth is not yet mature and perfect. According to the test data in some artic le s, the calculation results of se-quent depth obtained in some previous researches are compared and analyzed in quantitative terms. Results suggest that the calculated sequent depth is consistent with the actual situation when pressure head is equal to the mean val-ue of upstream supercritical flow depth and sequent depth. Furthermore, a new method for calculating sequent depth is put forward by giving the calculation formula of circumfluent resistance coefficient based on the model of circum-fluent resistance. The correctness and availability of the proposed method is also verified.
作者
傅铭焕
郭曙啸
卢志男
惠祥明
FU Ming- huan GUO Shu- xiao LU Zhi- nan HUI Xiang-ming(Zhejiang Design Institute of Water Conservancy and Hydroelectric Power, Hangzhou 310002, China)
出处
《长江科学院院报》
CSCD
北大核心
2017年第5期48-52,共5页
Journal of Changjiang River Scientific Research Institute
关键词
突扩式水跃
边墙反力
跃后水深
压强水头
绕流阻力系数
abruptly expanding hydraulic jump
side wall reaction forces
sequent depth
water head
circumfluent resistance coefficient
