【作者】 李珊珊； 李国栋； 沈桂莹； 郭利豪； 姜铎；

【Author】 LI Shan-shan;LI Guo-dong;SHEN Gui-ying;GUO Li-hao;JIANG Duo;State Key Laboratory of Eco-hydraulics in Northwest Arid Region,Xi’an University of Technology;Warping Dam construction center;

【机构】 西安理工大学西北旱区生态水利国家重点实验室； 榆林市淤地坝建设中心；

【摘要】 琴键堰作为一种全新的迷宫堰型,具有超泄能力强、适应单宽流量范围大,基座占地少等优点,在提高新建水库的有效库容以及病险水库的除险加固方面都有着广阔的应用前景。本文在琴键堰现有体型参数及泄流能力研究成果的基础上,考虑不同工程的造价成本及设计的主要需求,制定了琴键堰实际工程的总体设计准则;进一步基于模型实验及数值模拟的水力计算结果,根据工程的约束条件,分别以新建工程项目和已建工程升级改造项目为例,提出了琴键堰实际工程应用的完整的设计方法和具体的设计步骤;最后,在工程初步设计的基础上,提出琴键堰的主要体型参数和辅助体型参数的最终的水力优化建议,为提升琴键堰设计水平,推动其在实际工程中的应用提供技术支撑。更多还原

【Abstract】 In this paper some aspects of the numerical computation of the linear temporal hydrodynamic stability of the Blasius boundary layer and Bickely jet are considered.The semi-infinite and infinite domain is mapped to finite domain by algebraic and exponential coordinate transform,and then the solutions are expanded in a finite Chebyshev series.The problem with the boundary condition at infinity is overcome by defining an auxiliary variable,and the matrix eigenvalue problem is attacked directly.It is demonstrated by the Blasius equation and Orr-Sommerfeld equation of flat plane boundary layer that algebraic mappings are very useful if the solution being sought behaves in a simple way at infinity.But for stability equation at infinite domain such as Bickely jet,the exponential mappings is the better without physical constrains.Abstract:As a new type of labyrinth weir,Piano Key weir(PKW) has the advantages of super discharge capacity,large single-width flow range that can be adapted,and less base area,so it has broad application prospects in improving the effective storage capacity of new reservoirs and the danger removal and reinforcement of dangerous reservoirs.Based on the existing research results of geometry parameters and discharge capacity of PKW,considering the cost of different projects and the main requirements of design,the overall design criteria of PKW are proposed;Moreover,according to the calculation results,according to the constraints of the project,the complete design method and specific design steps of the practical engineering application of the PKW are given in detail by taking the new construction project and the existing project upgrading project as examples;Finally,based on the preliminary design of the project,the final hydraulic optimization suggestions for the main shape parameters and auxiliary shape parameters of PKW are put forward,which provides technical support for improving the design level of PKW and promoting its application in practical engineering.更多还原