【作者】 王滢；

【导师】 侍克斌；

【作者基本信息】 新疆农业大学 ， 水利水电工程， 2005， 硕士

【摘要】 管道输水过程中由于地势高低不同经常出现落差大的情况,使得输水管管道承担的压力变化范围大、总水头高,因此管道水流转化为明渠水流时需设计特定形式的消能建筑物。对水头高,流量小的管道水流消能,圆形深筒式消力井是较理想的消能建筑物。本文通过物理模型试验,对圆形深筒式消力井进行了试验研究给出了水力设计的基本方法,并在此基础上对井内水流流态作了探索性研究。 本文首先较系统地总结了消能工的研究现状;设计制作圆形深筒式消力井水工模型,通过试验及数据分析建立了圆形深筒式消力井各变量间的函数关系式,得出圆形深筒式消力井水力设计的基本方法,即已知设计流量和进水管直径,由曲线可得到圆形深筒式消力井的最优尺寸,并运用工程算例进行验证。根据水力学基本原理建立了圆形深筒式消力井井内水流二维紊流代数应力模型,确立了相应的边界条件,为从理论上更深入的研究圆形深筒式消力井消能机理提供了一个新的数值研究方法。更多还原

【Abstract】 High vertical distance often happens in pipe conveyance because of different physiognomy. The pipe must stand the wide range of pressure changes and high total head .So a certain energy dissipator needs to design in the transportation from pipe flow to open channel flow. Circular stilling wells are ideally suited for dissipation of high energy pipe flow.Based on physical model experiment, hydraulic design of circular stilling wells is made in this paper.Then the flow regime in the wells is studied.Firstly, the energy dissipation engineerings are systematically concluded. Then circular stilling well hydraulic model is made.The paper presents guidelines to aid the designers in determining optimum well geometry for their specific needs. General design criteria have been established to determine well size based on design discharge, Q, and diameter of the standard sleeve valve, D. Finally the paper also studies the current flow in circular stilling wells by using numberical algorithm. An ASM turbulence model is developed ,and the boundary conditions are established.更多还原