混流可逆式机组工况变换过程导叶小开度区流动控制研究

项目名称： 混流可逆式机组工况变换过程导叶小开度区流动控制研究

项目编号： No.51279084

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 水利工程

项目作者： 樊红刚

作者单位： 清华大学

项目金额： 80万元

中文摘要： 本项目针对抽水蓄能电站机组在抽水停机、抽水调相转抽水及发电停机等工况变换过程中在导叶小开度区(小于10%最大开度)可能出现的异常声响和水力振动问题，将机组内部流动计算和电站过渡过程计算相结合，实现工况变换过程导叶开启和关闭的暂态流场计算，研究导叶间流速和作用在导叶上水力矩的变化规律，并与电站管道系统水力振动分析相结合，揭示流动不稳定引起导水机构产生异音和振动的原因，在此基础上通过研究电站工况变换过程控制措施和导叶形状对导叶间流态的控制和改善作用，提出改善系统运行稳定性的控制措施和导叶叶型设计原则，深化和完善抽水蓄能电站系统和机组的设计和运行控制理论，提高电站的运行稳定性，为我国今后的抽水蓄能电站发展做出贡献。

中文关键词： 可逆机；工况变换；小开度；流动控制；

英文摘要： In a pumped storage power station, the units may produce vibration and noise at times when the guide vanes rotate into the small opening region(less than 10% of the maximum opening) in the operating condition transition, such as shutdown and startup in pumping mode, shutdown in turbine mode. The unsteady flow calculation in the pump turbine is coupled with the transient simulation of the power station to realize the simulation of the unsteady flow in the guide vanes, when they are opened or closed in the condition transformation. The flow rate and the hydraulic torque in the guide vanes are studied, combined with the hydraulic vibration analysis of pipeline system in the power station. The reason is exposed how the vibration and noise is induced by the instability of the flow in the guide vanes. Based on these, the influence on the flow pattern in the guide vanes of the process control and the guide vane profile is researched, and the optimum process control method and the design criteria of guide vane are presented to improve the flow stability in the small guide vane opening. The design and control theory of the pumped storage power station is deepened and perfected to improve the operation stability, which is contribute to the development of the pumped storage power station in our country.

英文关键词： pump turbine；operating condition transition；slight guide vane opening；flow control；