水力自动翻板门稳定性数值模拟研究  

Numerical simulation of the stability of automatic tilting water gate

作　　者：李树宁[1] 杨敏[1] 

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300072

出　　处：《水力发电学报》2012年第1期135-139,共5页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金创新研究群体科学基金(51021004);国家杰出青年基金(50725929);水利部公益性行业科研专项(200901081);西部交通建设科技项目(2009328000084)

摘　　要：水力自动翻板闸门因其结构简单、造价低廉等优点,在各类水利工程中得到广泛应用,但此门型由于频繁摆动而存在"拍打"等水力现象,使其不稳定。基于此,本文采用大涡模拟方法,利用VOF方法跟踪自由水面技术建立了二维湍流模型,对水力自动翻板闸门进行了水动力荷载数值模拟,模拟结果与模型试验实测结果吻合良好。在此基础上,从动态平衡和静态平衡两个方面分析了翻板门的稳定性,分析结果表明:自动翻板门的上下游侧脉动压力均方根小于1.4kPa或者连杆开启角度较大时,闸门运行稳定性越好。本文所提出的判断闸门稳定性指标可以为类似工程设计提供可靠参考。When an automatic tilting water gate is operating,instability could occur such as frequent swinging,flapping and random hydraulic acting,and these instable phenomena directly impact structure security and project efficiency.To simulate the hydrodynamic loads on such a gate,in this paper a 3-D large eddy simulation（LES） turbulence model is developed in combination with a volume-of-fluid free-surface tracking technique,and its results agree quite well with the measurements of physical model tests.It is used to analyze the the gate conditions of dynamic and static balances.The results show that if the standard deviation of fluctuating pressures on both surfaces of the gate is below 1.4Kpa or the opening angel is large,the gate will operate in a good stability condition.The stability index proposed in this paper for evaluation of the tilting gate＇s stability provides a reliable criterion for similar designs.

关 键 词：水利水电工程 水力自动翻板门 稳定性 压力脉动 大涡模拟 

分 类 号：TV663.8[水利工程—水利水电工程]