基于流固耦合的闸下淹没出流流场瞬态分析
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摘要
弧形钢闸门开启泄流过程中时常存在严重的振动问题,为掌握此过程中水流诱发的振动机理、从而避免闸门的剧烈振动,结合实际工程中某胸墙式弧形钢闸门,考虑上下游水位工况,应用ANSYS FLORTRAN多耦合分析平台,为实现上下游两侧水体与弧门面板两侧的耦合设置,首次采用SOLID187实体单元模拟面板,建立多种开度下的水体—弧门耦合模型。对该模型进行瞬态求解,研究了闸下淹没出流、考虑水体—弧门耦合作用时,弧形闸门的不同开度对流场的瞬态流速、近壁水体动压力的变化规律,得出相应结论。
There is a serious vibration problem in the opening process of curved steel gate for water discharge. In order to understand the vibration mechanism induced by water flow and avoid gate vibration,the ANSYS FLORTRAN multi-coupling analysis platform is adopted to establish water-gate coupling model for a breast-wall steel radial gate under different gate openings,in which,the upstream and downstream water level conditions are considered,and in order to realize the coupling between upstream and downstream water bodies and gate panel,the SOLID187 solid element is firstly used to simulate panel.The transient solution of model is studied. The variations of the transient velocity of flow field and the dynamic pressure of nearwall water under submerged outflow and different gate openings are studied,and corresponding conclusions are obtained.
There is a serious vibration problem in the opening process of curved steel gate for water discharge. In order to understand the vibration mechanism induced by water flow and avoid gate vibration,the ANSYS FLORTRAN multi-coupling analysis platform is adopted to establish water-gate coupling model for a breast-wall steel radial gate under different gate openings,in which,the upstream and downstream water level conditions are considered,and in order to realize the coupling between upstream and downstream water bodies and gate panel,the SOLID187 solid element is firstly used to simulate panel.The transient solution of model is studied. The variations of the transient velocity of flow field and the dynamic pressure of nearwall water under submerged outflow and different gate openings are studied,and corresponding conclusions are obtained.
引文
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[2]郭桂祯.平板闸门垂向流激振动特性与数值计算研究[D].天津:天津大学,2011.
[3]水利部水工金属结构安全监测中心.1993-2017年期间金属结构安全检测报告[R].南京:河海大学.
[4]李明.弧形闸门动力特性及流激振动数值模拟[D].长沙:长沙理工大学,2013.
[5]WEAVER D S.论水流引起水工建筑物的振动和减振措施[C]∥高速水流译文集.北京:水利电力出版社,1979.
[6]BHARGAVA V P,NARASIMHAN S.Pressure fluctuations on gates[J].Journal of Hydraulic Research,1989,27(2):215-231.
[7]张声鸣.水跃区水流脉动压力相似律的试验研究[J].长江科学院院报,1991,8(4):1-9.
[8]廖庭庭,刘士和.闸孔出流水流特性数值模拟[J].武汉大学学报:工学版,2015,48(2):152-155.
[9]王福军.计算流体动力学分析:CFD软件原理与应用[M].北京:清华大学出版社,2004:7-12.
[10]胡友安,王孟.水工钢闸门数值模拟与工程实践[M].北京:中国水利水电出版社,2010.
[11]NICOLET C,RUCHONNET N,AVELLAN F.One-dimensional modeling of rotor stator interaction in Francis pump-turbine[C]∥23rd IAHR Symposium on Hydraulic Machinery and Systems,Yokohama,Japan,2006.