管束结构流弹失稳的数值预测方法研究  

Numerical prediction method for fluid-elastic instability of tube bundle structure

作　　者：冯志鹏[1] 蔡逢春[1] 臧峰刚[1] 齐欢欢[1] 黄旋[1] 刘帅 FENG Zhipeng;CAI Fengchun;ZANG Fenggang;QI Huanhuan;HUANG Xuan;LIU Shuai(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu 610213,China)

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610213

出　　处：《振动与冲击》2023年第23期49-54,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(51606180,11872060,11902315);四川省自然科学基金资助项目(2022NSFSC1182)。

摘　　要：流弹失稳(流体弹性不稳定)会在短时间内导致管束破坏,是蒸汽发生器设计必须考虑的流致振动机理。通过理论建模和计算流体力学(computational fluid dynamics, CFD)计算相结合的方式,发展流弹失稳行为的数值预测方法。首先,分别基于准稳态理论、非稳态理论和一维非定常流动理论,推导出目前研究最广泛的三种流弹失稳理论模型的控制方程和关键参数的数学模型;然后,发展理论模型中众多参数的辨识方法,通过仿真数据驱动的方式,获得全套流体力相关参数;最后,以华龙一号蒸汽发生器的传热管为对象,建立管束结构流弹失稳的数值预测方法,并用现有试验数据验证。结果表明,通过CFD计算辨识的流体力相关参数与已有试验结果吻合,CFD计算与理论模型耦合的数值预测方法,具备一定的实用性;完成了数值预测方法的工程应用,预测结果与验证性试验的结论一致;数值预测方法结合了理论建模和CFD计算的优点,同时避免了对海量计算资源的需求、降低对试验数据的依赖,有利于在工程中推广应用。Fluid-elastic instability(FEI)can cause tube bundle failure in a short time,it belongs to flow-induced vibration mechanism being necessary to consider in steam generator design.Here,the numerical prediction method of FEI behavior was developed through combination of theoretical modeling and computational fluid dynamics(CFD)calculation.Firstly,based on the quasi-steady state theory,the non-steady state theory and the 1-D unsteady flow theory,respectively,control equations and mathematical models of key parameters of the three most widely studied FEI theoretical models were derived.Then,identification methods of many parameters in theoretical models were developed to obtain complete set of parameters related to fluid force through the simulation data driven method.Finally,a numerical prediction method for FEI of tube bundle structure was established taking the heat transfer tube of Hualong No.1 steam generator as the study object,and it was verified with the existing test data.The results showed that fluid force-related parameters identified through CFD calculation agree well with existing test results,and the numerical prediction method with CFD calculation-theoretical model coupled has a certain practicality;the engineering application of the numerical prediction method is completed,the prediction results are consistent with conclusions of verification tests;the proposed numerical prediction method can combine advantages of theoretical modeling and CFD calculation,avoid demands for massive computing resources,and reduce dependence on test data,this method is beneficial for promoting its application in engineering.

关 键 词：流体弹性不稳定(FEI) 计算流体力学(CFD) 管束 流致振动 

分 类 号：O322[理学—一般力学与力学基础]