CFD与准静态理论混合的管束结构流弹失稳预测方法  

A Hybrid CFD and Quasi-Static Theory Method for Fluidelastic Instability Prediction of a Tube Bundle

作　　者：宋乐琨 赵燮霖 周进雄[1] 叶献辉[2] 冯志鹏[2] 熊夫睿[2] Song Lekun;Zhao Xielin;Zhou Jinxiong;Ye Xianhui;Feng Zhipeng;Xiong Furui(State Key Laboratory for Strength and Vibration of Mechanical Structure,School of Aerospace,Xi’an Jiaotong University,Xi’an,710049,China;Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213,China)

机构地区：[1]西安交通大学航天航空学院机械振动与强度国家重点实验室,西安710049 [2]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：《核动力工程》2021年第3期90-95,共6页Nuclear Power Engineering

基　　金：国家自然科学基金资助项目(11972277)。

摘　　要：为开发一种不依赖实验而预测管束结构流体弹性不稳定性(简称流弹失稳)的方法。采用计算流体力学(CFD)方法获取阻力、升力系数及其空间导数,并将3者代入预测流弹失稳的准静态理论中,提出了一种适用于管束结构的混合流弹失稳预测方法,此方法考虑了管束在横流和顺流2个方向上的不稳定性;以正三角形管束为例,计算了2种节距比(P/d)下流弹失稳特性。结果表明,基于本文提出的CFD与准静态理论混合的弹性管束结构流弹失稳预测方法,可以在不需要实验的情况下获得管束结构发生流弹失稳现象的临界速度;采用此方法计算的流弹失稳结果与文献中的实验结果吻合良好。In order to develop a method for predicting the fluidelastic instability of the tube bundle without relying on experiments,a hybrid fluidelastic instability prediction method for tube bundle is proposed by using CFD to capture drag and lift coefficients and their spatial derivatives,and substituting them into the quasi-static theory for fluidelastic instability.The developed method accounts for the instability of a tube bundle for both cross-flow and in-flow directions.Taking the normal triangle tube bundle as a typical example,the fluidelastic instability of two pitch ratios was performed.The results show that the prediction method of the elastic tube bundle fluidelastic instability based on the CFD and quasi-static theory hybrid can obtain the critical velocity of fluidelastic instability of the tube bundle without experimentation.The fluidelastic instability results calculated by this method are in good agreement with experimental results in literature.

关 键 词：流弹失稳 管束结构 计算流体力学(CFD) 准静态理论 

分 类 号：TL334[核科学技术—核技术及应用]