螺旋管式蒸汽发生器管束流体弹性不稳定性机理研究  

Study on Fluid-elastic Instability Mechanism of Tube Bundle for Helical Coil Steam Generator

作　　者：王越[1,2] 谭蔚 WANG Yue;TAN Wei(School of Chemical Engineering,Tianjin University,Tianjin 300000,China;CNNC No.7 Research&Design Institute Co.,Ltd.,Taiyuan 030032,China)

机构地区：[1]天津大学化工学院,天津300000 [2]中核第七研究设计院有限公司,山西太原030032

出　　处：《原子能科学技术》2025年第3期607-615,共9页Atomic Energy Science and Technology

摘　　要：螺旋管束由于其结构紧凑、传热效率高等特点广泛应用于快堆与第4代核电堆型中。为揭示螺旋管束流体弹性不稳定性,本文在验证激振模型的冲击实验基础上,利用螺旋管束激振模型系统地研究了管的相对位置、管束结构参数对螺旋管振动响应的作用机制。研究发现面外方向的振幅远大于面内方向的,相邻管层节径比对螺旋管振动响应的影响强于同层管间节径比与螺旋角。通过改变管间流速,探究了螺旋管束流体弹性不稳定性机理,提出了预测临界流速的半经验公式,并且同现有直管管束的国家标准与先前的研究成果进行了对比分析,结果为螺旋管式蒸汽发生器的设计与工程评估提供了理论基础。The helical tube bundle is widely used in fast reactor and fourth generation nuclear power reactor because of its compact structure and high heat transfer efficiency.The bundle arrangement of adjacent layers wound in the opposite direction for helical-tube heat exchanger is constantly changing in the axial section of the helix.In addition,turbulence makes the fluid in the shell-side present flow instability in the subcritical region,and the vibration form of coil tube bundle coupled to the fluid is not specified.There is no basis for the safety prediction and evaluation of FIV(flow induced vibration)for the bundle wound in the opposite direction.The robustness of the 3D fluid-structure interaction numerical model was verified by measuring the in-plane and out-of-plane vibration responses of coil tubes.In order to prove the reliability of 3D fluid-structure interaction numerical models,an impact test system about FIV was designed and established.On the basis of the impact experiment to verify the excitation model in regard to helical tube bundle,the mechanism of the relative position of the tubes and the structural parameters of the tube bundle on the vibration response of the helical tube was systematically studied by using the helical tube bundle excitation model.The influence of pitch diameter ratio between adjacent tubes on the vibration response of the tubes is stronger than that of pitch diameter ratio between tubes in the same layer and helix angle.The more compact the bundle arrangement is,the greater the vibration response of the tubes is,and the more drastic the amplitude fluctuation is.With the increase of helix angle,the difference of vibration response between front tube and back tube became smaller,and the amplitude increased slightly.With the increase of flow rate between the tubes,the amplitude in both directions increased gradually,while the amplitude in the out-of-plane is significantly larger than that in the in-plane,and it is the first to occur fluid-elastic instability.Based on the quasi-stat

关 键 词：螺旋管式蒸汽发生器 管束振动 流体弹性不稳定性 临界流速半经验公式 

分 类 号：TL353[核科学技术—核技术及应用]