换热器内多排弹性管束壳程流体诱导振动响应的数值分析

季家东 1,葛培琪 1, 2,毕文波 1

振动与冲击 ›› 2016, Vol. 35 ›› Issue (20) : 85-89.

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PDF(1990 KB)
振动与冲击 ›› 2016, Vol. 35 ›› Issue (20) : 85-89.
论文

换热器内多排弹性管束壳程流体诱导振动响应的数值分析

  • 季家东 1 , 葛培琪 1, 2 , 毕文波 1
作者信息 +

Numerical analysis on shell-side flow induced vibration responses of multi-row elastic tube bundles in heat exchanger

  • JI Jia-dong 1  GE Pei-qi 1, 2  BI Wen-bo 1
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摘要

为了研究弹性管束在壳程流体诱导下的振动特性,基于双向流固耦合分析的顺序求解法,对单排和多排弹性管束在壳程流体诱导下的振动响应进行了数值研究。研究表明壳程流体诱导弹性管束的振动主要表现为面内振动,且监测点各方向的振动存在明显的谐频。流体诱导下各排管束间的振动相互影响,最底部管束的振动强度最低,其余各排管束的振动强度由下到上呈逐渐递减的趋势,顶部部分管束的振动频率偏低。由于管束重力和流体冲击力的相互作用,最底部管束的振动平衡位置位于管束平面的上方,其余各排管束的振动平衡位置位于管束平面的下方,且各排管束的振动平衡位置由下到上逐渐降低并趋于稳定。

Abstract

The vibration characteristics of the elastic tube bundle with single and multi-row generated by shell-side cross flow are numerical studied, and the sequential solution method of bi-directional fluid-structure coupling is used to investigate the vibration responses of the elastic tube bundle. Numerical results show that the in-plane vibration is displayed when the elastic tube bundle subjected to shell-side cross flow. There are significantly harmonic frequencies of the monitor points in all directions. In addition, the flow-induced vibration interacts with each other between the rows of the elastic tube bundles, and the top part of the elastic tube bundles has lower vibration frequency. The elastic tube bundle at the bottom has the lowest vibration intensity, and the vibration intensity of the remaining tube bundles decrease gradually from the bottom to the top. On the other hand, the vibration equilibrium position of the elastic tube bundle at the bottom is higher than the elastic tube bundle plane, while the vibration equilibrium positions of the remaining tube bundles are lower than the elastic tube bundle plane. More deeply, vibration equilibrium positions of the elastic tube bundles decrease from the bottom to the top and stabilized gradually.
 
 

关键词

换热器 / 弹性管束 / 流体诱导振动 / 双向流固耦合

Key words

heat exchanger / elastic tube bundle / flow-induced vibration / bi-directional fluid-structure coupling

引用本文

导出引用
季家东 1,葛培琪 1, 2,毕文波 1. 换热器内多排弹性管束壳程流体诱导振动响应的数值分析[J]. 振动与冲击, 2016, 35(20): 85-89
JI Jia-dong 1 GE Pei-qi 1, 2 BI Wen-bo 1. Numerical analysis on shell-side flow induced vibration responses of multi-row elastic tube bundles in heat exchanger[J]. Journal of Vibration and Shock, 2016, 35(20): 85-89

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