轻工机械2018，Vol.36Issue(3)：36-40,45,6.DOI:10.3969/j.issn.1005-2895.2018.03.007
流体诱发换热器管束弹性不稳定性的数值模拟
Numerical Simulation of Fluid-Elastic Instability in Heat Exchanger Tube Bundles
摘要
Abstract
Aiming at frequently occurred vibration damage problems of conventional heat exchangers, based on dynamic mesh technique and two-way fluid-structure interaction, a three-dimension numerical model of flow-induced vibration was established.The vibration trajectory of tube bundles, which were obtained difficultly in the experiment, were supplemented by numerical simulation.The change of the main vibration direction in the fluid-elastic instability of the tube bundle was studied.The influence of tube position on vibration was analyzed.The effects of configuration and pitch-to-diameter ratio of tube bundles on fluid-elastic instability were investigated.The results show that the fluid-elastic instability first occurs in the drag direction, and then occurs in the lift direction.The amplitude of the tube located at the edge is larger than that of the middle tube.In the four kinds of arrangements of the tube bundles, the occurrence of fluid-elastic instability from difficult to easy as follows: normal square, normal triangular, rotated square and rotated triangular.In a certain range, the fluid-elastic instability is more prone to occur with the decrease of pitch-to-diameter ratio.The study on the simulation of heat exchanger tube bundles plays a certain guiding role in engineering application.关键词
动网格/流体弹性不稳定性/双向流固耦合/振动轨迹Key words
dynamic mesh/fluid-elastic instability/two-way fluid-structure interaction/vibration trajectory分类
能源科技引用本文复制引用
程瑞佳,张亚楠,肖清,陈小阁,刘宝庆..流体诱发换热器管束弹性不稳定性的数值模拟[J].轻工机械,2018,36(3):36-40,45,6.基金项目
国家自然科学基金项目(21776246). （21776246）
