Numerical analysis on shell-side flow-induced vibration and heat transfer characteristics of elastic tube bundle in heat exchanger
Numerical analysis on shell-side flow-induced vibration and heat transfer characteristics of elastic tube bundle in heat exchanger
复制标题
换热器壳程流激振动及弹性管束传热特性数值分析
DOI：
10.1016/j.applthermaleng.2016.07.018
复制
发表时间：
2016-08-25
影响因子：
6.4
通讯作者：
Bi, Wenbo
中科院分区：
文献类型：
--
作者：
Ji, Jiadong;Ge, Peiqi;Bi, Wenbo
基于双向流固耦合方法的序贯求解，研究了换热器中弹性管束的壳程流激振动响应和传热特性。考虑到网格划分的方便性和计算效率，提出了合适的网格划分策略和步长计算方法。讨论了壳程进水速度对弹性管束流激振动响应和传热特性的影响。结果表明，壳程流体引起各管束的振动主要是面外振动。当壳程流体入口速度较低时，两种不锈钢块的振动幅度基本一致，当壳程流体入口速度较高时，不锈钢块III的振动幅度更剧烈。此外，当壳程流动引起弹性管束振动时，在低流量（或低雷诺数）下，各弹性管束的传热系数显着增加。 (C) 2016 Elsevier Ltd. 保留所有权利。
Based on the sequential solution of bi-direction fluid-structure coupling method, the shell-side flow-induced vibration responses and the heat transfer characteristics of the elastic tube bundles in heat exchanger have been investigated in this paper. Taking into account the meshing convenience and computing efficiency, appropriate meshing strategy and step calculation method have been proposed. Effects of shell-side water inlet velocity on the flow-induced vibration responses and heat transfer characteristics of the elastic tube bundle have been discussed. The results indicate that the mainly vibration of each tube bundle induced by the shell-side fluid is the out-plane vibration. The vibration amplitudes of the two stainless steel blocks are basically consistent when the shell-side fluid inlet velocity is lower, and the vibration amplitude of the stainless steel block III is more intense when the shell-side fluid inlet velocity is higher. In addition, the heat transfer coefficient of each elastic tube bundle has increased significantly at low flow rate (or low Reynolds number) when the shell-side flow-induced the elastic tube bundle vibration. (C) 2016 Elsevier Ltd. All rights reserved.