千吨级海水淡化试验装置蒸发器管束流致振动特性验证分析  

Validation and analysis of flow-induced vibration characteristics of the evaporator tube bundles in a 1000ton-scale seawater desalination test set

作　　者：张奭 侯峰 刘瑞[2] 李录平[2] 陈向民 晋风华[2] 邓子豪 ZHANG Shi;HOU Feng;LIU Rui;LI Luping;CHEN Xiangmin;JIN Fenghua;DENG Zihao(Hebei Guohua Cangdong Power Generation Co.,Ltd,Cangzhou 061113,China;School of Energy and Power Engineering,Changsha University of Technology,Changsha 410014,China)

机构地区：[1]河北国华沧东发电有限公司,河北沧州061113 [2]长沙理工大学能源与动力工程学院,湖南长沙410014

出　　处：《热科学与技术》2024年第5期519-525,共7页Journal of Thermal Science and Technology

基　　金：国家能源集团科技资助项目(SHGF-16-29)

摘　　要：利用多孔介质模型和FLUENT软件对千吨级低温多效海水淡化试验装置的某一效蒸发器壳侧流场进行模拟,获得了蒸汽横掠管束流动的流速分布。研究了蒸发器结构、蒸发温度以及蒸发量对蒸汽流动的影响,发现蒸汽绕流管束,会导致管束边缘局部蒸汽横掠流速增大,使流致振动频率范围接近换热管固有频率,影响换热管安全。研究结果表明:采用多孔介质模型可以极大地简化蒸发器壳侧蒸汽流场计算,实现对大型蒸发器的整体模拟仿真,为优化蒸发器设计,避免换热管束流致共振提供理论指导。The porous media model and Fluent software were used to simulate the flow field on the shell side of the 1000-ton low-temperature multi-effect seawater desalination evaporator,and the velocity distribution of steam flowing across tube bundled was obtained.The influence of the evaporator structure,evaporation temperature and the evaporation rate on the steam flow was analyzed.It was found that the steam flowing around the tube bundle would cause the local steam traverse velocity to increase at the edge of the tube bundle,making the flow-induced vibration frequency range close to the natural frequency of the heat transfer tube,and affecting the safety of seawater desalination evaporator.The research results show that the porous media model can greatly simplify the calculation of the steam flow field at the shell side of the evaporator and realize the overall simulation of the large evaporator,which can provide guidance for evaporator design to avoid resonance of heat transfer tubes.

关 键 词：海水淡化 蒸发器 流致振动 数值模拟 

分 类 号：TH123[机械工程—机械设计及理论] TK172[动力工程及工程热物理—热能工程]