换热器管束的流体弹性不稳定性  

FLUIDELASTIC INSTABILITY OF HEAT EXCHANGER ARRAY

作　　者：聂清德[1] 郭宝玉[1] 张明贤[1] 侯曾炎[1] 申东雄[1] 

机构地区：[1]天津大学化学工程系

出　　处：《天津大学学报》1993年第1期38-47,共10页Journal of Tianjin University(Science and Technology)

基　　金：天津市自然科学基金

摘　　要：基于Lever与Weavar的“流管”模型,对换热器管束的流体弹性不稳定进行了研究。基本方程利用复数解法进行求解。证明了作用在管上的流体力与管子运动时的位移、速度、加速度密切相关,得出的稳定区图可用来判断管子是否发生流体弹性不稳定现象。模型管束为正方形排列,节径比为1.25、1.32与1.41。试验在风洞中进行。计算结果与实验数据相符。Fluidelastic instability is the most important vibration excitation mechanism for heat exchanger tube array subjected to high-velocity cross flow. From the viewpoint of practical application, the authors focus to discuss the tube-in-channel model of Lever and Weaver. However, the complex method is used to solve the vibration equation of tube. By the use of IBM personal computer the fluid force acting on the tube and the threshold velocity of fluidelastic instability will be readily determined.The experiments were performed in a wind tunnal. The test section is a square flow channel with a flow area of 250mm×350mm. The maximum flow velocity of 40 m/s can be reached. The calculated results have shown well agreement compared with experimental data.

关 键 词：换热器 管束 流体 弹性 不稳定性 

分 类 号：TQ051.5[化学工程]