摘要
文中重点讨论了管壳式换热器管束中的流体弹性不稳定性．从工程实用的观点出发，应用了Ｌｅｖｅｒ与Ｗｅａｖｅｒ的“流管”模型，在建立管子振动的基本方程时则认为管子作周期性的衰减（或发散）运动，以复数解法进行求解．根据所获得的对比流速与质量阻尼参数之间的关系画出的稳定区图，可用来确定管子的流体弹性不稳定性或该时的临界流速．实验数据表明，理论计算结果是令人满意的．
In this paper the authors focus to discuss the fluidelastic instability in tube arrays of heat exchangers.From the viewpoint of practical application,the tube-in-channel model ofLever and Weaver are utilized. However, the vibration of tube is considered as periodic damping(or divergent)motion and the fundamental equations are solved by means of complex method.According to the relation between reduced flow velocity and mass damping parameter, the stability map will be drawn out, which may be used to predict the threshold of fluidelastic instability of tube.Theoretical results agree reasonably well with experimental data of the authors and that cited from literatures.
出处
《力学学报》
EI
CSCD
北大核心
1996年第2期151-158,共8页
Chinese Journal of Theoretical and Applied Mechanics
基金
国家自然科学基金
关键词
换热器
管束
流体弹性
不稳定性
heat exchanger,tube array,fluidelastic instability
