摘要
通过求解同心套管包围的带N-1个同心支承板传热管的运动方程,导出计算挤压膜阻尼和粘滞阻尼的公式.为了验证理论分析结果,对同心套管包围的四跨传热管在静水中的挤压膜阻尼和粘滞阻尼进行了实验研究,得出了粘滞阻尼与同心套管内径以及管子与同心套管偏心率的关系;挤压膜阻尼与支承板厚度、传热管与支承板管孔间隙、与支承板管孔偏心率之间的关系.在分析实验结果的基础上,得出了传热管总阻尼的公式,并为换热器设计提供了传热管管壁间距离、支承板厚度以及支承极管孔与管子间隙的参考尺寸.
The formulas of the squeeze film damping and viscous damping are derived by solving the motion equation of a heat exchanger tube enclosed in a concentric sleeve with (N -1)concentric support plates.
An experimental study of squeeze film damping and viscous damping for a four span heat exchanger tube enclosed in a concentric sleeve is carried out in quiescent water in order to verify the result of theoretical analysis. The relationship of viscous damping with the inner diameter of concentric sleeve and tube - sleeve eccentricity is presented. The relationships of squeeze film damping - support plate thickness and tube - support plate hole eccentricity as well as tube - support plate hole clearance are obtained on the basis of experimental result. The design sizes of heat exchanger tube spacing, support plate thickness and support plate hole clearance are presented for reference.
出处
《化工学报》
EI
CAS
CSCD
北大核心
1993年第1期81-89,共9页
CIESC Journal
关键词
同心套管
传热管
阻尼特性
concentric sleeve, heat exchanger tube, eccentric ratio, squeeze film damping, viscous damping
