用参数多项式方法分析管束流动中振动圆管的流体激振特性  

AN ANALISIS OF FLOW INDUCED VIBRATION CHARACTERISTICS FOR TUBE ARRAYS IN CROSSFLOW BY USING THE PARAMETER POLYNOMIAL EXPRESSIONS

作　　者：张俊杰[1] 刘红[1] 张恒斌[1] 陈佐一[1] 

机构地区：[1]清华大学热能工程系,北京100084

出　　处：《中国电机工程学报》2003年第9期173-177,共5页Proceedings of the CSEE

基　　金：国家重点基础研究专项经费项目(G1999022306)~~

摘　　要：确定绕流流体作用在振动管束上的流体激振力是分析换热器管束流体弹性稳定性的关键。该文应用参数多项式方法,在直接求解粘性流方程的基础上确定管束流动中作用在振动圆管上的非定常气动力及流体激振特性,包括振动圆管的表面非定常压力分布、各种振型条件下的非定常气动力作功性质的变化、来流速度变化对非定常气动力作功的影响,并在此基础上进行管束流动的气动弹性稳定性分析及确定临界流速。研究发现管子振型对于非定常气动力作功有十分重要的影响,甚至会改变作功的正负。该文的研究是基于求解流动基本方程基础上分析管束振动流 体弹性稳定性的新进展。The flow induced vibration of tube arrays is very important in heat exchanger. The key elements necessary to accurately predict fluidelastic instability of tube arrays in crossflow are motion-dependent fluid force. The equations of vicious flow are solved directly by using parameter polynomial method to determine the fluid force and the flow induced vibration characteristics. Then the distribution of unsteady pressure on the surface of vibrating tube, the property of aerodynamic work, positive or negative, under different vibration mode, the relation between incoming flow and aerodynamic work etc. can be obtained. For different condition, the fluidelastic stability and the critical velocity are determined. The results show that the vibration mode affect the unsteady work greatly. In some cases, it can change the property of the unsteady work. In this paper the method is developed to analyze the fluidelastic stability of tube arrays.

关 键 词：振动圆管 流体激振特性 换热器 管束流动 参数多项式方法 

分 类 号：TK172[动力工程及工程热物理—热能工程]