摘要
基于计算流体力学和计算结构动力学,同时考虑流体-结构两个物理场之间的相互作用,利用有限体积法及LES方法离散非稳态、粘性、不可压缩湍流流场的N-S方程,用有限元方法离散结构动力学方程,结合动网格控制技术,建立了横向流体作用下传热管流致振动计算的三维仿真模型。基于建立的模型,首先得到了横流作用下传热管的振动响应,并与已有的实验数据比较,证明了模型的合理性;其次,研究了来流速度和频率比对传热管流致振动特性与流场结构的影响。
A three-dimensional numerical model for tube vibration induced by cross flow is proposed based on the CFD and CSD method. The model presents a three dimensional fully coupled approach with solving the fluid flow and the structure vibration simultaneously. The three-dimensional unsteady, viscous, incompressible Navier-Stokes equation and LES turbulence model are solved with the finite volume approach. The dynamic equilibrium equation is discretized according to the finite element theory and the mesh renew is achieved by the dynamic mesh technology. The vibration response of a single tube is calculated by the FIV numerical model firstly. Both the amplitude and frequency is compared to experimental data and existing models in the literature. That shows the present model is reasoable. Secondly, the effects of the flow velocity and frequency ration on flow induced vibration characteristic and flow structure are studied.
出处
《机械设计与制造》
北大核心
2014年第4期224-227,共4页
Machinery Design & Manufacture
