摘要
应用有限元方法通过求解原始变量的二维不可压粘性流体的N-S方程和管线振动方程,数值模拟了近底管线的绕流及漩涡脱落引起的管线振动,采用ALE方法解决因管线振动引起的动网格问题和流固耦合问题。数值模拟了雷诺数90<Re<150,孔隙比0.3<e/D<8之间的管线动态响应特征,得到了管线在不同间隙比和雷诺数情况下的振动曲线和升阻力系数曲线,分析了振动—间隙比—升阻力曲线之间的关系。同时还得到了孔隙比对漩涡脱落频率的影响。计算中边界层厚度取0.8D,圆柱振动被简化为质量—弹簧—阻尼系统。
The finite element method was employed to solve the N - S equation. Incorporated with the vibration equation, the vortex - induced vibration of the near- wall pipeline is studied by an Arbitrary - Lagrangian - Eulerian （ALE） algorithm. The Reynolds number based on the cylinder diameter and the undisturbed flow velocity range from 90 to 150. The numerical model has been validated by comparison with the experimental data in literature. The dynamic responses of the pipeline near a plane for gaps sizes from 0 to 8 times the diameter （d） of the pipeline were simulated and the vibration characteristics were studied attentively. The lift coefficient and drag coefficient were also studied at different gaps. The effect of gaps on vortex shedding frequency were also studied. The thickness of boundary layer is 0.8D. The motion of the cylinder was modeled by a spring- damper- mass system.
出处
《水道港口》
2007年第4期265-269,共5页
Journal of Waterway and Harbor
关键词
近底管线
涡激振动
ALE
有限元
near - wall pipeline
vortex - induced vibration
ALE
FEM
作者简介
赵刘群（1981-），男，河南省人，硕士，从事海洋流体动力学研究。
