均匀流中悬空管道横向振动的数值分析

Numerical simulation of viscous flow around a suspended pipe resonant transversely in a uniform stream

通过交错网格系统中的SIMPLE算法求解N-S方程,模拟均匀来流中的静止管道绕流场,验证模型的可靠性;应用动网格技术,对均匀来流中悬空的横向振动管道绕流场进行数值模拟,得出不同频率比下的升力系数、阻力系数随时间的变化曲线及涡量等值线分布,并利用快速傅立叶变换分析静止和振动管道的升力系数的功率谱.

The viscous flow around pipe is solved by the N-S equation with SIMPLE algorithm in the system of staggered grids.Numerical simulation of a pipe at rest in a uniform stream is performed to validate the model.By using dynamic mesh,the study of viscous flow around a suspended pipe resonant transversely in a uniform stream is carried out.With different ratios of frequency,the result shows the lift and drag coefficients changing with time,and also the pictures of vortex contours.The lift coefficients were analyzed with the fast Fourier transform(FFT).