棱柱绕流流动的数值模拟(英文)

Numerical analysis of fluid flow around diamond cylinders

利用数值方法对长宽比为1/3,1和3的棱柱绕流在雷诺数为100的非稳态流动特性进行了分析和研究。采用有限体积法对棱柱绕流的二维流动N-S方程进行离散求解,分析和研究了非稳态的棱柱绕流流场,升力系数,阻力系数和涡动特性,数值模拟的结果与相关文献的数据比较吻合。通过上述研究能够为了解棱柱绕流的非稳态流动特性提供有力的帮助。而对棱柱三维流动的模拟分析和对雷诺数的变化对棱柱流动特性的影响进行研究,将为掌握棱柱绕流的工程特性打下基础。

A numerical simulation of the flow past a diamond cylinder with different aspect ratio 1/3,1 and 3 which is able to oscillate transversely to the incident stream,are presented in this paper for a fixed Reynolds number equal to 100.The 2D unsteady Navier-Stokes equations are solved by a finite volume method.The flow structures,coefficient of drag and lift and Strouhal number have been discussed based on the transient numerical analysis results for different aspect ratio.The simulation results like flow structure,drag coefficient,lift coefficient and Strouhal numbers,in good agreement with available published data,which supplies us with a good understanding of the flow of diamond cylinder with different axis ratios at low Reynolds number.To gain a better understanding of the flow around diamond cylinder,3D numerical study of diamond cylinder with more varying AR at different Reynolds numbers should be conducted.