速度-涡量法数值求解具有表面吹吸圆柱的绕流问题

凌国平; 方健雯

速度-涡量法数值求解具有表面吹吸圆柱的绕流问题

苏州大学, 数学系, 江苏, 苏州, 215006

基金项目: 江苏省自然科学基金资助项目(BK97056109)

详细信息

作者简介:
凌国平(1945- ),男,上海人,教授(E-mail:sz-lgp@163.com).

中图分类号: O357;O241
计量
- 文章访问数: 2410
- HTML全文浏览量: 147
- PDF下载量: 568
- 被引次数: 0
出版历程
- 收稿日期: 2001-01-13
- 修回日期: 2002-05-28
- 刊出日期: 2002-09-15

Numerical Study on the Flow Around a Circular Cylinder With Surface Suction or Blowing Using Vorticity-Velocity Method

Department of Mathematics, Suzhou University, Suzhou 215006, P. R. China

摘要

摘要: 用速度-涡量法数值求解了具有表面吹吸圆柱的绕流问题.所得高阶隐式差分方程,采用以修正的不完全LU分解作预处理器的共轭梯度法(MILU-CG),高效解出.研究了雷诺数Re=100时,各种吹吸位置、吹吸强度对圆柱尾流涡旋结构和阻力、升力系数的影响规律.指出,在圆柱肩部的吸气和在圆柱尾部的吹气,可有效地抑制尾流涡旋结构在垂直来流方向上的非对称性,达到减小升力的目的.对在圆柱肩部吸气的情形,合适选择吸气强度,还可有效减小圆柱在来流方向上所受的阻力.
- 具有表面吹吸圆柱 /
- 钝体分离旋涡运动及其控制 /
- 速度-涡量法 /
- 预处理共轭梯度法
Abstract: A vorticity-velocity method was used to study the incompressible viscous fluid flow around a circular cylinder with surface suction or blowing. The resulted high order implicit difference equations were effeciently solved by the modified incomplete LU decomposition conjugate gradient scheme (MILU-CG). The effects of surface suction or blowing's position and strength on the vortex structures in the cylinder wake, as well as on the drag and lift forces at Reynoldes number Re=100 were investigated numerically. The results show that the suction on the shoulder of the cylinder or the blowing on the rear of the cylinder can effeciently suppress the asymmetry of the vortex wake in the transverse direction and greatly reduce the lift force; the suction on the shoulder of the cylinder, when its strength is properly chosen, can reduce the drag force significantly, too.

HTML全文

参考文献(6)

[1]	Williams C R,Mansy H,Amato C.The response of asymmetry properties of a cylinder wake subjected to localized surface excitation[J].J Fluid Mech,1992,234:71-96.
[2]	Lin J C,Towfighi J,Rockwell D.Near-wake of a circular cylinder:Control by steady and unsteady surface injection[J].J Fluids & Structures,1995,9(5):659-669.
[3]	Ling L M,Ramaswamy B,Cohen R D,et al.Numerical analysis on Strouhal frequencies in vortex shedding over square cylinders with surface suction and blowing[J].Internat J Numer Methods Heat Fluid Flow,1993,3(3):357-375.
[4]	Gatski T B.Review of incompressible fluid flow computations using the vorticity-velocity formulation[J].Appl Num Mathematics,1991,7(2):227-239.
[5]	YUAN Li,FU De-xun,MA Yan-wen.Numerical simulation of axisymmetric unsteady incompressible flow by a vorticity-velocity method[J].Internat J Numer Methods Fluids,1995,21(3):401-411.
[6]	LING Guo-ping,Shih T M.Numerical study on the vortex motion patterns around a rotating circular cylinder and their critical characters[J].Internat J Numer Methods Fluids,1999,29(2):229-248.