DRAG FORCE AND VIRTUAL MASS OF A CYLINDRICAL POROUS SHELL IN POTENTIAL FLOW

被引：2

作者：

POWER, H ^{[1
]}

TYVAND, PA ^{[1
]}

机构：

[1] AGR UNIV NORWAY,DEPT PHYS & METEOROL,N-1432 AS,NORWAY

来源：

ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND PHYSIK | 1992年 / 43卷 / 06期

关键词：

D O I：

10.1007/BF00916428

中图分类号：

O29 [应用数学];

学科分类号：

070104 ;

摘要：

We study the two-dimensional potential flow due to a circular cylinder in motion relative to an unbounded fluid. The cylinder consists of a thin, circular porous shell with fluid inside. The full nonlinear hydrodynamic problem is solved by Fourier expansion of Green's theorem. The truncated series is determined numerically by sampling points around the circle. A dimensionless shell parameter is introduced. For homogeneous porous shells, a maximal drag force occurs at the value 0.433 for the shell parameter, but the virtual mass is a monotonous function of the shell parameter. For an inhomogeneous shell, we have found a maximal value for the virtual mass which is 5% above the value for a rigid cylinder. Some of the results may be relevant to offshore engineering, especially in connection with porous coating of platform legs to reduce the total force.

引用

页码：1055 / 1071

页数：17

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