柔性壁对湍流边界层速度型的变形影响  

Influence of compliant wall on velocity profile deformation in a turbulent boundary layer

作　　者：赵汉中[1] 

机构地区：[1]华中科技大学力学系,湖北武汉430074

出　　处：《水动力学研究与进展（A辑）》2002年第4期391-399,共9页Chinese Journal of Hydrodynamics

摘　　要：本文从稳定性的观点出发 ,研究了粘弹性柔性壁对湍流边界层的影响。由柔性壁边界层稳定性问题的特征值计算结果发现 ,原刚性壁湍流边界层的速度型导致流固耦合系统不稳定 ,对数区上移后的边界层速度型却可以使耦合系统稳定。这说明 ,在没有水动力学不稳定发生的情况下 。The influence of a viscoelastic compliant wall on the turbulent boundary layer was studied from the viewpoint of stability. It was found from the numerical results for the case of compliant wall that the velocity profile originally obtained for the turbulent boundary layer over a rigid wall leads to unstable eigenvalues of the fluid wall system, but the velocity profiles with upward shifted logarithmic region may be stable. The results indicate that coating a compliant wall makes the logarithmic region of a turbulent boundary layer shift upwards as unstable hydrodynamic waves are absent.

关 键 词：湍流边界层 柔性壁 稳定性 速度型 

分 类 号：O357.4[理学—流体力学]