顺流平板的湍流边界层

本文作者将自己建议过的圆管湍流运劝的普适速度分布,用于不可压缩流动中顺流平板湍流边界层的分析,通过 Karman 动量积分,得到一组简明、准确的参数分析公式;进一步完善了内层变量法,给出了阻力系数 C_D 的积分式,以及相应的功应力公式和阻力公式。另外对部分重要阻力公式作了分析比较。

Turbulent Boundary Layer Along a Flat Plate at Zero Incidence

In this paper,a universal velocity distrbution in a pipe proposed bythe author is used for analyzing the incompressible turbulent boundary layeralong a flat plate at zero incidence.Upon integration of Von Karman mom-entum integral equation,a set of the boundary layer paranmter formulae,which are simple,accurate and universally applicable to the whole turbulentflow from hydraulically smooth to completely rough flow,have been estab-lished.Then the inner parameter method has been further perfected.We havederived the C_D-integration in terms of internal variables and the relatedformulae of the local and total skin friction coefficient,In addtion,somedrag formulae are analysed and compared.