Abstract:
Summary. In two-dimensional potential flow the combination of a source and a free vortex produces an axis-symmetric flow with streamlines in the form of equiangular spirals. Calculations have been made of the turbulent boundary layer developing beneath such a flow and the results have been compared with measurements made elsewhere. The method of calculation used is essentially that described earlier by Cumpsty and Head, integral equations of momentum and entrainment being satisfied in a streamline co-ordinate system.
