An algebraic turbulence model modified for extra rates of strain in an axisymmetric boundary layer

A standard two-piece algebraic turbulence model is modified to account for transverse and longitudinal extra rates of strain which are important in the tail region of an axisymmetric boundary layer. The modified model contains one empirical constant which is determined with the aid of experimental data. For three bodies of revolution having different longitudinal curvature histories, boundary layer solutions with the modified and unmodified models are compared with detailed measurements. Incorporation of the two extra rates of strain is found to considerably improve agreement with the data in the tail region.