An experimental study is made for the turbulent boundary layer on the rotating cone in the axial uniform stream. Measurements of the mean velocity distributions were made at various values of the surface-to-free stream velocity ratio λb for two different cone vertex angles, 0=15°and 30°. In the polar diagram of the mean velocity distributions, the profiles are not only dependent on the local velocity ratio λ but also on θ and Rw, where Rw is the Reynolds number based on the wall velocity. The distributions of the swirl flow Richardson number reveal that the destabilizing effect of the centrifugal force is considerably stronger at θ=15°than at θ=30°. Discussions of the logarithmic velocity distributions are made for the azimuthal and the meridian velocity components as well as for the resultant velocity.
