© 1954 by Oxford University Press
A VORTICAL SINGULARITY IN CONICAL FLOW
( Armament Research Establishment Fort Halstead, Kent )
The singular line introduced by Ferri in the supersonic flow past a yawed cone is analysed. It is shown that such a singularity can arise only at points where the velocity is directed along the radial line, that at the singularity the velocity is many-valued, the vorticity is infinite but the pressure is single-valued. The singularity can be fitted to a general field of conical flow behind a shock. Flow in its neighbourhood can be regarded physically as that due to a pencil of vortex sheets of varying strength.