This research showed a study of the aerodynamic characteristics
including the turbulent wake behind a twisted overhead
transmission line in comparison to the wake behind a cylindrical
transmission line. The study showed the effect of the shape of
the
twisted transmitter on the slow pattern and the boundary layer
separation and the shape of the wake. A difference was noted
between the two transmitters and especially the pressure distribution
and the resulting force. The study also dealt with the noise caused
by the flow; the twisted transmitter showed higher sound pressure
levels SPL compared to the cylindrical transmitter. This is due to
the boundary layer separation.