Computational Analysis of Wind Energy Input into Overhead Power Lines:
Alternate shedding of vortices from the top and bottom of a conductor in
a flow of wind causes Aeolian vibrations in overhead lines. Energy
transfer to the conductors are calculated using the energy balance
method. Simulation of wind power input into a harmonically oscillating
cylinder by a turbulent flow is solved by numerical integration of the
Naiver-Stokes equations using a numerical simulation tool. The results
show that the assumption of lock-in phenomenon has oscillatory behaviour
at lower amplitude to diameter (A/d) ratios for forced cylinder motion.
Numerical results are in good agreement in the laminar case and k-ω SST
turbulent case with measurements. The relationship between cylinder
motion and vortex shedding is unsteady resulting in lower power transfer
to the cylinder. The vortex shedding frequency oscillates with 10%
turbulent intensity and length scales of 25 mm, 50 mm and 75 mm.