Paper presented at the 5th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, South Africa, 1-4 July, 2007.
A numerical investigation is carried out for turbulent
droplet-laden flow of saturated steam produced in a steam
generator (SG) that feeds steam turbine (ST) through a long
and multi-bend steam piping. The main purpose of the study
is to analyze deposition of droplets that form a wall film in
the piping system. Two tasks were performed: parametric
study of the deposition in 90° elbows and the deposition in a
more complex piping system. This system starts with outlets
from the steam generator with five mouthpieces leading to a
collector pipe and connecting the steam piping leading to a
steam turbine. Results of the simulations show where
droplets deposit and where a liquid separator should be
placed to drain away the water film and to avoid droplets
from entering the steam turbine. Dynamic temporal
development of the film is presented showing mutual impact
of gravity and entrainment by the co-flowing steam.
