Direct numerical simulations (DNS) were used to study the
effects of periodic incoming wakes on the flow near the endwall
in a linear turbine cascade T106. The moving cylindrical
bars generating the wakes in the experiment were represented by
means of appropriate unsteady turbulent inflow conditions. In
the simulations, two cases, with and without incoming wakes,
were conducted at a Reynolds number of 90,000 based on chord
length and outlet velocity. The results were validated with experimental
data. Due to constructive limitations of the experimental
setup, the incoming boundary layer is very thin, so that
some features of the secondary flow are absent or small. Employing
phase-averaging, however, the periodic formation of vortical
structures caused by the wakes can be identified in the vicinity of
the endwall.
«Direct numerical simulations (DNS) were used to study the
effects of periodic incoming wakes on the flow near the endwall
in a linear turbine cascade T106. The moving cylindrical
bars generating the wakes in the experiment were represented by
means of appropriate unsteady turbulent inflow conditions. In
the simulations, two cases, with and without incoming wakes,
were conducted at a Reynolds number of 90,000 based on chord
length and outlet velocity. The results were validated with...
»