TY - JOUR
T1 - Nucleating unsteady flows in low-pressure steam turbine stages
AU - Winkler, G.
AU - Schnerr, G. H.
PY - 2001
Y1 - 2001
N2 - The present paper deals with the detailed numerical investigation of transonic, turbulent, unsteady two-phase steam flows with internal heat addition after partial condensation of the working fluid. The observed phenomena include homogeneously, homogeneously-heterogeneously and heterogeneously dominated condensation effects. The results concerning the different condensation mechanisms are initially discussed in terms of the turbulent, transonic flow through Laval nozzles. Further, an interesting phenomenon of nucleation and droplet growth inside turbulent boundary layers is presented. Application to transonic turbine flows in the rotor cascade VKI-1 shows the influence of homogeneous nucleation on the turbulent shock-boundary layer interaction. Finally, the different types of condensation models were compared to investigate the two-dimensional transonic two-phase flow in an entire turbine stage including high-frequency rotor-stator interactions.
AB - The present paper deals with the detailed numerical investigation of transonic, turbulent, unsteady two-phase steam flows with internal heat addition after partial condensation of the working fluid. The observed phenomena include homogeneously, homogeneously-heterogeneously and heterogeneously dominated condensation effects. The results concerning the different condensation mechanisms are initially discussed in terms of the turbulent, transonic flow through Laval nozzles. Further, an interesting phenomenon of nucleation and droplet growth inside turbulent boundary layers is presented. Application to transonic turbine flows in the rotor cascade VKI-1 shows the influence of homogeneous nucleation on the turbulent shock-boundary layer interaction. Finally, the different types of condensation models were compared to investigate the two-dimensional transonic two-phase flow in an entire turbine stage including high-frequency rotor-stator interactions.
KW - Condensation models
KW - Low-pressure steam turbine stages
KW - Nucleating unsteady flows
KW - Rotor-stator interactions
KW - Transonic two-phase flow
KW - Turbulent boundary layers
UR - http://www.scopus.com/inward/record.url?scp=0035706853&partnerID=8YFLogxK
U2 - 10.1243/0957650011538901
DO - 10.1243/0957650011538901
M3 - Article
AN - SCOPUS:0035706853
SN - 0957-6509
VL - 215
SP - 773
EP - 781
JO - Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy
JF - Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy
IS - 6
ER -