At the Institute of Thermal Turbomachinery and Machniery Laboratory (ITSM) a generic test case was designed to investigate aeromechanical phenomena and condensation in low-pressure steam turbines. This test case, referred to as Steam turbine Test case for Aeromechanics and Condensation (STAC) consists of the two last stages of a low-pressure steam turbine and is representative for a modern steam turbine design. STAC is intended to serve as a numerical test case to allow studying the fields of aerodynamic damping and spontaneous condensation in low-pressure steam turbine last stages. The geometry of the turbine is made available online at www.itsm.uni-stuttgart.de/research/test-cases/.
Petrie-Repar P, Fuhrer C, Grübel M, et al. Two-dimensional steam turbine flutter test case. In: Proceedings of the 14th International symposium on unsteady aerodynamics, aeroacoustics & aeroelasticity of turbomachines, Stockholm, Sweden, September 2015.
2.
Burton Z. Durham steam turbine exhaust diffuser test case technical notes. Technical report, Durham University, 2013.
3.
Fuhrer C and Vogt DM. On the impact of simulation approaches on the predicted aerodynamic damping of a low pressure steam turbine rotor. In: Proceedings of ASME turbo expo 2017, June: turbomachinery technical conference and exposition, Charlotte, North Carolina, USA. GT2017-63401.
4.
StarzmannJHughesFRWhiteAJ, et al.Results of the international wet steam modeling project. Proc IMechE, Part A: J Power and Energy2018; 232: 550–570.
5.
HughesFRStarzmannJWhiteAJ, et al.A comparison of modeling techniques for polydispersed droplet spectra in steam turbines. Trans ASME J Eng Gas Turb Power2016; 138: 042603-1-042603–9.
6.
Fuhrer C, Grübel M and Vogt DM. The influence of non-equilibrium wet steam effects on the aeroelastic properties of a turbine blade row. In: Proceedings of ASME turbo expo 2016, June, Seoul, South Korea. GT2016-57899.
7.
DentonJD. Multall: an open source, computational fluid dynamics based, turbomachinery design system. Trans ASME J Turbomach2017; 139: 121001-1-121001–12.
8.
HavakechianSDentonJ. Three-dimensional blade stacking strategies and understanding of flow physics in low-pressure steam turbines – part 1: three-dimensional stacking mechanisms. J Eng Gas Turbine Power2016, pp. 138: 052603-052603-10, .
9.
HavakechianSDentonJ. Three-dimensional blade stacking strategies and understanding of flow physics in low-pressure steam turbines – part 2: stacking equivalence and differentiators. J Eng Gas Turbine Power2016, pp. 138: 062601-062601-13.
10.
GerberAG. Inhomogeneous multifluid model for prediction of nonequilibrium phase transition and droplet dynamics. Trans ASME J Fluids Eng2008; 130: 1–11.
11.
BakhtarFYoungJBWhiteAJ, et al.Classical nucleation theory and its application to condensing steam flow calculations. Proc IMechE, Part C: J Mechanical Engineering Science2005; 219: 1315–1333.
12.
GrübelMStarzmannJSchatzM, et al.Modelling of condensing steam flows in Laval nozzles with ANSYS CFX. Proc IMechE, Part A: J Power and Energy2018; 232: 571–575.
13.
YoungJB. The spontaneous condensation of steam in supersonic nozzles. PhysicoChemical Hydrodynam1982; 3: 57–82.
14.
Gyarmathy G. Grundlagen einer Theorie der Naßdampfturbine. Dissertation, ETH Zürich, 1962.
