In order to achieve an increase in the overall thermodynamic efficiency of power plants it is necessary to optimize all components and incorporated machines. Here, the steam turbine plays a key role. Especially in the low pressure steam turbine considerable losses arise due to thermodynamic and kinematic relaxation after crossing the saturation lin...
Pixner, P.Krebs, W.Siemens AG Power Generation, Muelheim an...
Demands on modern gas turbine systems are high efficiency and low emissions. Due to that nearly all gas turbine systems use piloted premixed combustion. Modeling of combustion processes withComputational Flow Dynamics CFD suffers from the complexity of combustion chemistry. The direct application of kinetics leads to hugh and stiff differential equ...
Fruetel, V.Thiemann, T.Polklas, T.Becker, S.Siemens AG Power Generation, Muelheim an...
For the protection of resources and for the reduction of the environmental impacts it is necessary to further develop the transformation technologies of the fossil fuels still available on a long-term basis and above all to increase the efficiencies. With condensing turbines there is a still unused potential particularly in advancements of the over...
Das Ziel dieser Arbeiten war die Wahl von numerischen Algorithmen und Parametern, die zuverlaessige Simulationsergebnisse sichern. In dieser Phase wurden auch Computerprogramme zur Bearbeitung der instationaeren Daten entwickelt. Zu Vergleichszwecken wurden zuerst 18 stationaere Rechnungen fuer unterschiedliche Geometrie- und Stroemungskonfiguratio...