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M. Obermüller, K.-J. Schmidt, H. Schulte, D. Peitsch
As the first component following the air intake, the gas turbine?s compression system can encounter a significant amount of liquid water in the gas path flow during operation, affecting its thermodynamics, aerodynamics and mechanics in various ways. In order to estimate the impact of liquid water on the system behavior prior or parallel to engine testing, modeling capability for such droplet-laden flows is crucial for development tools in gas turbine industry. This paper presents a summary of the most important facts concerning compression of liquid-water two-phase flow in aircraft and stationary gas turbine engines. As an introduction to the topic some general information on phenomena involving wet compression are provided, followed by a description of the physical effects and interactions due to the presence of a liquid water phase in the compressor geometry. In a next step, the state-of-the-art modeling strategies for wet compression with respect to engine performance calculations are outlined, categorized and evaluated concerning their validity. The latter takes into account a comprehensive collection of experimental data available from scientific literature, that has formed the basis for model validation in the past. The advantages and limitations of the different approaches are discussed and ideas for further improvement of modeling are presented.
Deutscher Luft- und Raumfahrtkongress 2012, Berlin
Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn, 2012
21,0 x 29,7 cm, 26 Seiten
Stichworte zum Inhalt:
aerodynamics, air intakes, engine tests, Feuchte Verdichtung, gas turbines, thermodynamics, two phase flow, water, Zweiphasenströmung