Zusammenfassung
CFD-Simulationen von kohlebeschickten Vergasern erfordern mehrere fortschrittliche mathematische Modelle, um die komplexen, mehrphasigen, reaktiven Strömungssysteme zu beschreiben. Insbesondere die Pyrolyse und die heterogenen Verbrennungs- und Vergasungsreaktionen des Kokses sind entscheidend für die akkurate Beschreibung des Vergasungsverhaltens. Dieser Abschnitt zeigt, wie fortschrittliche Kohlekonversionsmodelle für die Pyrolyse und die Kokskonversion mit der CFD gekoppelt werden können, mit dem Ziel korrekte Simulationen durchzuführen und die benötigten Rechenressourcen zu limitieren. Die Ergebnisse werden abschließend durch den Vergleich mit zwei Vergasungstests, die mit Kohlen unterschiedlichen Inkohlungsgrads (high-rank semi-anthracite bis low-rank lignite) durchgeführt wurden, validiert.
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Vascellari, M., Hildebrandt, K., Hasse, C. (2018). Virtualisierung von Hochtemperaturprozessen. In: Krzack, S., Gutte, H., Meyer, B. (eds) Stoffliche Nutzung von Braunkohle. Springer Vieweg, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-46251-5_22
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