S. Ruoff, B. Enderle, G. Eckel, B. Rauch, T. Methling, P. Le Clercq

One source of input uncertainties in the simulation of turbulent spray combustion is introduced by the choice of surrogate species, which link the liquid and the gaseous phase. To support the certification of novel jet fuels and enhance the predictive capabilities of such simulations, output uncertainties should be disclosed. Therefore, the paper at hand quantifies the impact of the choice of surrogate species on typical flame characteristics (laminar flame speed, ignition delay times) in simplified 0-D and 1-D flames. On the basis of the results two cases are selected to determine the impact of the uncertainties in the laminar flame speeds on a flame in an atmospheric, generic, swirl-stabilized spray burner. The uncertainties are propagated by adjusting the Arrhenius coefficients of the utilized chemical reaction mechanism. As a result, the heat release zone in the combustion chamber is closer to the burner inlet for greater laminar flame speeds, and thus the flame is more compact.

Deutscher Luft- und Raumfahrtkongress 2022, Dresden

Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn, 2022

Conference Paper

englisch

21,0 x 29,7 cm, 7 Seiten

urn:nbn:de:101:1-2022102816260134411096

10.25967/570126

Uncertainity Quantification, CFD, Multiphase Combustion, Surrogate Species

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Ruoff, S.; Enderle, B.; et al. (2022): Uncertainty Quantification in Reacting Flows. Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V.. (Text). https://doi.org/10.25967/570126. urn:nbn:de:101:1-2022102816260134411096.

28.10.2022