ZURUECK HOCH VOR INHALT SUCHEN

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Proposing Institution

Institut für Technische Verbrennung, RWTH Aachen
Project Manager

Lukas Berger
Templergraben 64
52056 Aachen
Abstract
Gas turbines are a crucial contributor to the world’s power capacity. In the future, the role of gas turbines in electricity generation in Germany will become even more important, as gas turbine power plants have been identified as a potential replacement for nuclear power plants. The vision “Energiekonzept 2050“ by the German government emphasizes the importance of stationary gas turbines as it aims to increase the share of renewable energy. Therefore, it is crucial to reduce pollutant emissions from future gas turbines, which are operated under lean premixed conditions. Work performed during the last decades has particularly focused on the reduction of nitrogen oxides (NOx) since NOx has significant influence on the environment and on humans. Potential consequences of increased ambient NOx concentrations are the production of tropospheric ozone (summer smog), which is harmful to humans, and ozone depletion in the stratosphere, which contributes to climate change. Currently, the use of CFD (Computational Fluid Dynamics) is gaining importance in the design of modern gas turbine combustors in order to realize the full potential of low emissions combustion systems. Nonetheless, the increased use of CFD as a design tool for future gas turbines requires models that are accurate yet affordable.Rapid advances in supercomputing make DNS (Direct Numerical Simulation) a powerful tool in combustion science and enable the simultaneous simulation of turbulence and chemistry as well as the analysis of their interaction. However, the profound lack of high quality experimental or DNS data for complex NOx chemistry is the main impediment for developing models. In the proposed project, we perform large-scale DNS of turbulent premixed lean methane flames including detailed NOx chemistry. The DNS data will enable the development of LES models for pollutant emissions in turbulent flames and will be made available to other research groups. This project will shed light on the interaction of turbulence and NOx chemistry and contribute to a better understanding of turbulent combustion. In a subsequent project, the same data will be used to study CO formation.

Impressum, Conny Wendler