Pollutant Formation and Noise Emission in Turbulent Diffusion Flames
The accurate prediction of combustion processes in§turbulent §reacting flows is essential for the design of§advanced combustion §technologies. Numerical simulation techniques become§viable tools §to address such design challenges if adequate models§are available. §In this work, computational models are developed for§application to §large-eddy simulation (LES). In particular, three§critical modeling §aspects are considered, namely local flame extinction§and reignition, §nitrogen oxide formation, and noise-generation by§combustion. §These models are integrated into the§flamelet/progress variable §formulation, thus allowing for a consistent treatment§of different §combustion-physical effects in a unified framework. The §computational models are analyzed in a priori studies§and applied to §LES for different flame configurations, including§turbulent jet flames §and a realistic aircraft engine combustor. All LES§models are §validated using experimental data, and the underlying§physical §phenomena are discussed in great detail.