Soot formation and flame characterization of an aero-engine model combustor burning ethylene at elevated pressure

TitleSoot formation and flame characterization of an aero-engine model combustor burning ethylene at elevated pressure
Publication TypeJournal Article
Year of Publication2014
AuthorsGeigle, KP, Hadef, R, Meier, W
Journal TitleJournal of Engineering for Gas Turbines and Power
Volume136
Issue2
Pages021505
Abstract

Swirl-stabilized, nonpremixed ethylene/air flames were investigated at pressures up to 5bar to study the effect of different operating parameters on soot formation and oxidation.Focus of the experiments was the establishment of a database describing well-definedflames, serving for validation of numerical simulation. Good optical access via pressurechamber windows and combustion chamber windows enables application of laserinducedincandescence to derive soot volume fractions after suitable calibration. Thisresults in ensemble averaged, as well as instantaneous soot distributions. Beyond pressure,parameters under study were the equivalence ratio, thermal power, and amount ofoxidation air. The latter could be injected radially into the combustor downstream of themain reaction zone through holes in the combustion chamber posts. Combustion air wasintroduced through a dual swirl injector whose two flow rates were controlled separately.The split of those air flows provided an additional parameter variation. Nominal powerof the operating points was approximately 10 kW/bar leading to a maximum power ofroughly 50 kW, not including oxidation air.

URLhttp://dx.doi.org/10.1115/1.4025374
DOI10.1115/1.4025374