Investigation of a High Karlovitz, High Pressure Premixed Jet Flame with Heat Losses by LES

Laser diagnostic investigation of a confined premixed turbulent jet flame stabilized by recirculation

“…The combustion was not flameless, however, there were clear indications of autoignition in the mixing zone of recirculated and fresh gas. In a numerical study of this flame, Gruhlke et al concluded that the flame is stabilized by propagation assisted by autoignition [18].…”

“…The burner has been operated in a high-pressure test-rig in various configurations [15][16][17] and recently in a configuration with a single large nozzle that was placed out of axis in a square combustion chamber, see Fig. 2 [18][19][20][21][22]. The single-nozzle burner mimics to a certain extent one section of the circularly arranged FLOX® combustor.…”

LES Analysis of CO Emissions from a High Pressure Siemens Gas Turbine Prototype Combustor at Part Load

“…In the Siemens test facility Clean Energy Center (CEC), many staged part load operation conditions of a prototype gas turbine combustor were tested, showing different carbon monoxide levels at the probe location. In this work, a validated LES combustion modeling approach [20] is applied for a predictive study of a high pressure full scale technology prototype Siemens combustion system at part load to reveal sources leading to incomplete CO burnout observed at two of the tested operating conditions, with the focus on the following goals: (i) to demonstrate the ability to predict CO from a very complex full scale combustor and, (ii) to investigate the impact of mixture formation in the different fuel stages on CO and, (iii) to analyze the effect of local flame quenching due to secondary air on CO.…”