Experimental and computational study on partially premixed flames in a centerbody burner

Investigation of soot formation in pressurized swirl flames by laser measurements of temperature, flame structures and soot concentrations

“…complexity both experimentally and computationally. Experimental characterization of turbulent sooting flames either focuses on sub-processes [1,2], or quickly becomes too complex to serve for model validation. Very complex technical cases like fully-technical or industrial combustors [3], are rather used to monitor the overall behavior.…”

A computational study of extinguishment and enhancement of propane cup-burner flames by halon and alternative agents

“…Radiation from CH 4 , CO, CO 2 , H 2 O, HF, COF 2 and soot was considered in the present study. The Plank-mean absorption coefficients are obtained from the literature for the first four species [12] and HF [13]; or calculated for COF 2 [13] and soot [14]. The finite-difference forms of the momentum equations are obtained using an implicit QUICKEST scheme [9], and those of the species and energy equations are obtained using a hybrid scheme of upwind and central differencing.…”

“…A comprehensive reaction mechanism was assembled for the simulation of propane or ACT fuel flames with CF 3 Br, C 2 HF 5 , C 2 HF 3 Cl 2 , or C 3 H 2 F 3 Br added to air from four mechanisms: the four-carbon hydrocarbon mechanism of Wang and co-workers [15,16] (111 species and 1566 one-way elementary reactions), detailed reactions of ethanol (5 species and 72 reactions) of Dryer and co-workers [17,18], the bromine and chlorine parts of the mechanism of Babushok et al [19–22] (10 additional species and 148 reactions), and a subset (51 species and 1200 reactions) of the National Institute of Standards and Technology (NIST) HFC starting mechanism [23, 24]. The final chemical kinetics model (187 species, 3198 reactions for CF 3 Br, C 2 HF 5 , and C 3 H 2 F 3 Br; or 241 species and 3918 reactions for C 2 HF 3 Cl 2 ) and a soot model [14] are integrated into the UNICORN code. Transport data for 139 species are available in the literature; for the remaining 38 species, data are constructed by matching these species with the nearest species (based on molecular weight) with known transport data.…”

Evaluation of a Lagrangian Soot Tracking Method for the prediction of primary soot particle size under engine-like conditions

“…In the LST framework, the soot particles are treated as Lagrangian particles and can be tracked individually. The LST method has been used to investigate soot transport in various combustion applications (Fuentes et al, 2007;V R Katta et al, 2011;Viswanath R Katta, Blevins, & Roquemore, 2005;Mahmood, LaRocca, Shayler, Bonatesta, & Pegg, 2012;F Piscaglia, Onorati, Rutland, & Foster, 2009;Federico Piscaglia, Rutland, & Foster, 2005;P. Zhang, Roberts, & Benard, 2012;Zuber et al, 2015).…”

“…It is worth mentioning that these works did not include oxidation effects on their Lagrangian soot particles. In a later study, the soot tracking model (Katta et al, 2011;Roquemore et al, 2009) was improved by considering the effect of soot oxidation. A soot burnout model was introduced such that the fictitious soot particles were deleted when they entered temperature regions above 1300K (Roquemore et al, 2009) or above 1400K (Katta et al, 2011).…”