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Two-phase free jet model of an atmospheric entrained flow gasifier

Hotz, Christian 1,2; Haas, Manuel 1,2; Wachter, Simon 1,2; Fleck, Sabine 1,2; Kolb, Thomas 1,2,3
1 Institut für Technische Chemie (ITC), Karlsruher Institut für Technologie (KIT)
2 Institut für Technische Chemie und Polymerchemie (ITCP), Karlsruher Institut für Technologie (KIT)
3 Engler-Bunte-Institut (EBI), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

We present a steady-state two-phase fluid dynamic model based on a classical free jet approach for the simulation
of the main reaction zone in an atmospheric entrained flow gasifier. Radial Gaußian profiles of the mixing ratio
and velocity for single-phase free jets taken from literature are adapted to the two-phase free jet. Exchange of
momentum and mass between the jet and the surrounding is described by a parameter derived from atomization
experiments under ambient conditions. With the free jet equations, a pattern of gas phase velocity and temperature
is calculated. Droplets are introduced at the nozzle, accelerated, heated up and evaporated. Initial
droplet size fractions are measured under ambient conditions. Sub-process models for fuel decomposition,
oxidation and the water gas shift reaction are included in the model. The interaction of the sub-process models
and the free jet equations are considered via balance equations for momentum, mass and enthalpy, solved in each
control volume. The two-phase free jet model (2Ph-FJM) calculates the local composition, velocity and temperature
of the gas phase as well as velocity, temperature and evaporation of the fuel droplet fractions. ... mehr


Postprint §
DOI: 10.5445/IR/1000136450/post
Veröffentlicht am 16.08.2022
Originalveröffentlichung
DOI: 10.1016/j.fuel.2021.121392
Scopus
Zitationen: 5
Web of Science
Zitationen: 3
Dimensions
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Engler-Bunte-Institut (EBI)
Institut für Technische Chemie (ITC)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 11.2021
Sprache Englisch
Identifikator ISSN: 0016-2361
KITopen-ID: 1000136450
HGF-Programm 38.05.01 (POF IV, LK 01) Anthropogenic Carbon Cycle
Erschienen in Fuel
Verlag Elsevier
Band 304
Seiten Art.-Nr.: 121392
Vorab online veröffentlicht am 15.08.2021
Schlagwörter Two-phase free jet; Fluid dynamic modeling; Entrained flow gasification; Flame structure; Phase Doppler anemometry; OH*-chemiluminescence
Nachgewiesen in Dimensions
Web of Science
Scopus
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