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)
1,2; Wachter, Simon 1,2; Fleck, Sabine 1,2; Kolb, Thomas 1,2,31 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
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
| 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 | Web of Science Scopus Dimensions |