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

Fuel, ISSN: 0016-2361, Vol: 304, Page: 121392
2021
  • 7
    Citations
  • 0
    Usage
  • 13
    Captures
  • 1
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    7
    • Citation Indexes
      7
  • Captures
    13
  • Mentions
    1
    • News Mentions
      1
      • News
        1

Most Recent News

Studies from Karlsruhe Institute of Technology (KIT) Provide New Data on Fuel Research (Experimental Investigation On Entrainment In Two-phase Free Jets)

2023 MAR 27 (NewsRx) -- By a News Reporter-Staff News Editor at Energy Daily News -- Fresh data on Energy - Fuel Research are presented

Article Description

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. Simulation results are approved for a set of experimental data (i.e. droplet velocity, droplet size distribution and flame structure via OH*-chemiluminescence imaging) from the bench-scale atmospheric entrained flow gasifier REGA.

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