Assessment of a novel numerical model for combustion and in-flight heating of particles in an industrial furnace

H. Gerhardter, R. Prieler, B. Mayr, M. Landfahrer, M. Mühlböck, P. Tomazic, C. Hochenauer

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The key factors for efficient in-flight particle heating in a combusting flow were investigated within this paper for the development of a novel boiler slag bead production furnace. A natural gas fired industrial burner with a thermal input of 1.2MW was thus evaluated using Computational Fluid Dynamics (CFD). The steady laminar flamelet model (SFM) and a detailed chemical reaction mechanism, considering 25 reversible chemical reactions and 17 species were used to account for the steady-state gas phase combustion. Measurements of gas temperature and flow velocity within the furnace were found to be in good accordance with the numerical results. In the second step, sintered bauxite beads were injected into the furnace as an experimental material and heated up in flight. The particle heating characteristics were investigated using the Discrete Phase Model (DPM). The computational results of the particle laden flow raised the issue that convective heat transfer is a key factor for efficient particle heating. At the burner chamber outlet, the temperature of a particle which had been injected into the burner flame was 178K higher compared to a particle, which trajectory led through zones with lower gas temperatures.

Original languageEnglish
Pages (from-to)817-827
JournalJournal of the Energy Institute
Volume91
Issue number6
DOIs
Publication statusPublished - 2018

Fingerprint

Industrial furnaces
Fuel burners
furnaces
Numerical models
Furnaces
flight
Heating
burners
heating
Chemical reactions
Gases
gas temperature
beads
chemical reactions
Flow velocity
Temperature
Slags
Boilers
Natural gas
Computational fluid dynamics

Keywords

  • Combustion modeling
  • Computational fluid dynamics
  • Discrete phase model
  • Particle heat transfer

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Assessment of a novel numerical model for combustion and in-flight heating of particles in an industrial furnace. / Gerhardter, H.; Prieler, R.; Mayr, B.; Landfahrer, M.; Mühlböck, M.; Tomazic, P.; Hochenauer, C.

In: Journal of the Energy Institute, Vol. 91, No. 6, 2018, p. 817-827.

Research output: Contribution to journalArticleResearchpeer-review

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