Numerical simulation of peat dust explosions

Lars Kjäldman

Research output: Book/ReportReport

Abstract

The goal of this work was to develop a numerical model for peat dust denagrations based on experiments done in a closed 20 dm3 spherical vessel. The gas-particle mixture is described as a continuous two-phase flow. The model includes drying, pyrolysis and combustion of the devolatilized gases and char. Local time dependent average values for the size and other properties of the particles are used. The results from the simulation are physically reasonable and promising. Reasons for the disagreements between the results from simulation and experiments are discussed and suggestions for further experimental research and model development are given. As an application the explosion of dry peal dust in a vented vessel is simulated. The extension of the model to strongly heterogenous mixtures with respect to particle size, moisture content or other properties is suggested and considered reasonable from both the modelling and computational points of view.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages84
ISBN (Print)951-38-2835-2
Publication statusPublished - 1987
MoE publication typeD4 Published development or research report or study

Publication series

SeriesValtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports
Number469
ISSN0358-5077

Fingerprint

explosion
peat
vessel
dust
two phase flow
gas
pyrolysis
simulation
moisture content
combustion
experiment
particle size
modeling
particle
development model
drying

Keywords

  • peat
  • dust explosions
  • simulation

Cite this

Kjäldman, L. (1987). Numerical simulation of peat dust explosions. Espoo: VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, No. 469
Kjäldman, Lars. / Numerical simulation of peat dust explosions. Espoo : VTT Technical Research Centre of Finland, 1987. 84 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 469).
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Kjäldman, L 1987, Numerical simulation of peat dust explosions. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, no. 469, VTT Technical Research Centre of Finland, Espoo.

Numerical simulation of peat dust explosions. / Kjäldman, Lars.

Espoo : VTT Technical Research Centre of Finland, 1987. 84 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 469).

Research output: Book/ReportReport

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N2 - The goal of this work was to develop a numerical model for peat dust denagrations based on experiments done in a closed 20 dm3 spherical vessel. The gas-particle mixture is described as a continuous two-phase flow. The model includes drying, pyrolysis and combustion of the devolatilized gases and char. Local time dependent average values for the size and other properties of the particles are used. The results from the simulation are physically reasonable and promising. Reasons for the disagreements between the results from simulation and experiments are discussed and suggestions for further experimental research and model development are given. As an application the explosion of dry peal dust in a vented vessel is simulated. The extension of the model to strongly heterogenous mixtures with respect to particle size, moisture content or other properties is suggested and considered reasonable from both the modelling and computational points of view.

AB - The goal of this work was to develop a numerical model for peat dust denagrations based on experiments done in a closed 20 dm3 spherical vessel. The gas-particle mixture is described as a continuous two-phase flow. The model includes drying, pyrolysis and combustion of the devolatilized gases and char. Local time dependent average values for the size and other properties of the particles are used. The results from the simulation are physically reasonable and promising. Reasons for the disagreements between the results from simulation and experiments are discussed and suggestions for further experimental research and model development are given. As an application the explosion of dry peal dust in a vented vessel is simulated. The extension of the model to strongly heterogenous mixtures with respect to particle size, moisture content or other properties is suggested and considered reasonable from both the modelling and computational points of view.

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Kjäldman L. Numerical simulation of peat dust explosions. Espoo: VTT Technical Research Centre of Finland, 1987. 84 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 469).