Ignition of Slurry Fuel Droplets with Different Heating Conditions

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Abstract

This paper describes modern research methods of the ignition and combustion processes of slurry fuel droplets. The experiments were carried out using a muffle furnace to ensure the conditions of radiation heating, the hot surface to reproduce the conditions of conductive heating, the high-temperature channel with convective heating, the chamber with the processes of soaring, i.e., a significant increase in the time of fuel residence in the combustion chamber. We identified the differences in combustion modes, threshold ignition temperatures, delay times and durations of combustion processes. We obtained the quantitative differences in the characteristics of the ignition and combustion processes for typical registration methods. It was found that for all heating schemes, the minimum ignition temperatures have comparable values. Minimum ignition delay times were recorded during convective heating. The maximum combustion temperatures were achieved with radiation heating. We determined the values of limiting heat fluxes, suficient to initiate the combustion of slurries fuels during conductive, convective and radiative heating.

Original languageEnglish
Article number4553
JournalEnergies
Volume12
Issue number23
DOIs
Publication statusPublished - 2019

Keywords

  • Combustion
  • Droplet
  • Heating schemes
  • Ignition
  • Particle
  • Slurry fuel

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Control and Optimization
  • Electrical and Electronic Engineering

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