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Full-Text Articles in Mechanical Engineering
Ignition And Combustion Properties Of Pulverized Coal Suspended In Laminar Upward Flow Under High Heating Rate Condition, Masayuki Taniguchi, John C. Chen, Kiyoshi Narato, Kazuyuki Ito, Hiroshi Miyadera, Kazuhiko Kudo
Ignition And Combustion Properties Of Pulverized Coal Suspended In Laminar Upward Flow Under High Heating Rate Condition, Masayuki Taniguchi, John C. Chen, Kiyoshi Narato, Kazuyuki Ito, Hiroshi Miyadera, Kazuhiko Kudo
Mechanical Engineering
Ignition and combustion behaviors were observed for pulverized coal particles which were suspended in a laminar upward flow and were heated by a single pulse Nd : YAG laser. The surface temperature of the particles was estimated to increase at a rate of about 106K/s. For a bituminous coal, observations with high-speed video revealed that the coal particles ignited heterogeneously 1-2ms after the laser pulse operation and this was followed by the evolution of volatile materials and their combustion in the gas phase. A rate constant of surface oxidation reaction of the bituminous coal at a temperature range …