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Abstract <p>This study investigates the ignition of pine sawdust (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(d &lt; 200\)</EquationSource> <!--CESW2670011Aduev-m1--> </InlineEquation> µm) and mixtures of brown coal particles (<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(d &lt; 3\)</EquationSource> <!--CESW2670011Aduev-m2--> </InlineEquation> mm) and pine sawdust in a fluidized bed using local radiation from a continuous-wave semiconductor laser (<InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\lambda = 450\)</EquationSource> <!--CESW2670011Aduev-m3--> </InlineEquation> nm) with a power of ≤23 W and with an exposure time sufficient for ignition and flame propagation over the fuel surface until self-sustaining combustion is established. The dependences of the time to reach self-sustaining combustion and the mass of sawdust completely burned within 60 s at a fixed radiation power on the air flow rate through the fluidized bed, the dependence of the time to reach self-sustaining combustion of sawdust on the radiation power at a fixed air flow rate, and the dependence of the time to reach self-sustaining combustion of a sawdust–mixture coal on the coal mass content (within <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(30{-} 80\)</EquationSource> <!--CESW2670011Aduev-m4--> </InlineEquation>%) at a fixed radiation power of 23 W are determined. The optimal conditions for self-sustaining combustion of solid fuel in a fluidized bed under the influence of laser radiation are identified.</p>

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Ignition of Fluidized Solid Fuel by Laser Radiation

  • 期刊论文

  • 发表日期：

    2026年4月1日

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  • B. P. Aduev,
  • G. M. Belokurov,
  • I. Yu. Liskov,
  • D. R. Nurmukhametov

摘要

Abstract

This study investigates the ignition of pine sawdust ( \(d < 200\) µm) and mixtures of brown coal particles ( \(d < 3\) mm) and pine sawdust in a fluidized bed using local radiation from a continuous-wave semiconductor laser ( \(\lambda = 450\) nm) with a power of ≤23 W and with an exposure time sufficient for ignition and flame propagation over the fuel surface until self-sustaining combustion is established. The dependences of the time to reach self-sustaining combustion and the mass of sawdust completely burned within 60 s at a fixed radiation power on the air flow rate through the fluidized bed, the dependence of the time to reach self-sustaining combustion of sawdust on the radiation power at a fixed air flow rate, and the dependence of the time to reach self-sustaining combustion of a sawdust–mixture coal on the coal mass content (within \(30{-} 80\) %) at a fixed radiation power of 23 W are determined. The optimal conditions for self-sustaining combustion of solid fuel in a fluidized bed under the influence of laser radiation are identified.