• Title/Summary/Keyword: LeeRyang

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Ignition Behavior of Single Coal Particles From Different Coal Ranks at High Heating Rate Condition

  • Lee, Dongfang;Kim, Ryang Gyoon;Jeon, Chung-Hwan
    • 한국연소학회:학술대회논문집
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    • 2012.11a
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    • pp.111-114
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    • 2012

  • The ignition behavior of single coal particles of five kindes of coal with different ranks (low volatile bituminous, low volatile sub-bituminous, high volatile bituminous, lignite) with particle size of $150-200{\mu}m$ was investigated at high heating rate condition. Particles were injected into a laminar flow reactor and the ignition behavior was observed with high speed cinematography. Sub-bituminous were observed to ignite homogeneously; however, low volatile bituminous coal and lignite undergo fragmentation prior to igntion. The observation was analyzed with previous work.

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Span-to-Depth Ratio Equation for Reinforced Concrete Floor Members (콘크리트 바닥부재 설계를 위한 최소두께 산정식 제안)

  • Lee, Young-Hak;Chung, Kwang-Ryang;Choi, Bong-Seob
    • Proceedings of the Korea Concrete Institute Conference
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    • 2005.11a
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    • pp.205-208
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    • 2005

  • A single span-to-depth ratio function is proposed for control of deflection in one-way concrete construction. The equation can be applied to one-way slabs, beams, and flat plates. Effects of cracking, time-dependent deformation, boundary conditions, applied loading, and target deflection-to-span ratio are taken into account.

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