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Study on Instantaneous Structure of Turbulent Pulverized Coal Flame by Simultaneous Measurement

동시계측에 의한 난류 미분탄 화염의 순간구조에 관한 연구

  • 황승민 (호서대학교 건축토목환경공학부 환경공학전공)
  • Received : 2018.03.27
  • Accepted : 2018.04.30
  • Published : 2018.05.31

Abstract

In this study, a laser sheet technique and PLIF (Planar laser-induced fluorescence) are applied to a laboratory-scale pulverized coal burner of the open type, and the spatial relationship of the pulverized coal particle zone and the combustion reaction zone is examined by simultaneous measurement of Mie scattering and OH-LIF images. It is found that this technique can be used to investigate the spatial relationship of the combustion reaction zone and pulverized-coal particles in turbulent pulverized-coal flames without disturbing the combustion reaction field. In the upstream region, the combustion reaction occurs only in the periphery of the clusters where high-temperature burned gas of the methane pilot flame is entrained and oxygen supply is sufficient. In the downstream region, however, combustion reaction can be seen also within clusters of pulverized-coal particles, since the temperature of pulverized-coal particles rises, and the mixing with emitted volatile matter and ambient air is promoted.

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