대한기계학회논문집 (Transactions of the Korean Society of Mechanical Engineers)

대한기계학회 (The Korean Society of Mechanical Engineers)
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CWS액적의 증발 및 점화에 관한 실험적 연구

An Experimental Study on the Evaporation and Ignition of CWS Droplets

  • 안국영 (한국기계연구원 연소.전열연구실) ;
  • 백승욱 (한국과학기술원 항공우주공학과) ;
  • 김관태 (한국기계연구원 연소 전열연구실)
  • 발행 : 1993.05.01
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초록

본 연구에서는 CWS액적을 대상으로 주위 분위기 조건등에 대하여 점화등의 연소현상을 평가하기 위한 실험장치를 구성하고 일련의 실험을 수행하였다.

Coal-Water slurry (CWS) is a new potential form of fuel for use in power plants and industrial furnaces. The evaporation and ignition characteristics of CWS have been studied in the post-flame region generated by a flat flame burner. Individual droplets with initial diameters of 1-3mm were supported around the thermocouples and raidly exposed to a hot gas stream. The gas temperature ranged between $950^{\circ}C$ and 1600.deg. C at atmospheric pressure. The effect of droplet size, gas temperature and radiative heat transfer by screen were studied experimentally. The ignition criterion was either a rapid temperature rise in time-temperatuire curves or onset of visible flame in experiment. Incresing the gas temperature or decreasing the droplet size reduced the time required for evaporation and ignition.

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