대한기계학회:학술대회논문집 (Proceedings of the KSME Conference)

대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지

고온 공기와 선회수에 의한 동축 분류 화염의 연소 특성

Combustion characteristics of coaxial diffusion flame with high preheated and swirled air

  • 김진식 (부산대학교 대학원 기계공학과) ;
  • 곽지현 (부산대학교 대학원 기계공학과) ;
  • 전충환 (부산대학교 기계공학부, 기계기술연구소) ;
  • 장영준 (부산대학교 기계공학부, 기계기술연구소)
  • 발행 : 2001.11.01
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초록

An experiment using high preheated and swirled air in the coaxial diffusion flame burner was carried out in order to decrease NOx emission and improve the thermal efficiency. $N_2$ gas was used for diluent and propane was utilized for fuel. Combustion using high preheated air has two remarkable characteristics ; (1) low NOx emission with increasing dilution level, (2) high thermal efficiency in the furnace. Also, swirled air can mix fuel and oxidizer well in condition of diffusion flme and maintain the stable combustion. The color of flame changes from yellow to blue green according to increasing the dilution level of mixture gas. NO emission decreased with increasing dilution level and the swirl number.

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