Journal of the Korean Society of Combustion (한국연소학회지)

The Korean Society of Combustion (한국연소학회)
권호 표지

Numerical Investigation on the Thermal Characteristics of Mild Combustion According to Co-axial Air

동축공기에 따른 Mild 연소의 열적 특성에 대한 수치연구

  • 황창환 (한국과학기술원 기계항공 시스템 공학부) ;
  • 백승욱 (한국과학기술원 기계항공 시스템 공학부) ;
  • 김학영 (한국과학기술원 기계항공 시스템 공학부)
  • Received : 2010.08.24
  • Accepted : 2010.10.22
  • Published : 2010.12.31
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Abstract

Mild combustion is considered as a promising combustion technology for energy saving and low emission of combustion product gases. In this paper, the controllability of reaction region in mild combustion is examined by using co-axial air nozzle. For this purpose, numerical approach is carried out. Propane is considered for fuel and air is considered for oxidizer and the temperature of air is assumed 900K slightly higher than auto ignition temperature of propane. But unlike main air, the atmospheric condition of co-axial air is considered. Various cases are conducted to verify the characteristics of Co-Axial air burner configuration. The use of coaxial air can affect reaction region. These modification help the mixing between fuel and oxidizer. Then, reaction region is reduced compare to normal burner configuration. The enhancement of main air momentum also affects on temperature uniformity and reaction region. The eddy dissipation concept turbulence/chemistry interaction model is used with two step of global chemical reaction model.

Keywords

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