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Combustion and Radiation Characteristics of Oxygen-Enhanced Inverse Diffusion Flame
Sang Soon Hwang,Jay P Gore 대한기계학회 2002 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.16 No.9
The characteristics of combustion and radiation heat transfer of an oxygen-enhanced diffusion flame was experimentally analyzed. An infrared radiation heat flux gauge was used to measure the thermal radiation of various types of flames with fuel, air and pure oxygen. And the Laser Induced Incandescence (LII) technique was applied to characterize the soot concentrations which mainly contribute to the continuum radiation from flame. The results show that an oxygen-enhanced inverse diffusion flame is very effective in increasing the thermal radiation compared to normal oxygen diffusion flame. This seems to be caused by overlapped heat release rate of double flame sheets formed in inverse flame and generation of higher intermediate soot in fuel rich zone of oxygen-fuel interface, which is desirable to increase continuum radiation. And the oxygen/methane reaction at slight fuel rich condition (Φ=2) in oxygen-enhanced inverse flame was found to be more effective to generate the soot with moderate oxygen availability.<br/>
Combustion and Radiation Characteristics of Oxygen-Enhanced Inverse Diffusion Flame
Hwang, Sang-Soon,Gore, Jay-P The Korean Society of Mechanical Engineers 2002 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.16 No.9
The characteristics of combustion and radiation heat transfer of an oxygen-enhanced diffusion flame was experimentally analyzed. An infrared radiation heat flux gauge was used to measure the thermal radiation of various types of flames with fuel, air and pure oxygen. And the Laser Induced Incandescence (LII) technique was applied to characterize the soot concentrations which mainly contribute to the continuum radiation from flame. The results show that an oxygen-enhanced inverse diffusion flame is very effective in increasing the thermal radiation compared to normal oxygen diffusion flame. This seems to be caused by overlapped heat release rate of double flame sheets formed in inverse flame and generation of higher intermediate soot in fuel rich zone of oxygen-fuel interface, which is desirable to increase continuum radiation. And the oxygen/methane reaction at slight fuel rich condition (ø=2) in oxygen-enhanced inverse flame was found to be more effective to generate the soot with moderate oxygen availability.
다공판에 의한 난류 특성이 예혼합 화염에 미치는 영향에 관한 연구
김주평(Jupyoung Kim),Aman Satija,Robert P. Lucht,Jay P. Gore 한국연소학회 2020 KOSCOSYMPOSIUM논문집 Vol.2020 No.9
An experimental study of the effects of two different turbulence characteristics generated by a perforated plate on the flame structure is conducted by using premixed flames. Stereoscopic particle image velocimetry (stereo PIV) and OH planar laser-induced fluorescence (OH PLIF) were used to study the effects. A plate with 62% blockage ratio was used to establish the stream-dominated flow regime and another with 86% blockage ratio was used to establish the vortex-dominated flow regime.