부분예혼합화염에서 연소실 압력 변동이 화염구조와 국소 반응강도에 미치는 영향 = Influence of changing combustor pressure on flame structure and local reaction intensity in the partially premixed flame

다국어 초록 (Multilingual Abstract)

The influence of combustor pressure on local reaction intensity for the partially premixed flames was investigated by measurements of local chemiluminescence intensity. Induced flow is often applied to the industrial boiler systems in order to improve heat transfer and prevent leakage. In order to investigate combustion characteristics in the induced flow pattern, the combustor pressure index(P<SUP>*</SUP>) was controlled in the range of 0.7~1.3 for each equivalence ratio in the present combustion system, where P<SUP>*</SUP> is defined as the ratio of absolute pressure to atmospheric one. Comparison between local reaction intensity and pressure index have been investigated by simultaneous CH<SUP>*</SUP>, C₂<SUP>*</SUP> and CH<SUP>*</SUP> intensity measurement. It could be observed that reaction zone became longer with decreasing P* from CH<SUP>*</SUP> chemiluminescence intensity of axial direction. The mean and rms value of C₂<SUP>*</SUP> and CH<SUP>*</SUP> chemiluminescence intensities, which indicated reaction intensity in the methane/air flames, decreased with decreasing pressure index for Φ≤1, while they increased with decreasing pressure index than atmosphere for Φ＞1. C₂/CH value, which has strong relationship with local equivalence ratio, was almost same for Φ≤1 regardless of pressure index change, while they showed large level for lower pressure index for Φ＞1 conditions. Low pressure than atmospheric condition lead active combustion reaction due to increased diffusion velocity of unburned fuel for rich conditions.

목차 (Table of Contents)

• ABSTRACT
• 1. 서론
• 2. 실험장치 및 방법
• 3. 실험 결과 및 고찰
• 4. 결론
• 후기
• 참고문헌