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지원사업
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커뮤니티
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초록·키워드
This work was experimentally conducted in impingement jet configuration with a premixed syngas-air mixture having the volume ratios of 10% and 90% for H₂ and CO, by varying Reynolds number(950 to 2550) and equivalence ratio(0.675 to 1.1). The study focused on clarifying the mechanisms on the oscillation generated in lifted noisy disc flame(noisy flame) and the instability driven by flame-vortex interaction mechanism. The results suggest that the flames were formed at fully developed flow beyond potential core region by confirming free jet propagation theory and measuring experimentally velocity profiles between nozzle and plate. These mean that the effect of the flow to the flame could be ignored. Also, the non-reacting flow field presented divergent flow shape, but the reacting flow field showed a “S” shape by high speed camera(1000 fps), video camera(960 fps). The FFT frequencies of flame and vortex were acquired by high speed camera images. The frequency was obtained by analyzing data which measured pressure fluctuation inside and outside of burner. The frequency of cold vortex(V<SUB>cd</SUB> = 140 ~ 180 Hz) was different to natural frequency of burner itself(60 Hz). The frequencies of vortex and pressure perturbation were similar to flame frequency. Thus, the cause of oscillation was not the flow but by flame and the flame-vortex interaction was associated with feedback mechanism as comparison of frequency, pressure perturbation and vortex.
본문·목차
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
최근 본 자료 전체보기
UCI(KEPA) : I410-ECN-0101-2018-431-003597542
