하향 전파하는 예혼합 화염의 이차 열음향 불안정성에 미치는 화염면적 변화의 영향
Effects of Variation of Flame Surface Area on Secondary Acoustic Instability in Downward-Propagating Premixed Flames
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The effects of varying flame surface area due to hydrodynamic instability on secondary acoustic instability in downward propagating flames were studied experimentally. To quantitatively control hydrodynamic instability, one of intrinsic combustion instabilities, CO2 laser irradiation technique was adopted. Because of the increase in flame surface area of the flame surface area artificially, the transition from primary acoustic instability to secondary acoustics instability occurred, and the occurrence time of secondary acoustic field became relatively shorter when the rate of variation in flame surface area was increased. However, the rate of variation in flame surface area and the wave number of corrugated structure were found to have little effect on the growth mechanism of secondary acoustic instability.
Abstract
The effects of varying flame surface area due to hydrodynamic instability on secondary acoustic instability in downward propagating flames were studied experimentally. To quantitatively control hydrodynamic instability, one of intrinsic combustion instabilities, CO2 laser irradiation technique was adopted. Because of the increase in flame surface area of the flame surface area artificially, the transition from primary acoustic instability to secondary acoustics instability occurred, and the occurrence time of secondary acoustic field became relatively shorter when the rate of variation in flame surface area was increased. However, the rate of variation in flame surface area and the wave number of corrugated structure were found to have little effect on the growth mechanism of secondary acoustic instability.
참고문헌 (18)
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