期刊
COMBUSTION AND FLAME
卷 230, 期 -, 页码 -出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.combustflame.2021.111455
关键词
Forced acoustics; Acoustic energy; Diffusion flame; Soot suppression; Force analysis
类别
资金
- National Natural Science Foundation of China [51776188, 21805244]
- Zhejiang Provincial Natural Science Foundation of China [LQ21E060003, LQ21E060001, LZ21E060001]
The effect of acoustic energy on soot suppression in an acetylene-air diffusion flame was experimentally studied, showing a linear increase in suppression efficiency with increasing acoustic energy. Different acoustic waveforms resulted in similar acoustic energy levels for achieving the same soot suppression effect. Acoustic waves caused periodic stretching and compressing of the flame, with a fluctuation velocity above 2 m/s leading to 50% suppression efficiency, but increasing premixed levels reduced flame height and fluctuation velocity.
The effect of the energy of forced acoustics on the soot suppression from an acetylene-air diffusion flame is experimentally investigated. The acoustic energy is calculated by integrating the acoustic power in the positive period. Results show that the suppression efficiency of soot increases linearly with the increase of acoustic energy. In addition, the acoustic energy is similar under different acoustic waveforms when achieving the same soot suppression effect. The acoustic waves cause the flame to periodically stretch and compress, and the flame brush shows the range of fluctuations in the flame front. When the fluctuation velocity is greater than 2 m/s, the suppression efficiency reaches 50%. However, as the premixed level increases, the flame height decreases, resulting in a decrease of fluctuation velocity. (c) 2021 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
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