SHORT COMMUNICATION Some Examples of Hysteresis Phenomena in Combustion
作者:
H. G. PEARLMAN,
S. H. SOHRAB,
期刊:
Combustion Science and Technology
(Taylor Available online 1991)
卷期:
Volume 76,
issue 4-6
页码: 311-319
ISSN:0010-2202
年代: 1991
DOI:10.1080/00102209108951715
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
In the present experimental study, some examples of hysteresis phenomena in combustion systems are described. In particular, the onset of acoustic instability of premixed flames in stagnation-point flow is investigated. It is found that for a given nozzle speed, transition from acoustic to non-acoustic burning regime is history dependent. The critical molar fuel concentrationsXFUandXFLcorresponding to the onset and termination of acoustic flames as a function of the mean exit velocity of the gas at the nozzle are determined which show the hysteresis band. In the study, additional example of such hysteresis effects in terms of the extinction and re-establishment of combustion of premixed flames in the stagnation-point flow is examined. Finally, the hysteresis effects associated with the onset and termination of rotation of polyhedral butane Bunsen flames as a function of the velocity of a co-flowing nitrogen stream is investigated. The possible significance of the results to the modeling of flamelet dynamics in turbulent combustion is discussed.
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