Hydrodynamic effects in the flame spreading, ignitability and steady burning of liquid fuels

✍ Scribed by I. Glassman; J.G. Hansel; T. Eklund

• Publisher: Elsevier Science
• Year: 1969
• Tongue: English
• Weight: 239 KB
• Volume: 13
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(69)90037-6

✦ Synopsis

LL~rERS TO THE EDITORS 99 at T'o and T'~ (~R/t~P)T will be zero, and examination ofd2P/dT~ will in principle enable one to distinguish between these two points. However, in practice the expression obtained is rather complex. It is not suggested that these upper limits are thermal in nature, but it is simply interesting to note that ignition curves of this sort do not necessarily require a branching chain reaction. At the same time it is worth noting that low pressure lobes such as those observed with hydrocarbons, aldehydes etc. (Figure 2) can never be accounted for by a theory of this type since at the tip of the lobe it appears that dP/dTo = 0 (although a discontinuity in slope cannot be ruled out) and this would require an infmite value of (t~R/~P)T. In fact there are good reasons 2 to believe that dP/d T O is discontinuous at the points A and B in Figure 2, due to the fact that the critical condition along AB represents the disappearance of an oscillatory non-explosive state.