flame
Moderators: AmyCowen, kgudger, bfinio, MadelineB, Moderators
As staryl13 said, I'm not quite sure exactly what you are testing, but maybe this will help:
http://gltrs.grc.nasa.gov/reports/2006/ ... 214057.pdf
"It is well known that solid flames do not always propagate in a uniform fashion. Rather, instabilities can develop along the flame front. Several different types of instabilities have been observed. Pulsating planar instabilities occur when there is no transverse structure to the flame front, but the front speed and temperature pulsate in a periodic or quasiperiodic fashion. Since the actual product produced depends on the temperature of the combustion wave, such instabilities are manifested by striations of different products in the sample. Two-dimensional instabilities have also been observed and analyzed when it is assumed that combustion only occurs on the surface of the sample. Such instabilities are generally associated with the formation of hot spots which exhibit various dynamics on the surface, e.g., propagating in a helical fashion along and around the sample. Again, they can lead to nonuniformities in the synthesized product and in fact some materials can only be synthesized by the hot temperatures associated with the spots." [http://www.esam.northwestern.edu/~bayliss/research.html]
I realize that the information is very complicated and hard to understand, but there are some valuable pieces of information in there that should help you out. Good luck!
-Susan
http://gltrs.grc.nasa.gov/reports/2006/ ... 214057.pdf
"It is well known that solid flames do not always propagate in a uniform fashion. Rather, instabilities can develop along the flame front. Several different types of instabilities have been observed. Pulsating planar instabilities occur when there is no transverse structure to the flame front, but the front speed and temperature pulsate in a periodic or quasiperiodic fashion. Since the actual product produced depends on the temperature of the combustion wave, such instabilities are manifested by striations of different products in the sample. Two-dimensional instabilities have also been observed and analyzed when it is assumed that combustion only occurs on the surface of the sample. Such instabilities are generally associated with the formation of hot spots which exhibit various dynamics on the surface, e.g., propagating in a helical fashion along and around the sample. Again, they can lead to nonuniformities in the synthesized product and in fact some materials can only be synthesized by the hot temperatures associated with the spots." [http://www.esam.northwestern.edu/~bayliss/research.html]
I realize that the information is very complicated and hard to understand, but there are some valuable pieces of information in there that should help you out. Good luck!
-Susan