On Some Physical Properties of Flames. Part II. The Static and Oscillatory Solutions of the Flame Equations.
Technical rept. 1 Jul 69-30 Jun 70,
NAVAL ORDNANCE STATION INDIAN HEAD MD
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The analysis of the static solutions shows that the determination of the concentration of negative ions in a flame can be used as a method for checking if a flame has reached the static configuration. This follows from the fact that the concentration of negative ions must be zero for a flame in static state, which means that the only process occurring in a static-state flame is that process which is present in a condition of thermal equilibrium and which is described by Sahas equation. Therefore, any deviation from Sahas equation corresponds to a nonstatic configuration or to the presence of another microprocess not included in the six processes assumed in the present theory. The discussion of the oscillatory solution permits the enunciation of the necessary and sufficient condition for a flame to exhibit an oscillatory configuration and the determination of the frequency of oscillation for each flame species at any point of the flame. The oscillatory solution suggests that a flame can be regarded as a gas of harmonic oscillators. The electrons are the only components to be considered which interact with an electromagnetic field as a gas of harmonic oscillators. A theoretical upper limit for the eigen-frequencies in flames has been given a numerical evaluation of those frequencies is in progress. Author
- Combustion and Ignition