Accession Number : AD0637512

Title :   PROCESSES OCCURRING IN PYROTECHNIC FLAMES.

Descriptive Note : Final rept. Aug 64-Feb 66.

Corporate Author : DENVER RESEARCH INST COLO

Personal Author(s) : Blunt,Robert M.

Report Date : APR 1966

Pagination or Media Count : 102

Abstract : The research was to acquire information that could be used to improve the luminosity and color of illuminating and signalling pyrotechnic compositions used in flare production. The following observations and conclusions were made: (1) A sharp degradation of luminosity occurs at low ambient pressures. (2) The excitation purity (color) was observed to increase as the pressure decreased. (3) The time required to burn a 10 gram mass was found to increase as the ambient pressure decreased. (4) The temperature measurements are in agreement with the luminosity findings, i.e., temperature decreases with decreasing pressure. (5) A test confirmed the hypothesis that the BaOH molecule is the source of the green color in Ba-containing flares. (6) The changes in luminosity and burning rate were explained by an hypothesis relating reaction rate to pressure of ambient atmosphere. (7) The observed burning rates and luminosity were expressed in mathematical form which may be helpful in future design studies. (8) A photographic atlas of spectra of flares containing barium and sodium was assembled covering the 3,700A to 7,400A region.

Descriptors :   (*PYROTECHNICS, *FLAMES), (*FLARES, FLAMES), COLORS, ILLUMINATION, PRESSURE, EXCITATION, BURNING RATE, TEMPERATURE, BARIUM COMPOUNDS, HYDROXIDES, EQUATIONS, ULTRAVIOLET SPECTRA, VISIBLE SPECTRA

Subject Categories : Pyrotechnics
      Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE