A Mathematical Model of Flare Plume Combustion and Radiation
Abstract
A mathematical model of combustion and radiation in the plume of a pyrotechnic flare was constructed based on observations and on relevant radiation and thermodynamic theory. The model is applied to specific cases by means of computer program which computes the equilibrium thermodynamic properties and the radiation rates at closely spaced points from the flare surface, where combustion begins, to the tail of the plume where radiation is essentially zero. The calculations indicate that in real flares a significant amount of air augments combustion and that this air has a large effect on flame temperature and on luminous output. The smoke is found to emit as a weak graybody. Burning times for the magnesium particles are indicated. When appropriate theoretical and experimental input data are supplied, the program should be useful for predicting output from new formulas giving radiation in a large number of wavelengths or wavelength bands. Specifically, the model should be useful for formulating colored flares and infrared flares. The computer program used is described.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1975
- Accession Number
- ADA015629
Entities
People
- John E. Tanner Jr.