COLOR TEMPERATURE AND SPECTRAL PROFILE OF SOME PROPELLANT GRAINS
Abstract
Spectroscopic observations were made on NRL propellant grains ignited in an evacuated environmental chamber. The purpose of these observations was to determine a color temperature and spectral profile of the propellant plumes. Spectrograms were obtained, using a static Hilger Medium Glass Spectrograph and an NRL time-resolved streak spectrograph, from stationary and oscillating propellant plumes. A time-resolved color temperature of 1690 K was determined from a very small area (5/64-in. diam.) of the stationary plume. The time- integrated color temperature in the spectral interval 4000 to 5000A, for the complete steady burning time of the propellant, was recorded by the static spectrograph as 2700 K. The area of the plume used to determine the latter color temperature was more than fifteen times that of the former. The profile of the plume spectrum from 3700 to 9000A exhibited a continuum upon which is superimposed, the atomic emission of aluminum and sodium and the molecular emission system of aluminum oxide. No zones or windows of continuous absorption were found in the continuum for the specified wave-length interval.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 05, 1964
- Accession Number
- AD0348828
Entities
People
- F. D. Harrington
- G. L. Knestrick
Organizations
- United States Naval Research Laboratory