IDENTIFICATION OF EXHAUST SPECIES FROM THE COMBUSTION OF LM AND LMH FUELS.
Quarterly rept. no. 3, 1 Mar-31 May 67,
DENVER RESEARCH INST CO
Pagination or Media Count:
Chemical and real time spectrographic methods of analysis have been developed and used to provide information concerning the equilibrium relationships among chemical species formed in fuel-rich, boron containing propellant combinations. An analysis of the chemical composition of condensed phase reaction products obtained from an air-augmented, fuel-rich pentaborane-oxygen burner indicates that these products are not simple compounds of boron oxide B2O3 and boron nitride BN. The analytical techniques used include X-ray crystallographic analysis, infrared absorption, and scanning calorimetric analysis in addition to standard wet chemical methods. It is concluded that a significant fraction of the reaction products is composed of one or more metastable intermediate chemical species and is probably a complex mixture of boron suboxides and hydrated boron oxides. Real time spectrographic techniques were further developed and used to catalogue chemically specific emission spectra for selected propellant systems having molecular compositions containing atoms of C-H-O, B-H-O, and B-C-H-O. Spectrographic records were made of rocket exhaust plumes using a small research rocket operated at 100 psia chamber exhausted to ambient 12.3 psia. Propellant systems used for this study included kerosene-oxygen, pentaborane-oxygen and pentaborane-kerosene-oxygen, respectively. Author
- Combustion and Ignition