Accession Number : AD0818106

Title :   IDENTIFICATION OF EXHAUST SPECIES FROM THE COMBUSTION OF LM AND LMH FUELS.

Descriptive Note : Quarterly rept. no. 3, 1 Mar-31 May 67,

Corporate Author : DENVER RESEARCH INST CO

Personal Author(s) : McLain, William H. ; Knight, R. Edward ; Williams, Ralph E.

Report Date : JUL 1967

Pagination or Media Count : 58

Abstract : 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)

Descriptors :   *SPECTROSCOPY), *FUELS), (*COMBUSTION PRODUCTS, (*CHEMICAL EQUILIBRIUM, (*BORON, FUELS), EXHAUST GASES, BORON COMPOUNDS, OXIDES, NITRIDES, REAL TIME, KEROSENE, OXYGEN, PENTABORANES, X RAY DIFFRACTION, INFRARED SPECTROSCOPY, MASS SPECTROSCOPY, CALORIMETRY.

Subject Categories : Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE