Accession Number : AD0811156

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

Descriptive Note : Quarterly rept. no. 2, 1 Dec 66-28 Feb 67,

Corporate Author : DENVER RESEARCH INST CO

Personal Author(s) : McLain, W. H. ; Knight, R. E. ; Evans, R. W.

Report Date : MAR 1967

Pagination or Media Count : 53

Abstract : This is the second report of a twelve-month research program being conducted to study the metastable chemical species produced in boron fueled rocket plumes. Experimental studies of boron-fueled, air-augmented propellant systems indicate that metastable species are formed in the condensate fraction of the propellant stream. X-ray and differential scanning calorimetric analyses of the condensate fraction indicate the presence of one or more metastable intermediates. X-ray analysis shows a clearly defined crystallographic species exists in addition to the expected boron oxide and boron nitride. Differential scanning calorimetric analysis of the condensates formed during combustion of boron fuels show a relatively complex exothermic behavior between 298 and 1000 C. This indicates the presence of one or more species that have been quenched in a metastable condition. The infrared spectra of the plume emission for pentaborane fueled studies show chemiluminescence in the 5.3 - 5.8 micron region of the infrared. Similar chemiluminescence was not observed in the infrared for boron slurries, possibly indicating a different reaction mechanism. (Author)

Descriptors :   *LIQUID ROCKET PROPELLANTS), (*EXHAUST GASES, (*HYDRIDES, METALS), PENTABORANES, X RAY DIFFRACTION, CALORIMETRY, OXIDES, NITRIDES, INFRARED SPECTRA, CHEMILUMINESCENCE, FUELS, EMISSIVITY, EXHAUST FLAMES, COMBUSTION, MASS SPECTROSCOPY, WETTING, DIFFERENTIAL THERMAL ANALYSIS, THRUST AUGMENTATION, SLURRY FUELS, CRYSTALLOGRAPHY.

Subject Categories : Liquid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE