Accession Number:
AD0744282
Title:
Combustion of Boron Particles: Experiment and Theory,
Descriptive Note:
Corporate Author:
PURDUE UNIV LAFAYETTE IND PROJECT SQUID HEADQUARTERS
Personal Author(s):
Report Date:
1962-05-01
Pagination or Media Count:
33.0
Abstract:
The primary purpose of the work was measurement of burning times of single boron particles as functions of three experimental variables particle diameter d from 37 to 124 micrometers, pressure P from 0.17 to 35.0 atm, and mole fraction of oxygen in gas X from 0.1 to 1.0. Limited studies were also made in fluorine-containing gases without oxygen. The experiments were done by a previously described laser-ignition technique. In oxygen-containing gases measurable pre-ignition delays were observed, except at low pressures they were not observed in the absence of oxygen. The effect of convection in these free-fall experiments was found to be significant at large values of d and P, and had to be taken into account in interpretation of the data. When d, P, and X are sufficiently high, the burning times are found to be inversely proportional to X, directly proportional to d squared, and independent of P. At low values of these parameters, burning times deviate from these scaling laws. Author
Descriptors:
Subject Categories:
- Combustion and Ignition
- Solid Rocket Propellants