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

Subject Categories:

  • Combustion and Ignition
  • Solid Rocket Propellants

Distribution Statement:

APPROVED FOR PUBLIC RELEASE