Accession Number:

ADA073556

Title:

Particle Size Measurements in Solid Propellant Rocket Exhaust Plumes

Descriptive Note:

Final rept. 11 Jul 1977-30 Jun 1978

Corporate Author:

TENNESSEE UNIV SPACE INST TULLAHOMA

Report Date:

1978-06-30

Pagination or Media Count:

47.0

Abstract:

Particle sizing interferometer measurement of particle size distributions, velocity and number density in samples of rocket propellant exhaust is described. Signal visibility and scattered intensity for individual particles was measured for a nominal size range of 0.3 to 6 micrometers. Calibration tests of the instrument were obtained by firing small propellant samples into a 20-cu cm chamber and comparing the measured particle size distributions with those obtained from estimates using multiple wavelength transmissometers and a commercial optical particle counter. Particle sizing interferometer estimates of particle size distributions and number densities required the development of models which could account for sample space dependence on particle size and illuminating fringe contrast variation. Results obtained by using these models on particle size data from calibration and rocket motor test firings show the need for well-controlled insitu perturbationless particle size measuring techniques for hostile environments.

Subject Categories:

  • Solid Rocket Propellants

Distribution Statement:

APPROVED FOR PUBLIC RELEASE