Particle Size Measurements in Solid Propellant Rocket Exhaust Plumes
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1978
- Accession Number
- ADA073556
Entities
People
- Kenneth E. Harwell
- W. Michael Farmer
Organizations
- University of Tennessee Space Institute