Document Type
Thesis
Date of Award
1-31-1985
Degree Name
Master of Science in Mechanical Engineering - (M.S.)
Department
Mechanical Engineering
First Advisor
John Vincent Droughton
Second Advisor
Pai-Lien Lu
Third Advisor
Richard C. Progelhof
Fourth Advisor
Hans E. Pawel
Abstract
The combustion processes and products of a single grain of burning black powder were experimentally investigated via the stroboscopic laser schlieren photographic technique. A high power modulated argon laser system was used in conjunction with a streak camera to provide a dynamic sequence of time resolved, high resolution schlieren photographs of a burning black powder grain. When black powder burns, a multi-phase product is produced consisting of hot gases, solid particles, and a molten liquid spray. The expansion processes of this multi-phase product cloud were recorded and characterized. Molten drops, reactive and nonreactive particles within as well as outside of the product clouds were observed and identified. The velocity history of the expanding product cloud and the flying particles was measured. Product cloud front expansion velocities ranged from 20 to 345 cm/sec. The average horizontal cloud front expansion rate was 80 cm/sec. Particle velocities ranged from 70 to 600 cm/sec. The particle size-history of reactive particles was also investigated. All tests were performed in air at atmospheric pressure.
Recommended Citation
Rowland, Donald Bruce, "A diagnostic study of burning black powder via stroboscopic laser schlieren photography" (1985). Theses. 3467.
https://digitalcommons.njit.edu/theses/3467
