Ultraviolet-Visible Spectrometry Characterization of Combustion in Hybrid Rocket Motors
Edmond W. Wilson, Jr., Brett D. Keller, Kellen M. Harkness,Christopher S. Smeal, Megan S. Easterly and James E. Mackey, Department of Physical Science, Harding University
Small, portable ultraviolet and visible spectrometers can be used to characterize the combustion and regression rates of hybrid rocket and other combustion emission plumes. In this study, two spectrometers, operating in the ultraviolet and visible ranges, were used to measure the hydroxyl radical emission spectrum and the broadband visible emission spectrum of hybrid rocket motors under a variety of oxidizer to fuel ratios. Time and spatial profiles were measured along with regression rates. Correlations were drawn between broadband emission spectra and regression rates.
