Cars Spectroscopy of Propellant Flames
ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER DOVER NJ LARGE CALIBER WEAPONSYSTEMS LAB
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Broadband coherent anti-stokes Raman scattering CARS spectra were obtained from both the reaction zone and postflame regions of CH4N2O flames. The temperature and concentration profiles obtained from both N2 and N2O flames were used to understand the elementary processes occurring in CH2 N2 flames. In addition, N2 and CO vibrational spectra were used to obtain concentration and temperature profiles by a least-square fit to model calculations. The results obtained were in accord with thermochemical calculations. In rich CH4N2O flame previously unobserved, CARS spectra were obtained from pure rotational H2 transitions. These H2 spectra offer further opportunities for studying propellant systems. The characterization of CARS spectroscopy obtained from these studies was used to obtain initial CARS measurements from the reaction zone of nitramine composite propellant flames. These studies are only possible using a coherent, highly spatially, and temporally resolved spectroscopy such as CARS. These qualities of CARS which have been applied to the deflagration of propellants containing the explosive ingredients nitrocellulose andor RDX can be used to study the decomposition and explosive reactions of other energetic materials in both the gas and solid phases.
- Atomic and Molecular Physics and Spectroscopy
- Combustion and Ignition
- Solid Rocket Propellants