CARS temperature estimates from the muzzle blast flow field
A study is presented where CO CARS spectra were obtained from the muzzle blast flow field of a modified M-14 rifle for times and locations corresponding to the intermediate flash. Data are presented demonstrating the feasibility of our technique when applied to the extremely hostile environment being studied. These data include light transmission through the flow field at a location of 12.5 cm downstream of the muzzle and for times between 0.0 and 2.0 milliseconds. Analysis of the CO CARS spectra, also recorded at the 12.5 cm location, yield temperature estimates of approximately 1300 K for times between 0.78 and 0.91 milliseconds. Comparison with previous temperature measurements of the intermediate flash based on sodium and potassium line reversal show that these earlier results were too high and were a consequence of a nonequilibrium condition existing for the alkali metal atoms in the flow.
- Research Organization:
- Oregon State Univ., Corvallis, OR
- OSTI ID:
- 6163297
- Report Number(s):
- CONF-8610180-
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400102 -- Chemical & Spectral Procedures
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALKALI METALS
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
DATA ANALYSIS
ELEMENTS
EXPLOSIONS
FLAMES
GUNS
JETS
KINETICS
LASER SPECTROSCOPY
LIGHT TRANSMISSION
METALS
POTASSIUM
RAMAN SPECTROSCOPY
REACTION KINETICS
SODIUM
SPECTROSCOPY
TEMPERATURE MEASUREMENT
TIME DEPENDENCE
VERY HIGH TEMPERATURE