Photoexcitation and photoionization of argon ahead of a strong shock wave
- Creators
- Dobbins, Richard A.
Abstract
A chemical kinetic model describing photochemical reactions that are likely to be important in "cold" argon ahead of a strong shock wave is examined on a quantitative basis. The model includes the propagation of resonance radiation far from the shock front in the wings of the resonance absorption line, partial trapping of the absorbed resonance radiation, subsequent photoionization of excited atoms, photoionization of ground state argon, and certain recombination and deexcitation processes. Specific consideration is given to shock tube geometry, the occurrence of both nonequilibrium and equilibrium regions of variable lengths behind the pressure discontinuity, and the (experimentally) known shock tube wall reflectivity. Theoretical predictions of electron and excited atom concentrations ahead of the shock wave are presented for typical shock tube operating conditions.
Additional Information
© 1968, American Institute of Aeronautics and Astronautics. Work supported by the Air Force Office of Scientific Research (OAR) under Contract AF49(638)-1285. The author is deeply indebted to Dr. Dieter Schlüter for the information generously conveyed on photoionization cross sections prior to its publication. The advice and encouragement of the staff of the Guggenheim Jet Propulsion Center, with whom the author was privileged to spend his sabbatical leave, is also acknowledged.Attached Files
Published - 190_Dobbins_RA_1968.pdf
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Additional details
- Eprint ID
- 21508
- Resolver ID
- CaltechAUTHORS:20101223-071151029
- Air Force Office of Scientific Research
- AF 49 (638)-1285
- Created
-
2011-01-12Created from EPrint's datestamp field
- Updated
-
2019-10-03Created from EPrint's last_modified field
- Caltech groups
- Guggenheim Jet Propulsion Center
- Series Name
- AIAA Papers
- Series Volume or Issue Number
- AIAA 68-666
- Other Numbering System Name
- AIAA
- Other Numbering System Identifier
- 68-666