Laser diagnostics of atomic oxygen in arc-heater plumes
説明
Laser absorption spectroscopy has been conducted to measure chemical compositions of high enthalpy flows generated by constrictor type arc-heaters. Distributions of metastable atomic oxygen and argon number density and translational temperature were obtained from absorption profiles at 777.19nm and 840.82nm. As a result, it was found that the density peak of atomic oxygen has a peak off-axis in the vicinity of the nozzle exit, and the peak moves toward the centerline in the downstream. Therefore, oxygen injected at the constrictor is not thought to be enough mixed with argon in the nozzle and then diffuse from outside toward the centerline, being dissociated in the plume out of the nozzle. Translational temperature deduced from OI 777.19nm absorption line was higher than that from Arl 840.82nm.
収録刊行物
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- 40th AIAA Aerospace Sciences Meeting & Exhibit
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40th AIAA Aerospace Sciences Meeting & Exhibit 2002-01-14
American Institute of Aeronautics and Astronautics (AIAA)