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Monitoring Temperature in High Enthalpy Arc-heated Plasma Flows using Tunable Diode Laser Absorption Spectroscopy.
| 题名： | Monitoring Temperature in High Enthalpy Arc-heated Plasma Flows using Tunable Diode Laser Absorption Spectroscopy. |
| 作者： | Chang, L. S.; Driver, D. M.; Hanson, R. K.; Jeffries, J. B.; Martin, M. N.; Nawaz, A.; Raiche, G.; Taunk, J. S. |
| 关键词： | Air Flow; Arc Heating; Diodes; Heating Equipment; Laser Cavities; Laser Spectroscopy; Magnetohydrodynamic Flow; Oxygen Atoms; Temperature Measurement; Time Temperature Parameter; Tunable Lasers |
| 摘要： | A tunable diode laser sensor was designed for in situ monitoring of temperature in the arc heater of the NASA Ames IHF arcjet facility (60 MW). An external cavity diode laser was used to generate light at 777.2 nm and laser absorption used to monitor the population of electronically excited oxygen atoms in an air plasma flow. Under the assumption of thermochemical equilibrium, time-resolved temperature measurements were obtained on four lines-of-sight, which enabled evaluation of the temperature uniformity in the plasma column for different arcjet operating conditions. |
| 报告类型： | 科技报告 |
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