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Boulder City, CO, United States

Sappey A.D.,ZoloTechnologies Inc. | Masterson P.,ZoloTechnologies Inc. | Howell J.,ZoloTechnologies Inc. | Estes M.,ZoloTechnologies Inc. | And 2 more authors.
Journal of Propulsion and Power | Year: 2014

The authors have demonstrated tunable diode laser spectroscopy measurements of temperature and water concentration with spatial resolution at the nozzle exit of an augmented gas turbine engine for the first time. Spatial resolution was achieved by performing tunable diode laser path-averaged measurements over 12 separate angles with the engine in ground idle and afterburner mode. Anomalies in the final time-averaged images indicate recurring plume structures, such as hot streaks and cold spots. Although temporal resolution was not demonstrated in this preliminary work, a system has been defined that should produce update rates up to 1 kHz, thereby enabling the study of augmenter combustion dynamics. Two-dimensional images of CO, CO2, and O 2 should also be measureable at slower update rates with good spatial resolution. The authors believe that such measurements have the potential to reduce the time required to diagnose engine malfunctions and assess the efficacy of engine maintenance, repair, and overhaul. © 2012 AIAA. Source

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