Chirped probe pulse femtosecond coherent anti-Stokes Raman scattering thermometry at 5 kHz in a Gas Turbine Model Combustor
| Autor: | Carson D. Slabaugh, Robert P. Lucht, Claresta N. Dennis, Isaac Boxx, Wolfgang Meier |
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| Rok vydání: | 2015 |
| Předmět: |
gas turbine
fs CARS Chemistry business.industry Dynamic range Mechanical Engineering General Chemical Engineering Flame structure Spectral density Temperature measurement Spectral line kHz symbols.namesake Optics Femtosecond Chemical Engineering(all) Combustor symbols Physical and Theoretical Chemistry Verbrennungsdiagnostik business Raman scattering |
| Zdroj: | Proceedings of the Combustion Institute. 35:3731-3738 |
| ISSN: | 1540-7489 |
| DOI: | 10.1016/j.proci.2014.06.063 |
| Popis: | Single-laser-shot temperature measurements at 5 kHz were performed in a model gas turbine combustor using femtosecond (fs) coherent anti-Stokes Raman scattering (CARS). The combustor was operated at a global equivalence ratio of 0.65 and 10 kW thermal power. Measurements were performed at various locations within the flame in order to resolve the spatial flame structure and compare to previously published studies. Power spectral density analysis of the temperature measurements yielded the characteristic thermo-acoustic pulsation frequency previously reported at 308 Hz. These results demonstrate the usefulness of fs-CARS for the investigation of highly turbulent combustion phenomena. The spatial resolution of the single-laser shot temperature measurements was approximately 600 μm, the precision was approximately ±2%, and the estimated accuracy was approximately ±3%. The dynamic range was sufficient for temperature measurements ranging from 300 K to 2400 K, although some detector saturation was observed for low temperature spectra. |
| Databáze: | OpenAIRE |
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