Laser-based measurements of pressure broadening and pressure shift coefficients of combustion-relevant absorption lines in the near-infrared region
| Autor: | Sebastian Bürkle, Nicole Walter, Steven Wagner |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Quantum optics
Materials science 010504 meteorology & atmospheric sciences Physics and Astronomy (miscellaneous) Spectrometer Absorption spectroscopy Near-infrared spectroscopy General Engineering General Physics and Astronomy Laser Combustion 01 natural sciences law.invention 010309 optics Pressure range law 0103 physical sciences Atomic physics Absorption (electromagnetic radiation) 0105 earth and related environmental sciences |
| Zdroj: | Applied Physics B. 124 |
| ISSN: | 1432-0649 0946-2171 |
| DOI: | 10.1007/s00340-018-6993-y |
| Popis: | A set of high-resolution absorption spectrometers based on TDLAS was used to determine the impact of combustion-relevant gases on the pressure shift and broadening of H2O, CO2, C2H2 and CH4 absorption lines in the near-infrared spectral region. In particular, self- and foreign-broadening coefficients induced by CO2, N2, O2, air, C2H2 and CH4 were measured. The absorption lines under investigation are suitable to measure the respective species in typical combustion environments via laser absorption spectroscopy. Additionally, species-dependent self- and foreign-induced pressure shift coefficients were measured and compared to the literature. The experiments were performed in two specifically designed absorption cells over a wide pressure range from 5 to 180 kPa. Different sources of uncertainty were identified and quantified to achieve relative measurement uncertainties of 0.7–1.5% for broadening coefficients and 0.6–1.6% for pressure shift coefficients. |
| Databáze: | OpenAIRE |
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