Dual-Pump Coherent Anti-Stokes Raman Scattering Temperature and CO Concentration Measurements
| Autor: | Campbell D. Carter, James R. Gord, Keith D. Grinstead, Paul M. Danehy, Viswanathan Velur-Natarajan, Gregory J. Fiechtner, Roger L. Farrow, Robert P. Lucht |
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| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | AIAA Journal. 41:679-686 |
| ISSN: | 1533-385X 0001-1452 |
| Popis: | Measurements of temperature and CO2 concentration using dual-pump coherent anti-Stokes Raman scattering, (CARS) are described. The measurements were performed in laboratory flames,in a room-temperature gas cell, and on an engine test stand at the U.S. Air Force Research Laboratory, Wright-Patterson Air Force Base. A modeless dye laser, a single-mode Nd:YAG laser, and an unintensified back-illuminated charge-coupled device digital camera were used for these measurements. The CARS measurements were performed on a single-laser-shot basis. The standard deviations of the temperatures and CO2 mole fractions determined from single-shot dual-pump CARS spectra in steady laminar propane/air flames were approximately 2 and 10% of the mean values of approximately 2000 K and 0.10, respectively. The precision and accuracy of single-shot temperature measurements obtained from the nitrogen part of the dual-pump CARS system were investigated in detail in near-adiabatic hydrogen/air/CO2 flames. The precision of the CARS temperature measurements was found to be comparable to the best results reported in the literature for conventional two-laser, single-pump CARS. The application of dual-pump CARS for single-shot measurements in a swirl-stabilized combustor fueled with JP-8 was also demonstrated. |
| Databáze: | OpenAIRE |
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