Temperature and CO2 concentration measurements in the exhaust stream of a liquid-fueled combustor using dual-pump coherent anti-Stokes Raman scattering (CARS) spectroscopy

Roy, Sukesh; Meyer, Terrence R.; Lucht, Robert P.; Belovich, Vincent; Corporan, Edwin; Gord, James R.

doi:10.1016/j.combustflame.2004.04.012

Cited by 75 publications

(19 citation statements)

References 22 publications

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“…[6] In highpressure, turbulent reacting flows where rapid spatiotemporal variations of pressure and temperature are present, maintaining the spatial overlap between the laser beams becomes extremely challenging, if not impossible. [8,10] The objective of the present study is to demonstrate the feasibility of performing CARS spectroscopy-based CO 2 concentration measurements using a single, shaped 7-fs (femtosecond) laser pulse.…”

Section: Introductionmentioning

confidence: 99%

“…[8,10] In singlebeam CARS spectroscopy, the bandwidth of the laser is chosen so that it exceeds the magnitude of the Raman shifts for the transitions of interest. The coherence induced by the pump and Stokes photons within the laser bandwidth is then probed by a portion of the same laser beam, as demonstrated by Oron et al [22] Several more recent demonstrations of single-beam CARS spectroscopy for measuring various species concentrations have been reported.…”

Section: Introductionmentioning

confidence: 99%

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Single‐beam coherent anti‐Stokes Raman scattering (CARS) spectroscopy of gas‐phase CO₂ via phase and polarization shaping of a broadband continuum

Roy¹,

Wrzesinski²,

Pestov³

et al. 2010

J Raman Spectroscopy

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Coherent anti-Stokes Raman scattering (CARS) spectroscopy of gas-phase CO 2 is demonstrated using a single femtosecond (fs) laser beam. A shaped ultrashort laser pulse with a transform-limited temporal width of ∼7 fs and spectral bandwidth of ∼225 nm (∼3500 cm −1 ) is employed for simultaneous excitation of the CO 2 Fermi dyads at ∼1285 and ∼1388 cm −1 . CARS signal intensities for the two Raman transitions and their ratio as a function of pressure are presented. The signal-to-noise ratio of the single beam-generated CO 2 CARS signal is sufficient to perform concentration measurements at a rate of 1 kHz. The implications of these experiments for measuring CO 2 concentrations and rapid pressure fluctuations in hypersonic and detonation-based chemically reacting flows are also discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Single‐beam coherent anti‐Stokes Raman scattering (CARS) spectroscopy of gas‐phase CO₂ via phase and polarization shaping of a broadband continuum

Roy¹,

Wrzesinski²,

Pestov³

et al. 2010

J Raman Spectroscopy

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“…For mixtures involving H 2 as active molecule, we have previously demonstrated that convenient polynomial laws for temperature dependency can be used [23,31] for collisional line broadening at a density of 1 amagat γ coll =γ T +γ 0 (5) and for collisional line shifting…”

Section: Spectral Line Shape Modelization Of H 2 -N 2 Mixturementioning

confidence: 99%

“…Coherent anti-Stokes Raman scattering (CARS) has been successfully employed for remote nonintrusive spatially precise measurements of temperature and major species' concentrations in IC-engines, [1 -3] jet engine exhausts, [4,5] or burners with small optical accesses. [6,7] The theory and application of CARS are well explained in the text book by Eckbreth.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of temperature and concentration in H₂N₂ dual‐pump CARS spectra using the Keilson and Storer three‐dimensional model for H₂ Q‐branch

Gao

Weikl

Seeger

et al. 2009

J Raman Spectroscopy

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Coherent anti-Stokes Raman scattering (CARS) is a widely accepted standard for thermometry in combustion environments.Accurate lineshape models are of crucial importance for the computation of CARS spectra used for temperature and concentration evaluations. Therefore, a new lineshape model for the H 2 molecule is developed and tested for ambient pressure applications. Measurements were taken in a heated cell and in a partially premixed flame with dual-pump CARS techniques, respectively. Line broadening coefficients for H 2 -N 2 mixture are calculated using the new speed memory effects model. The experimental vibrational-CARS (VCARS) spectra were evaluated with this new lineshape model and the temperature and relative H 2 concentration results were compared with an already existing model.

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“…These are conditions typically found in industrial coal furnaces and CARS has the demonstrated capability of probing coal combustion systems [16][17][18][19]. CARS has also been applied to a wide variety of engines, ranging from supersonic combustors to internal combustion engines for the purposes of thermometry and species concentration determinations [13,[20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Diagnostic development for determining the joint temperature/soot statistics in hydrocarbon-fueled pool fires : LDRD final report.

Casteneda¹,

Frederickson²,

Grasser³

et al. 2009

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A joint temperature/soot laser-based optical diagnostic was developed for the determination of the joint temperature/soot probability density function (PDF) for hydrocarbon-fueled meter-scale turbulent pool fires. This Laboratory Directed Research and Development (LDRD) effort was in support of the Advanced Simulation and Computing (ASC) program which seeks to produce computational models for the simulation of fire environments for risk assessment and analysis. The development of this laser-based optical diagnostic is motivated by the need for highly-resolved spatiotemporal information for which traditional diagnostic probes, such as thermocouples, are ill-suited. The in-flame gas temperature is determined from the shape of the nitrogen Coherent Anti-Stokes Raman Scattering (CARS) signature and the soot volume fraction is extracted from the intensity of the Laser-Induced Incandescence (LII) image of the CARS probed region. The current state of the diagnostic will be discussed including the uncertainty and physical limits of the measurements as well as the future applications of this probe.4

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Temperature and CO2 concentration measurements in the exhaust stream of a liquid-fueled combustor using dual-pump coherent anti-Stokes Raman scattering (CARS) spectroscopy

Cited by 75 publications

References 22 publications

Single‐beam coherent anti‐Stokes Raman scattering (CARS) spectroscopy of gas‐phase CO₂ via phase and polarization shaping of a broadband continuum

Single‐beam coherent anti‐Stokes Raman scattering (CARS) spectroscopy of gas‐phase CO₂ via phase and polarization shaping of a broadband continuum

Evaluation of temperature and concentration in H₂N₂ dual‐pump CARS spectra using the Keilson and Storer three‐dimensional model for H₂ Q‐branch

Diagnostic development for determining the joint temperature/soot statistics in hydrocarbon-fueled pool fires : LDRD final report.

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Temperature and CO2 concentration measurements in the exhaust stream of a liquid-fueled combustor using dual-pump coherent anti-Stokes Raman scattering (CARS) spectroscopy

Cited by 75 publications

References 22 publications

Single‐beam coherent anti‐Stokes Raman scattering (CARS) spectroscopy of gas‐phase CO2 via phase and polarization shaping of a broadband continuum

Single‐beam coherent anti‐Stokes Raman scattering (CARS) spectroscopy of gas‐phase CO2 via phase and polarization shaping of a broadband continuum

Evaluation of temperature and concentration in H2N2 dual‐pump CARS spectra using the Keilson and Storer three‐dimensional model for H2 Q‐branch

Diagnostic development for determining the joint temperature/soot statistics in hydrocarbon-fueled pool fires : LDRD final report.

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Single‐beam coherent anti‐Stokes Raman scattering (CARS) spectroscopy of gas‐phase CO₂ via phase and polarization shaping of a broadband continuum

Single‐beam coherent anti‐Stokes Raman scattering (CARS) spectroscopy of gas‐phase CO₂ via phase and polarization shaping of a broadband continuum

Evaluation of temperature and concentration in H₂N₂ dual‐pump CARS spectra using the Keilson and Storer three‐dimensional model for H₂ Q‐branch