Dual-pump coherent anti-Stokes Raman scattering thermometry in a sooting turbulent pool fire

Kearney, Sean P.; Frederickson, Kraig; Grasser, Thomas W.

doi:10.1016/j.proci.2008.06.148

Cited by 51 publications

(29 citation statements)

References 17 publications

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“…Comparisons are made to data that are described in [1][2][3]. These tests were performed at the FLAME facility at Sandia National Laboratories in Albuquerque, NM.…”

Section: Methodsmentioning

confidence: 99%

“…These tests were performed with methanol fuel to reduce soot formation for the optical diagnostics, and are documented in [1][2][3]. The tests were performed in the new Fire Laboratory for the Accreditation of Models and Experiments (FLAME) facility at Sandia National Laboratories, which was designed with strict control of boundary conditions for collecting validation-quality data.…”

Section: Introductionmentioning

confidence: 99%

“…The tests were performed in the new Fire Laboratory for the Accreditation of Models and Experiments (FLAME) facility at Sandia National Laboratories, which was designed with strict control of boundary conditions for collecting validation-quality data. Besides the well characterized boundary conditions, new diagnostics have been fielded, which include detailed data on the heat transfer to an object in the fire and Coherent Anti-Stokes Raman Spectroscopy (CARS) for highresolution temperature and species [2]. The CARS technique has sufficient spatial and temporal resolution (order of 1 cm and 10 ns) to validate the time resolved calculations that can be performed with a Large Eddy Simulation (LES) or similar type of CFD code.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fire Model Validation for Gas Temperatures and Radiative/Convective Partitioned Heat Flux

Brown¹,

Dowding²,

Nicolette³

et al. 2008

Fire Saf. Sci.

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A recent series of fire experiments has provided previously unavailable high-fidelity data for heat fluxes and gas temperature in a large-scale fire. These include histograms of temporally-resolved gas temperature measurements, which are helpful in assessing the time accuracy of a transient code. A convergence analysis has been performed to determine the appropriate code requirements for comparing with these new data. The convergence analysis suggests a significant benefit to employing higher resolution than was readily possible for these comparisons. Comparisons are made to the data for measured values including partitioned convective/radiative heat flux, and gas phase temperatures. Uncertainty analyses show that the uncertainties due to grid refinement are on the order of those from model input parameter uncertainties. The gas phase temperature results suggest the need for increased mesh resolution to resolve the temperature distributions.

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“…Comparisons are made to data that are described in [1][2][3]. These tests were performed at the FLAME facility at Sandia National Laboratories in Albuquerque, NM.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fire Model Validation for Gas Temperatures and Radiative/Convective Partitioned Heat Flux

Brown¹,

Dowding²,

Nicolette³

et al. 2008

Fire Saf. Sci.

View full text Add to dashboard Cite

show abstract

“…130,131 Over the past 15 years, CARS has been established as a versatile tool for sooting combustion environments. [132][133][134][135] For example, Aldén and Wallin 136 applied CARS to an industrial coal furnace. Braeuer et al 137 performed temperature and oxygen concentration measurements in an automotive auxiliary heating combustor operated with dodecane and diesel fuels.…”

Section: Coherent Anti-stokes Raman Scatteringmentioning

confidence: 99%

“…Kearney et al used CARS for temperature measurements in a pool fire. 133 The flame of a spray pyrolysis reactor for the generation of nanoparticles is another challenging environment, where CARS thermometry could be accomplished in the presence of droplets and particles. 138 Besides the presence of soot, highly turbulent environments such as those in most aerospace applications pose a challenge to optical diagnostics.…”

Section: Coherent Anti-stokes Raman Scatteringmentioning

confidence: 99%

Advanced Laser-Based Techniques for Gas-Phase Diagnostics in Combustion and Aerospace Engineering

Ehn

Zhu

et al. 2017

Appl Spectrosc

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Gaining information of species, temperature, and velocity distributions in turbulent combustion and high-speed reactive flows is challenging, particularly for conducting measurements without influencing the experimental object itself. The use of optical and spectroscopic techniques, and in particular laser-based diagnostics, has shown outstanding abilities for performing non-intrusive in situ diagnostics. The development of instrumentation, such as robust lasers with high pulse energy, ultra-short pulse duration, and high repetition rate along with digitized cameras exhibiting high sensitivity, large dynamic range, and frame rates on the order of MHz, has opened up for temporally and spatially resolved volumetric measurements of extreme dynamics and complexities. The aim of this article is to present selected important laser-based techniques for gas-phase diagnostics focusing on their applications in combustion and aerospace engineering. Applicable laser-based techniques for investigations of turbulent flows and combustion such as planar laser-induced fluorescence, Raman and Rayleigh scattering, coherent anti-Stokes Raman scattering, laser-induced grating scattering, particle image velocimetry, laser Doppler anemometry, and tomographic imaging are reviewed and described with some background physics. In addition, demands on instrumentation are further discussed to give insight in the possibilities that are offered by laser flow diagnostics.

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High dynamic range thermometry at 5 kHz in hydrogen–air diffusion flame using chirped‐probe‐pulse femtosecond coherent anti‐stokes Raman scattering

Dennis

Satija

Lucht

2015

J Raman Spectroscopy

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Chirped probe pulse femtosecond coherent anti-Stokes Raman scattering (CPP fs-CARS) thermometry was performed at 5 kHz in a hydrogen jet diffusion flame with an air co-flow. Measurements were performed at different heights and radial locations within the jet diffusion flame, up to 16 nozzle exit diameters downstream (x/d = 16). The near-nozzle measurements were characterized by large, organized, buoyancy-driven instabilities that become more chaotic at the downstream locations x/d ≥ 4. The diffusion flame results highlight temperature fluctuations characteristic of the buoyancy-driven Kelvin-Helmholtz-type instability and provide new insights into the transient structure of these flames. At some measurement locations, the time-varying temperatures ranged from 300 K to nearly 2400 K. The CPP fs-CARS signal intensity is a factor of approximately 1000 times lower at 2400 K compared with 300 K. A dual-channel detection system was used to increase the dynamic range of the CARS measurements. The determination of temperature from the single shot spectra is discussed in detail. Laser and detection system parameters were determined from CPP fs-CARS spectra obtained from a near-adiabatic laminar calibration flame apparatus. The temperature precision of the system was determined from these calibration measurements and was found to be better than 2.0% at 2200 K. The influence of an instrument response function on spectral fitting parameters is systematically assessed. Published 2015.

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Dual-pump coherent anti-Stokes Raman scattering thermometry in a sooting turbulent pool fire

Cited by 51 publications

References 17 publications

Fire Model Validation for Gas Temperatures and Radiative/Convective Partitioned Heat Flux

Fire Model Validation for Gas Temperatures and Radiative/Convective Partitioned Heat Flux

Advanced Laser-Based Techniques for Gas-Phase Diagnostics in Combustion and Aerospace Engineering

High dynamic range thermometry at 5 kHz in hydrogen–air diffusion flame using chirped‐probe‐pulse femtosecond coherent anti‐stokes Raman scattering

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