Raman Scattering Studies of Combustion

Lapp, M.; Hartley, D. L.

doi:10.1080/00102207608946735

Cited by 34 publications

(3 citation statements)

References 22 publications

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“…The numerous advantages of laser diagnostic techniques for combustion investigations are by now self-evident and have provided the motivation for the considerable effort invested in the development of a variety of laser-based measurement approaches (Lapp & Hartley 1976;Lederman 1977;Eckbreth etal. 1979;Eckbreth 1981;Crosley 1980;Bechtel & Chraplyvy 1982).…”

Section: Introductionmentioning

confidence: 99%

Considerations for the application of CARS to turbulent reacting flows

Eckbreth¹,

Stufflebeam²

1985

Experiments in Fluids

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Abstract. Coherent anti-Stokes Raman spectroscopy (CARS) has matured considerably over recent years and is experiencing widespread application in fundamental and practical combustion situations. Its utilization in turbulent reacting flows is far from routine, however, and several problem areas need to be addressed and refined. This paper reviews these problems and assesses the status of current and proposed solution approaches. Due to its highly nonlinear dependence on temperature and species concentration, CARS measurements in time-varying environments necessitate assembly of "instantaneous" single-pulse measurement histograms, even to extract time-averaged properties. A number of factors contribute to distortion of single pulse CARS spectra and, thus, measurement inaccuracy; various improvement strategies will be evaluated. The problem of absolute concentration measurements at low and high Mach numbers in refracting and attenuating media will be discussed. The paper concludes with a description of an approach to permit CARS measurements of several species simultaneously in a single laser pulse.

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Section: Introductionmentioning

confidence: 99%

Considerations for the application of CARS to turbulent reacting flows

Eckbreth¹,

Stufflebeam²

1985

Experiments in Fluids

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“…Linear Raman scattering was applied to the measurement of temperatures and densities in combustion flames shortly after the availability of the laser. 3 Apart from the pioneering paper by Drake and Rosenblatt, 4 who used the rotational Raman spectrum of N 2 to measure the temperature, most of the work in those early days employed the less accurate procedure of fitting the contour of vibrational bands 5 -8 because of the much longer times needed to record the rotational spectrum with photomultiplier tubes (PMT). Bechtel et al 9 carried out a thorough study of a special 'flat' premixed hydrocarbon/air flame; temperature and species profiles along the gas flow were determined by Raman scattering and laser-induced fluorescence, and compared successfully with combustion models.…”

Section: Introductionmentioning

confidence: 99%

Quantitative diagnostics of a methane/air mini‐flame by Raman spectroscopy

Fernández

Punge

Tejeda

et al. 2006

J Raman Spectroscopy

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We present a quantitative investigation by linear Raman spectroscopy of a methane/air premixed flame from a commercial burner. Rotational temperatures and absolute densities of the major species, N 2 , O 2 , CH 4 , CO 2 , and H 2 O have been measured in a grid of points across the flame section. Axial and radial profiles of temperature and densities are reported, and mass balances along the flame axis are discussed. We show the capabilities of this technique for combustion studies by using currently available standard detectors and spectrometers.

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“…Different techniques were developed based on Fiber Bragg gratings [3], differential luminescence measurement [4], emission intensity changes [5], and lifetime changes [6]. Intensity sensors are based on Raman scattering [7], fluorescence [8], and spectral transmission changes. Interferometric sensors were configured in several different ways [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Optical sensing techniques for temperature measurement

2013

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Temperature is an important parameter that needs accurate measurement. Theoretical descriptions of the fluorescence ratio method, fluorescence lifetime sensing, and interferometric methods for temperature measurement are given. Fluorescence lifetime sensing calibration plots have been developed for temperature measurement from 20°C to 600°C using Er(3+)-doped glass, and from 20°C to 90°C using Sm(3+)-doped CaF(2). Lifetime sensing results of Pr(3+)-doped YAG and Ho(3+)-doped fluoride crystals for temperature measurement are also summarized. Mach-Zehnder interferometer measurements revealed that the passage of a 300 mW laser beam of 915 nm changed the temperature of the Yb(3+)-doped YAG crystal by 7.1°C. The interferometer technique is useful for measuring absolute temperature changes in laser cooling studies.

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Raman Scattering Studies of Combustion

Cited by 34 publications

References 22 publications

Considerations for the application of CARS to turbulent reacting flows

Considerations for the application of CARS to turbulent reacting flows

Quantitative diagnostics of a methane/air mini‐flame by Raman spectroscopy

Optical sensing techniques for temperature measurement

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