Three-dimensional temperature gradients in premixed turbulent flamelets via crossed-plane Rayleigh imaging

Knaus, Darin A.; Sattler, S.S.; Gouldin, F. C.

doi:10.1016/j.combustflame.2005.01.008

Cited by 34 publications

(17 citation statements)

References 11 publications

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“…We can observe that σ N is not constant and strongly decreases, with a minimum at c = 0.8. Similar results concerning the evolution of the normalized cross section are mentioned in previous works [35][36][37] and show that Eq. (13) cannot be reduced without great approximations on temperature calculation.…”

Section: Rayleigh Scattering-background Theorysupporting

confidence: 85%

“…7 shows an experimental temperature profile obtained using this calculation method. We can observe a clean result for the temperature interval from 300 to 1500 K. At high temperatures, the noise effect becomes predominant due to a low Rayleigh-scattering signal level [37]. The experimental temperature is limited to computed adiabatic flame temperature since curve interpolation (Fig.…”

Section: Temperature Calculationmentioning

confidence: 97%

“…Since the Rayleigh scattering signal decreases with temperature, the uncertainty of temperature measurement due to shot noise, and thus of temperature gradient, increases across the flame front. One of the challenges in calculating the flame thickness is to fix the range of temperatures (lower and upper limit) for which the fitting procedure will lead to an accurate and meaningful measurement of (∇T ) max [37]. Indeed, it is not necessary to fit all the data from 300 K to the burnt gas, but only the zone where (∇T ) max is expected to be located.…”

Section: Gradient Computation and Validationmentioning

confidence: 98%

“…From the Rayleigh scattering signal, the temperature field T (x, y) and the normalized cross section σ N (x, y) can be computed iteratively, as mentioned by several authors [37,45]. The computation of T (x, y) and σ N (x, y) methods applied to our results is not an iterative method, but is also based on results from a computed flame library.…”

Section: Temperature Calculationmentioning

confidence: 99%

See 3 more Smart Citations

Experimental and numerical investigation of the effect of H2 enrichment on laminar methane–air flame thickness

Lafay

Renou

Cabot

et al. 2008

Combustion and Flame

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Section: Rayleigh Scattering-background Theorysupporting

confidence: 85%

Section: Temperature Calculationmentioning

confidence: 97%

Section: Gradient Computation and Validationmentioning

confidence: 98%

Section: Temperature Calculationmentioning

confidence: 99%

See 2 more Smart Citations

Experimental and numerical investigation of the effect of H2 enrichment on laminar methane–air flame thickness

Lafay

Renou

Cabot

et al. 2008

Combustion and Flame

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“…The influence of free stream on the statistics of a turbulent premixed V-flame is numerically investigated by Chan et al [3] and is compared to experimental results. Knaus et al [5], in an article using a new technique for obtaining instantaneous, high resolution, three dimensional thermal structure data from turbulent flames, crossed-plane Rayleigh imaging. This technique is used to measure temperature gradient data for a lean, premixed methane-air turbulent V-flame.…”

Section: Introductionmentioning

confidence: 99%

Scalar characteristics of a lean premixed turbulent V-shape flame (air-butane)

Boulahlib¹,

Boukebbab²,

Amara³

et al. 2008

WIT Transactions on Engineering Sciences

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This paper proposes an experimental study of the scalar fields of a lean V shape premixed turbulent flame. The thermometry with the thermocouple numerically compensated was used for determining the thermal fields of a premixed butaneair V shape flame. The structure of both the inert and reactive jet was studied for a Reynolds number of 7000. Turbulence is generated by a perforated grid situated upstream. The main results of the thermal field in the V shape flame have showed more important results and a representative form of the inner structure of the flame was then obtained. The study is to determine how the turbulence and equivalence ratio can affect the temperature field, the flame height, the variable progress and therefore the combustion process.

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An Overview of Combustion Diagnostics

Leipertz¹,

Pfadler²,

Schießl³

2010

Handbook of Combustion

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In this chapter, several of the diagnostic techniques commonly used to investigate combustion phenomena are reviewed, and a brief survey is provided of the mechanical probing techniques used to measure temperature, flow velocity, pressure and species concentrations (including flue gas diagnostics). The chapter includes an overview of optical techniques used for flow diagnostics, species concentration and temperature measurements in reacting flows. The use of imaging and multidimensional diagnostics for typical structures in the combustion field is also outlined. The simultaneous use of different planar measurement techniques describes state‐of‐the‐art of laser diagnostics in combustion research, and the potential for laser‐diagnostics to validate these approaches, as used in numerical simulations.

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Three-dimensional temperature gradients in premixed turbulent flamelets via crossed-plane Rayleigh imaging

Cited by 34 publications

References 11 publications

Experimental and numerical investigation of the effect of H2 enrichment on laminar methane–air flame thickness

Experimental and numerical investigation of the effect of H2 enrichment on laminar methane–air flame thickness

Scalar characteristics of a lean premixed turbulent V-shape flame (air-butane)

An Overview of Combustion Diagnostics

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