Resolving flame thickness using high-speed chemiluminescence imaging of OH* and CH* in spherically expanding methane–air flames

Turner, Mattias A.; Paschal, Tyler; Parajuli, Pradeep; Kulatilaka, Waruna D.; Petersen, Eric L.

doi:10.1016/j.proci.2020.07.112

Cited by 11 publications

(3 citation statements)

References 17 publications

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“…As discussed, dP*/dt was minimal and, therefore, was not included in modeling the experimental conditions. For LFS modeling, a one-dimensional laminar-flame simulation was performed using the Chemkin 19.1 package, using mixture averages transport and including the Soret effect [43]. To constrain the adaptive grid control parameter values, continuations were used, achieving between 1700 and 2000 grid points for each simulation [44].…”

Section: Modelingmentioning

confidence: 99%

Experimental Kinetics Study on Diethyl Carbonate Oxidation

Cooper

Grégoire

Almarzooq

et al. 2023

Fuels

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Diethyl carbonate (DEC) is a common component of the liquid electrolyte in lithium ion batteries (LIBs). As such, understanding DEC combustion chemistry is imperative to improving chemical kinetic modeling of LIB fires. To this end, a comprehensive experimental study was conducted to collect ignition delay times, CO time histories, and laminar flame speeds during DEC combustion. Ignition delay times were collected using a heated shock tube at real fuel–air conditions for three equivalence ratios (ϕ = 0.5, 1.0, and 2.0) near atmospheric pressure and for temperatures between 1182 and 1406 K. Another shock tube was used to collect CO time histories using a laser absorption diagnostic. These experiments were conducted for the same equivalence ratios, but highly diluted in argon and helium (79.25% Ar + 20% He) at an average pressure of 1.27 atm and a temperature range of 1236–1669 K. Finally, a heated constant-volume vessel was used to collect laminar flame speeds of DEC at an initial temperature and pressure of 403 K and 1 atm, respectively, for equivalence ratios between 0.79 and 1.38. The results are compared with different mechanisms from the literature. Good agreement is seen for the ignition delay time and flame speed measurements. However, significant deviations are observed for the CO time histories. A detailed discussion of the chemical kinetics is presented to elucidate the important reactions and direct future modeling efforts.

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Section: Modelingmentioning

confidence: 99%

Experimental Kinetics Study on Diethyl Carbonate Oxidation

Cooper

Grégoire

Almarzooq

et al. 2023

Fuels

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“…Thanks to the extended optical access of such configuration, a great level of detail could be obtained through the application of a portfolio of optical diagnostics, as described in an excellent review by Dreizler and Böhm [11]. For localisation of the flame reaction zone location and also determination of quenching distances, the use of chemiluminescence imaging in the visible range [12,13,14], Mie scattering from particles disappearing across the flame front such as incense particles [15], and planar laser induced fluorescence (LIF) of flame radicals such as OH were reported [8]. Apart from optical diagnostics, wall heat flux is used in [12,16] to infer the quenching distance.…”

Section: Introductionmentioning

confidence: 99%

Spatially resolved investigation of flame particle interaction in a two dimensional model packed bed

Khodsiani¹,

Namdar

Varnik

et al. 2024

Particuology

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“…The study demonstrated that the OH* chemiluminescence peak position is close to the position of the highest flame temperature, indicating that the position of the flame front can be characterized by the OH* chemiluminescence distribution. Turner et al utilized OH* chemiluminescence imaging in spherical laminar methane/air flames to characterize flame thickness. Shim et al .…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on OH, CH, and CO₂* Chemiluminescence Diagnosis of CH₄/O₂ Diffusion Flame with CO₂-Diluted Fuel

et al. 2022

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OH* and CH* chemiluminescence in hydrocarbon flames are often applied to characterize flame structure, equivalence ratio, strain rate, heat release rate, etc. In this study, chemiluminescence images of OH*, CH*, and CO 2 * in the CH 4 / O 2 diffusion flame were obtained using a CCD camera imaging system. The effect of CO 2 dilution on the flame structure, strain rate, and other flame characteristics of CH 4 /O 2 diffusion flame was discussed. The results show that CO 2 dilution greatly affects flame morphology and chemiluminescence intensity. There are quantitative functions between the chemiluminescence peak intensity of OH* and CH* and the CO 2 dilution level. The CO 2 * average intensity in the flame zone is better suited to characterize the dilution level than the CO 2 * peak intensity. Moreover, the strain rate of CO 2 -diluted laminar flame is defined. It is found that there is a linear relationship between the thickness of the OH* reaction zone and the square root of the strain rate.

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Resolving flame thickness using high-speed chemiluminescence imaging of OH* and CH* in spherically expanding methane–air flames

Cited by 11 publications

References 17 publications

Experimental Kinetics Study on Diethyl Carbonate Oxidation

Experimental Kinetics Study on Diethyl Carbonate Oxidation

Spatially resolved investigation of flame particle interaction in a two dimensional model packed bed

Experimental Study on OH, CH, and CO₂* Chemiluminescence Diagnosis of CH₄/O₂ Diffusion Flame with CO₂-Diluted Fuel

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Resolving flame thickness using high-speed chemiluminescence imaging of OH* and CH* in spherically expanding methane–air flames

Cited by 11 publications

References 17 publications

Experimental Kinetics Study on Diethyl Carbonate Oxidation

Experimental Kinetics Study on Diethyl Carbonate Oxidation

Spatially resolved investigation of flame particle interaction in a two dimensional model packed bed

Experimental Study on OH*, CH*, and CO2* Chemiluminescence Diagnosis of CH4/O2 Diffusion Flame with CO2-Diluted Fuel

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Product

Resources

About

Experimental Study on OH, CH, and CO₂* Chemiluminescence Diagnosis of CH₄/O₂ Diffusion Flame with CO₂-Diluted Fuel