Application of high-speed, species-specific chemiluminescence imaging for laminar flame speed and Markstein length measurements in spherically expanding flames

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

doi:10.1016/j.expthermflusci.2021.110477

Cited by 14 publications

(5 citation statements)

References 80 publications

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“…Figure provides the laminar flame speeds for Mix A at 1 atm, and 298 K. The shape is very similar to the one observed with other traditional hydrocarbons, with an observed maximum laminar flame speed of 38 cm/s at an equivalence ratio of 1.1. Moreover, the model is in excellent agreement with the new measurements, with the experimental uncertainties estimated below 3%, shown by the error bars. , To the best of the authors’ knowledge, a blend of four pentene isomers has not been recorded before for laminar flame speeds.…”

Section: Resultsmentioning

confidence: 99%

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Laminar Flame Speed, Ignition Delay Time, and CO Laser Absorption Measurements of a Gasoline-like Blend of Pentene Isomers

et al. 2023

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The combustion properties of a gasoline-like blend of pentene isomers were determined using multiple types of experimental measurements. The representative mixture (Mix A) is composed of 5.7% 1-pentene (1-C 5 H 10 ), 39.4% 2-pentene (2-C 5 H 10 ), 12.5% 2-methyl-1-butene (2M1B), and 42.4% 2-methyl-2butene (2M2B) (% mol). Laminar flame speeds were measured at equivalence ratios of 0.7−1.5 in a constant-volume combustion chamber, and ignition delay times (including both OH* and CH* diagnostics) as well as CO time-history profiles were performed in shock tubes, in highly diluted mixtures (0.995 He/Ar), at a stoichiometric condition for temperatures ranging from 1350 to 1750 K, and at near-atmospheric pressure. Two additional unbalanced mixtures removing either 2M2B (Mix B) or 2-C 5 H 10 (Mix C) were studied in a shock tube to collect CO time histories, representing the most stringent validation constraints, as these two pentenes constitute the biggest proportions in Mix A and exhibit opposite behaviors in terms of reactivity due to their chemical structure differences. Numerical predictions using a recent validated chemical kinetics mechanism encompassing all pentene isomers from Greǵoire et al. (Fuel2022, 323, 124223) are presented. The use of a complex blend of four pentene isomers in the present paper provided a capstone test of the current mechanism's ability to model pentene-isomer combustion chemistry, with very good results that reflect positively on the current state of the art in pentene isomer kinetics modeling.

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Section: Resultsmentioning

confidence: 99%

“…Moreover, the model is in excellent agreement with the new measurements, with the experimental uncertainties estimated below 3%, shown by the error bars. 39,40 To the best of the authors' knowledge, a blend of four pentene isomers has not been recorded before for laminar flame speeds.…”

Section: Resultsmentioning

confidence: 99%

Laminar Flame Speed, Ignition Delay Time, and CO Laser Absorption Measurements of a Gasoline-like Blend of Pentene Isomers

et al. 2023

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“…A Photron Fastcam SA1.1 camera with a rate of 10,000 fps was used in a Z-type schlieren imaging setup to capture the spherically propagating flame [39]. The collected images were then analyzed using an in-house Python code for edge detection, and the LFS was then calculated using the non-linear equation developed by Chen [40,41]. A known mass of fuel was introduced to the vessel via injection using a syringe, and the resulting partial pressure of fuel was then recorded using a 0-100 Torr pressure gauge.…”

Section: Flame Speed Vesselmentioning

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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“…Appropriate reaction mechanism can not only reveal the combustion process in the cylinder, but also effectively reduce the time and cost for testing, providing useful reference and guidance for engine control 27 . Among the several important fundamental parameters in chemical kinetic analysis process like laminar burning velocity (LBV), 28 Markstein length, 29 and the ignition delay time (IDT) 30 determined by mixture intrinsic properties is often used for representing the ignition features of premixed mixture, which significantly affects the heat release rate (HRR) and other relevant performance indicators (such as CA50, maximum cylinder pressure) 31,32 . For instance, Schonborn et al 33 .…”

Section: Introductionmentioning

confidence: 99%

“…26 Appropriate reaction mechanism can not only reveal the combustion process in the cylinder, but also effectively reduce the time and cost for testing, providing useful reference and guidance for engine control. 27 Among the several important fundamental parameters in chemical kinetic analysis process like laminar burning velocity (LBV), 28 Markstein length, 29 and the ignition delay time F I G U R E 1 Schematic of the test bench for NG-diesel dual fuel engine. NG, natural gas.…”

Section: Introductionmentioning

confidence: 99%

Chemical kinetic analysis on the auto‐ignition characteristics of natural gas–diesel dual‐fuel combustion under engine‐relevant conditions

Liu

Wang

Xie

et al. 2023

Int J of Chemical Kinetics

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With the advent of energy crisis and stringent emission regulations, natural gas (NG)/diesel dual‐fuel engines have entered the popular view. In this paper, the accurate boundary conditions are determined by the Converge model and the transient parameters were introduced into the chemical kinetics model to make the operating conditions more closely match the actual engine operating conditions. The effects of different methane/n‐heptane ratios, initial temperatures, initial pressures, and equivalence ratios on the IDT of methane/n‐heptane fuel mixtures were analyzed using comprehensive chemical kinetic tools such as mole fraction analysis, ROP analysis, and sensitivity analysis. The IDT of methane/n‐heptane mixture decreased significantly with increasing the equivalence ratio, initial pressure, and the proportion of n‐heptane in the mixture, but the change of temperature was more complicated for the IDT. The NTC behavior of methane/n‐heptane mixture was also affected by the NTC behavior of n‐heptane. With the increase of initial temperature, the consumption of methane and n‐heptane appeared to be significantly accelerated. The peak of radicals and intermediate groups appeared earliest and had the highest radical concentration when the n‐heptane content was 30%. With the increase of initial pressure, the peak moments of the six radicals were further advanced, but the mole concentrations of O, OH, H radicals decreased significantly. This paper not only provides a reference for the design of NG/diesel dual‐fuel engines, but also provides a theoretical basis and data support for improving the ignition and initial condition setting strategies of the engines.

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Application of high-speed, species-specific chemiluminescence imaging for laminar flame speed and Markstein length measurements in spherically expanding flames

Cited by 14 publications

References 80 publications

Laminar Flame Speed, Ignition Delay Time, and CO Laser Absorption Measurements of a Gasoline-like Blend of Pentene Isomers

Laminar Flame Speed, Ignition Delay Time, and CO Laser Absorption Measurements of a Gasoline-like Blend of Pentene Isomers

Experimental Kinetics Study on Diethyl Carbonate Oxidation

Chemical kinetic analysis on the auto‐ignition characteristics of natural gas–diesel dual‐fuel combustion under engine‐relevant conditions

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