Effects of pressure and heat loss on the unstable motion of cellular-flame fronts caused by intrinsic instability in hydrogen-air lean premixed flames

Kadowaki, Shigenori; Aung, Thwe Thwe; Furuyama, Taisei; Kawata, K.; Katsumi, Toshiyuki; Kobayashi, Haruo

doi:10.1299/jtst.2021jtst0021

Cited by 9 publications

(1 citation statement)

References 37 publications

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“…Recently, the advanced techniques in laser and computer make it possible to obtain the data elucidating the cellular structure of hydrogen flames. The experiments on laser diagnostics were performed and the essential cellular flame parameters were revealed (Jin et al, 2015;Katsumi et al, 2015), and numerical simulation on the unstable behavior of premixed flames based on the detailed chemical reaction model was performed (Park et al, 2020;Kadowaki et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

The shape and fluctuation of hydrogen-propane-butane-air lean premixed flames formed on a flat flame burner

Nakatsuru

Kaewpradap

Nogi

et al. 2021

JTST

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In this paper, the characteristics of hydrogen-propane-butane-air lean premixed flames on a flat flame burner were experimentally studied. To elucidate the shape and fluctuation of premixed flames, the cell width, RMS of fluctuation, peak frequency and reconstructed attractor were obtained from the direct photographic images and time series of light emission intensity. The cellular flames were observed at sufficiently low equivalence ratios; the flat flames were found under the other conditions. When the concentration of hydrogen was higher, the flat flames were formed at lower equivalence ratios. As the equivalence ratio became lower, the cell width and RMS increased in the range of cellular flames, which was due to high instability level. At low (high) equivalence ratios, moreover, the size of attractor was large (small) and the trajectory was unstable (quasi periodic). The experimental results revealed the instability characteristics of hydrogen-propane-butane-air lean premixed flames, and the obtained findings were applicable to the safe control of lean premixed flames.

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Section: Introductionmentioning

confidence: 99%

The shape and fluctuation of hydrogen-propane-butane-air lean premixed flames formed on a flat flame burner

Nakatsuru

Kaewpradap

Nogi

et al. 2021

JTST

Self Cite

View full text Add to dashboard Cite

show abstract

Thermodiffusively-unstable lean premixed hydrogen flames: Phenomenology, empirical modelling, and thermal leading points

Howarth

Hunt

Aspden

2023

Combustion and Flame

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Thermodiffusively unstable laminar hydrogen flame in a sufficiently large 3D computational domain – Part I: Characteristic patterns

Wen,

Berger,

Cai

et al. 2024

Combustion and Flame

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Effects of pressure and heat loss on the unstable motion of cellular-flame fronts caused by intrinsic instability in hydrogen-air lean premixed flames

Abstract: Effects of pressure and heat loss on the unstable motion of cellular-flame fronts caused by intrinsic instability in hydrogen-air lean premixed flames

Cited by 9 publications

References 37 publications

The shape and fluctuation of hydrogen-propane-butane-air lean premixed flames formed on a flat flame burner

The shape and fluctuation of hydrogen-propane-butane-air lean premixed flames formed on a flat flame burner

Thermodiffusively-unstable lean premixed hydrogen flames: Phenomenology, empirical modelling, and thermal leading points

Thermodiffusively unstable laminar hydrogen flame in a sufficiently large 3D computational domain – Part I: Characteristic patterns

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