Methodology to Achieve Pseudo 1-D Combustion System of Polymeric Materials Using Low-Pressured Technique

Migita, Tatsuya; Yamahata, Takumi; Strempfl, Patrick; Matsuoka, Tsuneyoshi; Nakamura, Yuji

doi:10.1007/s10694-019-00877-x

Cited by 6 publications

(3 citation statements)

References 18 publications

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“…The suppression of bubble formation was studied in an idealized, 1‐D, low pressure pseudo‐microgravity environment 9 . A molten layer that coated the solid PMMA spheres served to reduce bubble formation when the ambient pressure was decreased.…”

Section: Literature Reviewmentioning

confidence: 99%

“…In the context of established burning, not transient flame spread, Yang et al The suppression of bubble formation was studied in an idealized, 1-D, low pressure pseudo-microgravity environment. 9 A molten layer that coated the solid PMMA spheres served to reduce bubble formation when the ambient pressure was decreased. Bubble formation and bursting occurred regularly at atmospheric pressure ($100 kPa) but rarely at reduced pressures of 50 and 20 kPa.…”

Section: Literature Reviewmentioning

confidence: 99%

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Experimental study of molten bubble layer growth and bubble size distribution in post‐flame‐spread PMMA samples

et al. 2022

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Although thermoplastics possess many desirable traits as solidified materials, they are combustible and burn readily. Post burning samples of polymethylmethacrylate (PMMA) are the focus of this study. During flame spread, PMMA forms a bubble containing molten surface layer that influences the spread rate and the surface mass efflux. This study examines the formation and distribution of bubbles inside a PMMA sample that has previously been subjected to flame spread and then re‐hardened into its solid state. Experiments discussed herein were conducted in a Narrow Channel Apparatus (NCA), which reduces the influences of gravitation (buoyancy) on flame spread. Bubble sizes and counts were determined using digital image analysis (DIA). The burnt samples were analyzed by dividing sample images into eight equal area sections. Frequency distributions of bubble size (area) were compared. Distribution functions were fitted against the empirical probability density function (PDF) for the bubble size distribution. The log‐normal distribution predicts the bubble size distribution for all segments. The bubble distribution function can be used to describe physical processes inside the polymeric material as it undergoes thermal transformation by the spreading flame.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

Experimental study of molten bubble layer growth and bubble size distribution in post‐flame‐spread PMMA samples

et al. 2022

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“…The fire dynamics small and thin fuels are also explored through ground-based microgravity experiments using drop towers [9] and parabolic flights [10][11][12][13][14]. In addition, combustion and fire experiments under reduced pressures [15][16][17] and a narrow channel [18] are applied to lower the influence of buoyancy and simulate low-gravity environments on Earth. Numerical simulations also provide essential information on the flame structure, quantify the experimental data, and verify microgravity combustion theory [6,19].…”

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confidence: 99%