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Yuji Nakamura
Toyohashi University of Technology
CombustionPremixed flameChemistryDiffusion flameFlame spread
147Publications
16H-index
726Citations
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Publications 172
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#1Anek Bunkwang (TUT: Toyohashi University of Technology)
#2Tsuneyoshi Matsuoka (TUT: Toyohashi University of Technology)H-Index: 3
Last. Yuji Nakamura (TUT: Toyohashi University of Technology)H-Index: 16
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#1Xinyan Huang (PolyU: Hong Kong Polytechnic University)H-Index: 14
#2Yuji Nakamura (TUT: Toyohashi University of Technology)H-Index: 16
Last. David L. Urban (Glenn Research Center)H-Index: 21
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#1Tatsuya Migita (TUT: Toyohashi University of Technology)
#2Takumi Yamahata (TUT: Toyohashi University of Technology)
Last. Yuji Nakamura (TUT: Toyohashi University of Technology)H-Index: 16
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The original version of this article unfortunately contained an error in Table 1 and text under Sect. 3.3.
1 CitationsSource
#1Tatsuya Migita (TUT: Toyohashi University of Technology)
#2Takumi Yamahata (TUT: Toyohashi University of Technology)
Last. Yuji Nakamura (TUT: Toyohashi University of Technology)H-Index: 16
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This paper provides the methodology to achieve pseudo 1-D combustion system of specific polymeric materials without any complex physical effect (e.g., deformation, bubble bursting etc.) by adopting a low pressure technique with a fuel-layered approach. The adopted pressure level in this study is as low as 20 kPa and the size of the specimen is sub-millimeter scale. By utilizing pressure modeling to keep the Grashof number small, the gravity effect is relatively minimized at low pressure to mimic...
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#1Xinyan Huang (PolyU: Hong Kong Polytechnic University)H-Index: 14
#2Yuji Nakamura (TUT: Toyohashi University of Technology)H-Index: 16
Electrical wires and cables have been identified as a potential source of fire in residential buildings, nuclear power plants, aircraft, and spacecraft. This work reviews the recent understandings of the fundamental combustion processes in wire fire over the last three decades. Based on experimental studies using ideal laboratory wires, physical-based theories are proposed to describe the unique wire fire phenomena. The review emphasizes the complex role of the metallic core in the ignition, fla...
3 CitationsSource
#1Tsuneyoshi Matsuoka (TUT: Toyohashi University of Technology)H-Index: 3
#2Akihiro Yoshimasa (TUT: Toyohashi University of Technology)
Last. Yuji Nakamura (TUT: Toyohashi University of Technology)H-Index: 16
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Fingering pattern formation of flame spread over a thick solid has been observed recently. Since the oxygen-enriched atmosphere in microgravity promotes the occurrence of fingering and thus it leads to a fire in space, it is important to understand the mechanism. Motivated by this, a previous study attempted to validate a similarity to smoldering fingering. However, it remains controversial because the quantitative evaluation of the fingering pattern was not satisfactory done due to the experime...
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#1Yuji Nakamura (TUT: Toyohashi University of Technology)H-Index: 16
#2Taichi Usuki (Hokkaido University)
Last. Kaoru Wakatsuki (Shinshu University)H-Index: 3
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The existing extinguishment device used in spacecraft is an inert gas (CO2) extinguisher or water mist which is a promising technique to suppress flames, however, the remained production of fume (harmful) gas in the enclosed space was paid little attention, although its removal from the cabin is not an easy task. We propose novel methodology, which can completely resolve this problem; namely, flame is extinguished by “a vacuuming operation” driven by the pressure difference between the suction b...
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#1Takuya Yamazaki (TUT: Toyohashi University of Technology)H-Index: 1
#2Tsuneyoshi Matsuoka (TUT: Toyohashi University of Technology)H-Index: 3
Last. Yuji Nakamura (TUT: Toyohashi University of Technology)H-Index: 16
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This paper provides alternative methodology to reproduce the smoldering of a 2-mm dia biomass stick in reduced gravity by utilizing a reduced-pressure approach. Since smoldering has been known as an initial process of fire hazard, a deep understanding of its characteristics is an important task to improve fire safety strategy in space. The aim of the present work is to examine the possibility to reproduce the smoldering in microgravity by utilizing the low pressure. The smoldering behavior and t...
1 CitationsSource
#1Shin-ya Morishima (Hiroshima University)H-Index: 1
#2Hiroshi YamashitaH-Index: 34
Last. Kazuhiko Koike (Hiroshima University)H-Index: 21
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Unlike most bivalve shellfishes, giant clams (tridacnines) harbor symbiotic microalgae (zooxanthellae) in their fleshy bodies. Zooxanthellae are not maternally inherited by tridacnine offspring, hence, the larvae must acquire zooxanthellae from external sources, although such algal populations or sources in the environment are currently unknown. It is well known that giant clams expel fecal pellets that contain viable zooxanthellae cells, but whether these cells are infectious or just an expelle...
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#1Yuji Nakamura (TUT: Toyohashi University of Technology)H-Index: 16
#2Hiroki Yoshitome (TUT: Toyohashi University of Technology)
Last. Jian Gao (CAS: Chinese Academy of Sciences)H-Index: 3
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Abstract Features of one-dimensional combustion-wave propagation of activated carbon particles (~ 1mm) packed in a quartz tube was examined experimentally. Rich oxygen was introduced into the tube to promote the surface oxidation of the activated carbon particles. An oxidizing mixture flows through a vertically placed quartz tube (from bottom to the top). Followed by the ignition at the top, hot reactive zone propagates downwardly with negligible regression of the specimen, so called “flame spre...
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