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Fumiaki Takahashi
Case Western Reserve University
131Publications
22H-index
1,537Citations
Publications 131
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#1Fumiaki Takahashi (Case Western Reserve University)H-Index: 22
Each year, fires in the wildland-urban interface (WUI)—the place where homes and wildlands meet or intermingle—have caused significant damage to communities. To contribute to firefighter and public safety by reducing the risk of structure ignition, fire blankets for wrapping a whole house have been investigated in the laboratory and prescribed wildland fires. The fire blankets aim to prevent structure ignition (1) by blocking firebrands to enter homes through vulnerable spots (gutters, eaves, ve...
#1Jiyuan Kang (Case Western Reserve University)
#2Fumiaki Takahashi (Case Western Reserve University)H-Index: 22
Last.James S. T'ien (Case Western Reserve University)H-Index: 17
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Intumescent coatings are used to protect structural steel from fires. In this study, morphological characteristics of expanded and charred intumescent coatings, which is a key factor of its thermal insulating mechanisms, have been studied using a computer tomography (CT)-based analysis method. Specimens of the charred materials are prepared by a laboratory-scale mass-loss cone heating method for measuring thermal insulation performance. Three types of coatings are exposed to three constant incid...
#1Viswanath R. KattaH-Index: 7
#2Fumiaki Takahashi (Case Western Reserve University)H-Index: 22
Last.Valeri I. Babushok (NIST: National Institute of Standards and Technology)H-Index: 22
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#1Fumiaki Takahashi (Case Western Reserve University)H-Index: 22
#2Viswanath R. KattaH-Index: 26
Last.Valeri I. Babushok (NIST: National Institute of Standards and Technology)H-Index: 22
view all 4 authors...
Abstract Computational studies have been performed for methane-air cup-burner (i.e., co-flow diffusion) flames with addition of phosphorous containing compounds (PCCs). The PCCs are: phosphoric acid, trimethyl phosphate (TMP), and dimethyl methylphosphonate (DMMP), and these are added to the oxidizer or fuel flow. Calculations (time-dependent) employing a 2D axisymmetric domain, detailed gas-phase chemistry and mixture-averaged diffusion, are employed to unravel the chemical inhibition and flame...
#1Jiyuan Kang (Case Western Reserve University)
#2Fumiaki Takahashi (Case Western Reserve University)H-Index: 22
Last.James S. T'ien (Case Western Reserve University)H-Index: 17
view all 3 authors...
Thermal insulating performance and char-layer properties have been studied for water-based intumescent coatings for structural steel fire protection using a new laboratory-scale mass-loss cone apparatus. A specimen (100 × 100 mm mild steel plate; the initial coating thickness: 0.3–2.0 mm) is placed horizontally and exposed to a constant incident radiant heat flux (25, 50, or 75 kW/m2). The apparent thermal conductivity of the expanding char layer is determined in situ based on real-time measurem...
#1Fumiaki Takahashi (Case Western Reserve University)H-Index: 22
#2Viswanath R. KattaH-Index: 26
Last.Michael C. Hicks (Glenn Research Center)H-Index: 8
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The two-stage combustion, local extinction, and flame-edge oscillations have been observed in single-droplet combustion tests conducted on the International Space Station. To understand such dynamic behavior of initially enveloped diffusion flames in microgravity, two-dimensional (axisymmetric) computation is performed for a gaseous n-heptane flame using a time-dependent code with a detailed reaction mechanism (127 species and 1130 reactions), diffusive transport, and a simple radiation model (f...
#1Fumiaki Takahashi (Case Western Reserve University)H-Index: 22
#2Viswanath R. KattaH-Index: 26
Last.Valeri I. BabushokH-Index: 22
view all 4 authors...
Abstract Computations of cup-burner flames in normal gravity have been performed using propane as the fuel to reveal the combustion inhibition and enhancement by the CF3Br (halon 1301) and potential alternative fire-extinguishing agents (C2HF5, C2HF3Cl2, and C3H2F3Br). The time-dependent, two-dimensional numerical code used includes a detailed kinetic model (up to 241 species and 3918 reactions), diffusive transport, and a gray-gas radiation model. The peak reactivity spot (i.e., reaction kernel...
#1Fumiaki Takahashi (Case Western Reserve University)H-Index: 22
#2Viswanath R. KattaH-Index: 7
Last.Valeri I. Babushok (NIST: National Institute of Standards and Technology)H-Index: 22
view all 4 authors...
Computation has been performed for a methane-air co-flow diffusion flame, in the cup-burner configuration, with a phosphorus-containing compound (PCC), dimethyl methylphosphonate (DMMP) or phosphoric acid, added to the oxidizer stream. The effectiveness of compounds in gaseous flame inhibition depends upon the additive and flame types, which lead to different reaction environments. The time-dependent axisymmetric numerical code, which includes a detailed kinetics model (77 species and 886 reacti...
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