KINDAI UNIVERSITY


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Manabu Fuchihata

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FacultyDepartment of Mechanical Engineering / Graduate School of Science and Engineering Research / Research Institute of Bio-coke
PositionProfessor
Degree
Commentator Guidehttps://www.kindai.ac.jp/meikan/935-fuchihata-manabu.html
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Last Updated :2019/12/09

Education and Career

Education

  •  - 1999 , Osaka University, Graduate School, Division of Engineering
  •  - 1988 , Osaka University, Faculty of Engineering

Academic & Professional Experience

  •   1999 04 ,  - 2002 03 , Research associate, Kinki University
  •   2002 04 ,  - 2007 03 , Lecturer, Kinki University
  •   2007 04 ,  - 2014 03 , Associate professor, Kinki University
  •   2014 04 ,  - 現在, Professor, Kinki University

Research Activities

Research Areas

  • Mechanical engineering, Thermal engineering

Research Interests

  • Combustion Engineering

Published Papers

  • Observation of the Carbonization Characteristics of a High Hardness Solid Biomass Fuel, FUCHIHATA Manabu, NAKAI Shingo, MIZUNO Satoru, Journal of the Japanese Society for Experimental Mechanics, 19(3), 195 - 202, Sep. 2019 , Refereed
  • Effect of dispersed water droplet diameter in light oil-water emulsion fuel on diesel engine operating performance, TENTORA Takahumi, FUCHIHATA Manabu, Transactions of the JSME, 85(875), p. 18-00399, Jul. 2019 , Refereed
  • Observation of the Transient Gasification Characteristics of a Biomass Under the Coexistence Atmosphere of CO2 and H2O, Manabu FUCHIHATA, Satoru MIZUNO and Keisuke TAZUKE, Journal of Smart Processing, 5(2), 122 - 128, Mar. 2016 , Refereed
  • Carbonization and Combustion Properties of a High Hardness Biomass Solid Fuel, FUCHIHATA Manabu, SHAKUTO Yuya, MIZUNO Satoru, IDA Tamio, Journal of Smart Processing, スマートプロセス学会誌, 3(5), 295 - 301, 2014 , Refereed
    Summary:  Recently, biomasses attract much attention as a renewable energy resource. Biocoke, hereinafter called BIC, is one of the solid biomass fuels that are made from woody or herbaceous biomass by heat and compression processes. BIC is highly dense, has high hardness, has a high energy density, and is expected to be an alternative to coal coke. In the present study, the carbonization and combustion properties of a green tea BIC and a cypress BIC are experimentally examined. The experimental results show that the carbon residue of the BICs is higher than that of raw wood in spite being of the same material. Further, the weight reduction curve during the combustion process of the BIC carbide is similar to that of charcoal when the carbonization temperature is higher than 673 K. Consequently, it is considered that the BIC can maintain adequate hardness even if it is carbonized at the upper portion of a cupola furnace, and burns as an alternative to coal coke in the coke bed at the bottom of the cupola furnace.
  • Observation of Micro Premixed Flames Surrounded by High Temperature Burned Gas Flow, FUCHIHATA Manabu, IDA Tamio, KUWANA Kazunori, Journal of High Temperature Society, 高温学会誌, 36(5), 240 - 245, 2010 , Refereed
    Summary:  Flame structure of micro scale methane-air premixed flames is investigated experimentally. First, the uppermost and lowest flow rates which propagating flame could be formed are examined with simple single burner. Propagating flame is not stabilized on the simple single burner whose diameter is less than 4mm, despite the flow rate is well controlled between the expected velocity gradient limits for blow off and flash back. In addition, all the extinction mechanism observed for the burner diameter less than 4mm is blow off. It is, consequently, considered that the flame formed on the burner whose diameter is less than 4mm has other extinction mechanism in addition to blow off and flash back caused by flow velocity gradient. Secondly, the flame formed on the burner with pilot flame is observed. The flame is stabilized even on the burner whose diameter is 0.3mm. However, shape of the flame formed on the burner whose diameter is less than 1mm and at around lowest flow rate is near spherical. It is similar to the appearance of micro diffusion flames. On the other hand, the flame formed on the burner whose diameter is less than 0.5mm is not considered as propagating flame, because typical laminar propagating flame has a structure more than 0.5mm thickness at this condition. Therefore, it is supposed that the flame formed on the burner whose diameter is submillimeter and at around lowest flow rate is dominated by the diffusion mixing of oxygen and methane from the premixture and high temperature heat flux from the pilot gas flow.
  • Comminution and Combustion Properties of Mixture of Semi-Carbonized Woody Biomass and Coal, Journal of JSEM, 9, 36 - 41, Sep. 2009
  • Observation of Microexplosions in Spray Flames of Light Oil-Water Emulsions (3rd Report, Influence of the Diameter of Dispersed Water Droplets on the Spray Flame Structure):3rd Report, Influence of the Diameter of Dispersed Water Droplets on the Spray Fla, TAKEDA Shuko, FUCHIHATA Manabu, IDA Tamio, Transactions of the Japan Society of Mechanical Engineers Series C, 日本機械学会論文集 B編, 74(743), 1649 - 1654, 2008
    Summary:Microexplosions of light oil-water emulsified fuel droplets were successfully documented using a high-speed video camera with laser illumination. The local frequency of explosion occurrence, temperature profile and exhaust gas emission were measured in spray flames of water-in oil type emulsion formed using an air-assist atomizer with a ring pilot burner. Those results indicate that the flame structure changes as the water droplet diameter in the emulsion fuel was varied, even if the fuel components and their fractions were same. When fuel includes water droplets, whose median diameter was around 75μm, HC and CO emissions were reduced as compared to those for the fuel of smaller water droplet content. It is probable that if the water droplet diameter is uniform, avalanching microexplosions occur at certain local region in the flame, and the water content vaporizes almost at once and extinguishes the flame. It leads to HC and CO emission increase. When the water droplet diameters are large, atomizer atomizes those; therefore, emulsion droplets include various size of water droplet in the flame. Consequently, the avalanching microexplosion occurrence is avoided, and HC and CO emissions are reduced.
  • Effect of Citric Acid Addition on Transportation of Semi-Carbonized Fuel, 83, 782 - 787, Aug. 2004
  • Effects of magnetic field on combustion characteristics of laminar diffusion flame, 29(6), 291 - 295, Nov. 2003
  • Time.dependent spatial structures of mezzo.scale mixing processes with turbulent diffusion flame, 29(6), 285 - 290, Nov. 2003
  • Observation of Microexplosions in Spray Flames of Light Oil-Water Emulsions (2nd Report, Influence of Temporal and Spatial Resolution in High Speed Videography), FUCHIHATA Manabu, IDA Tamio, MIZUTANI Yukio, Transactions of the Japan Society of Mechanical Engineers Series C, 日本機械学会論文集 B編, 69(682), 1503 - 1508, 2003
    Summary:Microexplosions of light oil-water emulsified fuel droplets were successfully documented using a high speed video camera with laser illumination. The temperature profile and the local frequency of explosion occurrence were estimated in open spray flames of water-in-oil type emulsion formed using an air-assist atomizer with a set of ring pilot burners. The estimates of the local frequency of the explosion occurrence were made in the upstream region of spray flames, since their temperature profiles indicated that the heat release was accelerated in the upstream region from the nozzle tip up to the height of 80 mm. Microexplosions were frequently observed in the upstream region where no microexplosion phenomenon was observed in the former study. In addition, all of those had very small spatial and temporal scales. It is probable that the principal factor having effects on the heat release of emulsion spray flame is not the microexplosions of larger droplets, as former theories predicted, but those of smaller ones. We, furthermore, observed the microexplosions of smaller droplets using an ultra high speed video camera, the frame rate of which was 106 frames/s. It was observed that the smaller droplets, whose diameter were less than 50 μm, exploded in the spray flame and their temporal and spatial scales were around 10 μs and 300 μm, respectively.
  • Measurement of instantaneous 2-D velocity field and local chemiluminescence in a premixed-spray flame by PIV and MICRO, Shohji TSUSHIMA, Masaaki NEGORO, Hiroyasu SAITOH, Manabu FUCHIHATA, Fumiteru AKAMATSU and Masashi KATSUKI, 494 - 510, Aug. 2002
  • Time-Averaged Observation of Laminar Counter-Flow Premixed Spray Flames and Some Discussion, 68(666), 590 - 595, 2002
  • Effects of a Uniform Magnetic Field on the Combustion and Emission Characteristics of Bunsen Flames, B67(657), 1262 - 1266, 2001
  • Pre-mixed Laminar Flames in a Uniform Magnetic Field, 125(1-2), 1071 - 1073, 2001
  • Observatoin of Flame Structure at Low Damkoehler Number Fields., FUCHIHATA Manabu, KATSUKI Masashi, MIZUTANI Yukio, Transactions of the Japan Society of Mechanical Engineers Series C, 日本機械学会論文集 B編, 66(652), 3249 - 3255, 2000
    Summary:We discussed the flame structure of piloted lean turbulent premixed flames, equivalence ratios of which were around the lean flammable limit. Laser tomography, chemiluminescence detectors, LDV and a thermocouple were used simultaneously for observing lean turbulent premixed flames with silica powder seeded. As a result, the transition of flame structure from a distributed reaction zone to a wrinkled laminar flame was observed in detail with the observing position being traversed from upstream to downstream.
  • Observation of Micro-Explosions in Spray Flames of Light Oil-Water Emulsions., MIZUTANI Yukio, FUCHIHATA Manabu, MATSUOKA Yoshio, MURAOKA Masaaki, Transactions of the Japan Society of Mechanical Engineers Series C, 日本機械学会論文集 B編, 66(646), 1544 - 1549, 2000
    Summary:The micro-explosion of emulsified fuel droplets was successfully observed, and the distribution pattern of local frequency of explosion occurrence was estimated in open spray flames of water-in-oil type light oil-water emulsion formed using a twin-fluid (air) atomizer with a ring pilot burner. A schlieren optical system with a deep-cut type knife-edge was adopted for back light illumination, and the process of micro-explosion of each droplet was recorded by a high-speed video camera with an image intensifier. Almost all the patterns of micro-explosion having been observed for single suspended emulsion drops were seen occurring also in the present spray flames. The frequency of micro-explosion occurrence increased as the water fraction in the emulsion was raised or agitation period was elongated. It appears that this frequency increases suddenly from 90 mm above the fuel injection nozzle. It is highly probable, however, that micro-explosion starts somewhere more upstream without being observed due to the difficulty in observation resulted from the excessive density of droplets, since the effect of water addition is most prominent in the upstream region.
  • Observation of the Structure of a Spherical Flame Formed in a Suspended Droplet Cloud by Spark Ignition., NAKABE Kazuyoshi, MIZUTANI Yukio, FUCHIHATA Manabu, AKAMATSU Fumiteru, ZAIZEN Masataka, EL-EMAM Salah Hassan, Transactions of the Japan Society of Mechanical Engineers Series C, 日本機械学会論文集 B編, 58(548), 1337 - 1342, 1992
    Summary:A droplet suspension of liquid fuel produced by an ultrasonic atomizer was spark-ignited. The flame ball propagating outwards was visualized in order to elucidate the mechanism of flame propagation and the complicated group structure of spray flames. It was found that a nonluminous flame was propagating continuously through a gas-phase mixture followed by luminous flamelets, so that a number of small-scaled droplet clusters with luminous emissions were observed behind the flame front propagating in premixed combustion mode. This fact implies that the group structure of a spray flame is not simple but complex.

Conference Activities & Talks

  • The possibility and the ripple effect of a energy independent city,   2002 06
  • The possibility of a district energy independence city with woody biomass energy,   2002 08
  • Energy potential of forestry biomass in moutainous area,   2002 12
  • Woody biomass resources of the Ki peninsula and estimate method of its export quantity,   2003 06
  • Reappraisal of cascading rank for utility value of biomass,   2003 06
  • New Fuel BCDF: Hot briquetting method of cellulose, apanese cypress sawdust and KAIZUKAIBUKI,   2003 06
  • Woody Biomass Resources of the Kii peninsula and estimate Method of its export quantity,   2003 06

Misc

  • Observation of Ultra Lean Turbulent Premixed Flames Surrounded by Hot Burned Gas, 24, 4, 137,   1998
  • Observation of Micro-Explosions in Spray Flames of Light Oil-Water Emulsions, Yukio MIZUTANI, Manabu FUCHIHATA, Yoshio MATSUOKA, Masaaki MURAOKA, Transactions of the Japan Society of Mechanical Engineers B, 66, 646, 1544, 1549,   2000 , 10.1299/kikaib.66.646_1544
  • Observation of Micro-Explosions in Spray Flames of Light Oil-Water Emulsions (2nd Report, Influence of Temporal and Spatial Resolution in High Speed Videography), Manabu FUCHIHATA, Tamio IDA, Yukio MIZUTANI, Transactions of the Japan Society of Mechanical Engineers B, 69, 682, 1503, 1508,   2003 , 10.1299/kikaib.69.1503

Research Grants & Projects

  • Research about Flame Structures of Premixed Flames Formed at High Intensity Turbulent Flow Fields
  • Observation of Micro-Explosions in Spray Flames of Light Oil-Water Emulsified Fuel