Research Output 1979 2019

2019

Effect of devolatilization model on flame structure of pulverized coal combustion in a jet-burner system

Ahn, S., Watanabe, H. & Kitagawa, T., Apr 1 2019, In : Journal of Mechanical Science and Technology. 33, 4, p. 1973-1979 7 p.

Research output: Contribution to journalArticle

Coal combustion
Fuel burners
Turbulent flow
Reaction rates
Computational fluid dynamics

Experimental and numerical analysis of turbulent pulverized coal flame in a coaxial burner

Ahn, S., Tainaka, K., Watanabe, H. & Kitagawa, T., Jul 15 2019, In : Energy. 179, p. 727-735 9 p.

Research output: Contribution to journalArticle

Fuel burners
Numerical analysis
Coal
Momentum transfer
Coal combustion

Flamelet Model for a Three-Feed Non-premixed Combustion System with a Diluent Stream: Analysis and Validation of Quasi-Two-Dimensional Flamelet (Q2DF) Models

Yu, P., Watanabe, H., Zhang, W., Kurose, R. & Kitagawa, T., May 16 2019, In : Energy and Fuels. 33, 5, p. 4640-4650 11 p.

Research output: Contribution to journalArticle

Direct numerical simulation
Temperature

Flame-spread limit from interactive burning droplets in microgravity

Yoshida, Y., Iwai, K., Nagata, K., Seo, T., Mikami, M., Moriue, O., Sakashita, T., Kikuchi, M., Suzuki, T. & Nokura, M., Jan 1 2019, In : Proceedings of the Combustion Institute. 37, 3, p. 3409-3416 8 p.

Research output: Contribution to journalArticle

Microgravity
microgravity
flames
life (durability)
fibers

Numerical Investigation on the Detailed Structure of a Coaxial Coal Jet Flame Using Large-Eddy Simulation with Elementary Reactions

Ahn, S., Watanabe, H. & Kitagawa, T., May 16 2019, In : Energy and Fuels. 33, 5, p. 4621-4631 11 p.

Research output: Contribution to journalArticle

Coal
Polycyclic Aromatic Hydrocarbons
Large eddy simulation
Polycyclic aromatic hydrocarbons
Anthracene

Prediction of soot formation characteristics in a pulverized-coal combustion field by large eddy simulations with the TDP model

Takahashi, H., Hashimoto, N., Watanabe, H., Kurose, R. & Fujita, O., Jan 1 2019, In : Proceedings of the Combustion Institute. 37, 3, p. 2883-2891 9 p.

Research output: Contribution to journalArticle

Soot
Coal combustion
Large eddy simulation
soot
large eddy simulation
1 Citation (Scopus)

Simultaneous imaging of Mie scattering, PAHs laser induced fluorescence and soot laser induced incandescence to a lab-scale turbulent jet pulverized coal flame

Hayashi, J., Hashimoto, N., Nakatsuka, N., Tainaka, K., Tsuji, H., Tanno, K., Watanabe, H., Makino, H. & Akamatsu, F., Jan 1 2019, In : Proceedings of the Combustion Institute. 37, 3, p. 3045-3052 8 p.

Research output: Contribution to journalArticle

incandescence
Soot
turbulent jets
Coal
Polycyclic Aromatic Hydrocarbons

Unburned carbon measurement in fly ash using laser-induced breakdown spectroscopy with short nanosecond pulse width laser

Liu, R., Deguchi, Y., Nan, W., Hu, R., Wang, Z., Fujita, Y., Tanaka, S., Tainaka, K., Tanno, K., Watanabe, H., Liu, J. & Yan, J., Jan 1 2019, In : Advanced Powder Technology.

Research output: Contribution to journalArticle

Coal Ash
Laser induced breakdown spectroscopy
Fly ash
Laser pulses
Carbon
2018
1 Citation (Scopus)

Coal and Biomass Combustion

Jin, H., Luo, K., Stein, O., Watanabe, H. & Ku, X., Jan 1 2018, In : Journal of Combustion. 2018, 9654923.

Research output: Contribution to journalEditorial

Coal
biomass
coal
Biomass
3 Citations (Scopus)

Experimental and numerical investigation of effects of particle shape and size distribution on particles’ dispersion in a coaxial jet flow

Zhang, W., Tainaka, K., Ahn, S., Watanabe, H. & Kitagawa, T., Oct 1 2018, In : Advanced Powder Technology. 29, 10, p. 2322-2330 9 p.

Research output: Contribution to journalArticle

Coal
Velocity measurement
Polymers
Turbulence
Experiments

Lesと拡張 CPD モデルを用いた高炉羽口部の微粉炭燃焼挙動の予測

Kawashima, T., Murao, A., Yamamoto, N., Ando, M., Okada, J. & Watanabe, H., Dec 1 2018, In : Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan. 104, 12, p. 766-775 10 p.

Research output: Contribution to journalArticle

Open Access
Coal
Coal combustion
coal
predictions
Large eddy simulation

Measurement techniques for soot in pulverized coal combustion fields

Tainaka, K., Hashimoto, N., Umemoto, S., Nakatsuka, N., Hayashi, J., Watanabe, H., Akamatsu, F. & Makino, H., Jan 1 2018, In : Journal of the Society of Powder Technology, Japan. 55, 5, p. 275-281 7 p.

Research output: Contribution to journalReview article

Soot
Coal combustion
Lasers
Coal
Volume fraction
1 Citation (Scopus)

Numerical investigation of effects of particle shape on dispersion in an isotropic turbulent flow

Zhang, W., Watanabe, H. & Kitagawa, T., Sep 1 2018, In : Advanced Powder Technology. 29, 9, p. 2048-2060 13 p.

Research output: Contribution to journalArticle

Turbulent flow
Gases
Fluids
Flammability
Direct numerical simulation

Optical diagnostics for pulverized coal jet flame

Hayashi, J., Akamatsu, F., Nakatsuka, N., Hashimoto, N., Watanabe, H., Kurose, R., Tainaka, K., Tsuji, H. & Makino, H., Jan 1 2018, In : Journal of the Society of Powder Technology, Japan. 55, 3, p. 138-146 9 p.

Research output: Contribution to journalArticle

Coal
Lasers
2 Citations (Scopus)

Prediction of hot coke oven gas reforming by LES coupled with the extended flamelet/progress variable approach

Yu, P., Norinaga, K., Watanabe, H. & Kitagawa, T., Nov 1 2018, In : Fuel. 231, p. 234-243 10 p.

Research output: Contribution to journalArticle

Coke ovens
Large eddy simulation
Reforming reactions
Gases
Polycyclic Aromatic Hydrocarbons
2017
5 Citations (Scopus)

Direct numerical simulation of ignition of a single particle freely moving in a uniform flow

Zhang, W., Watanabe, H. & Kitagawa, T., Nov 1 2017, In : Advanced Powder Technology. 28, 11, p. 2893-2902 10 p.

Research output: Contribution to journalArticle

Direct numerical simulation
Ignition
Gases
Experiments
Methane
5 Citations (Scopus)

Effect of different fuel NO models on the prediction of NO formation/reduction characteristics in a pulverized coal combustion field

Hashimoto, N., Watanabe, H., Kurose, R. & Shirai, H., Jan 1 2017, In : Energy. 118, p. 47-59 13 p.

Research output: Contribution to journalArticle

Coal combustion
Bituminous coal
Furnaces
Moisture
Oxygen

Effects of oxygen enrichment on combustion instability under super lean and high EGR conditions

Kawasoe, Y., Harada, K., Hashimoto, H., Moriue, O. & Murase, E., Jan 1 2017.

Research output: Contribution to conferencePaper

Oxygen
Strain rate
Fuel burners
Ignition
Engines

Emission Spectroscopy of the C2 swan bands to estimate temperature of the near-extinction flamelets of turbulent premixed flames

Kawasoe, Y., Hashimoto, H., Moriue, O., Murase, E. & Furukawa, J., Jan 1 2017.

Research output: Contribution to conferencePaper

Swan bands
turbulent flames
premixed flames
Emission spectroscopy
extinction
8 Citations (Scopus)

Extension of the chemical percolation devolatilization model for predicting formation of tar compounds as soot precursor in coal gasification

Umemoto, S., Kajitani, S., Miura, K., Watanabe, H. & Kawase, M., Jan 1 2017, In : Fuel Processing Technology. 159, p. 256-265 10 p.

Research output: Contribution to journalArticle

Soot
Tars
Coal gasification
Tar
Coal
5 Citations (Scopus)

Flame spread of droplet-cloud elements with two-droplet interaction in microgravity

Mikami, M., Watari, H., Hirose, T., Seo, T., Saputro, H., Moriue, O. & Kikuchi, M., Jan 1 2017, In : Journal of Thermal Science and Technology. 12, 2, JTST0028.

Research output: Contribution to journalArticle

Microgravity
microgravity
flames
interactions
temperature distribution
11 Citations (Scopus)

Numerical analysis of particle dispersion and combustion characteristics on a piloted coaxial pulverized coal jet flame

Ahn, S., Tanno, K. & Watanabe, H., Jan 1 2017, In : Applied Thermal Engineering. 124, p. 1194-1202 9 p.

Research output: Contribution to journalArticle

Numerical analysis
Coal
Gases
Momentum transfer
Stream flow
10 Citations (Scopus)

Numerical investigation of effects of CO2recirculation in an oxy-fuel IGCC on gasification characteristics of a two-stage entrained flow coal gasifier

Watanabe, H., Ahn, S. & Tanno, K., Jan 1 2017, In : Energy. 118, p. 181-189 9 p.

Research output: Contribution to journalArticle

Gasification
Coal
Fuel systems
Air
Conversion efficiency

Numerical simulation of pulverized coal combustion and gasification

Watanabe, H., Jan 1 2017, In : Journal of the Society of Powder Technology, Japan. 54, 2, p. 130-137 8 p.

Research output: Contribution to journalReview article

Coal combustion
Coal gasification
Computer simulation
Large eddy simulation
Computer hardware

Numerical study of effects of operation condition for oxygen blown coal gasifier in oxy-fuel IGCC

Tanno, K., Seongyool, A. & Watanabe, H., Jan 1 2017, Boilers and Heat Recovery Steam Generator; Combustion Turbines; Energy Water Sustainability; Fuels, Combustion and Material Handling; Heat Exchangers, Condensers, Cooling Systems, and Balance-of-Plant. American Society of Mechanical Engineers (ASME), (American Society of Mechanical Engineers, Power Division (Publication) POWER; vol. 1).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Coal gasification
Combustors
Coal
Oxygen
Gasification

Study on factors affecting shape characteristics of spherically propagating i-C8H18/O2/N2 turbulent flames using constant volume vessel

Nagano, Y., Tsuda, A., Noomo, A., Fukushima, T., Morita, M. & Kitagawa, T., Jan 1 2017.

Research output: Contribution to conferencePaper

Fractals
Turbulence
Fractal dimension
Internal combustion engines
2016
20 Citations (Scopus)

Experimental and theoretical analysis of cellular instability in lean H2-CH4-air flames at elevated pressures

Okafor, E. C., Nagano, Y. & Kitagawa, T., Apr 27 2016, In : International Journal of Hydrogen Energy. 41, 15, p. 6581-6592 12 p.

Research output: Contribution to journalArticle

flames
Hydrogen
air
hydrogen
Air

Improved Measurement Characteristics of Elemental Compositions Using LaserInduced Breakdown Spectroscopy

Wang, Z., Deguchi, Y., Katsumori, S., Ikutomo, A., Yan, J., Liu, J., Tainaka, K., Tanno, K., Watanabe, H. & Kurose, R., Jan 1 2016, In : Spectroscopy (Santa Monica). 31, 1, p. 22-35 14 p.

Research output: Contribution to journalArticle

Coal Ash
Laser induced breakdown spectroscopy
laser-induced breakdown spectroscopy
gas spectroscopy
breakdown
15 Citations (Scopus)
Coal
Coal combustion
Numerical analysis
Furnaces
Heat transfer
2 Citations (Scopus)

Numerical investigation of reaction kinetics of coal volatiles with a detailed chemistry and its simplification

Ahn, S., Watanabe, H., Shoji, T. & Umemoto, S., May 26 2016, In : Journal of Thermal Science and Technology. 11, 1, JTST0014.

Research output: Contribution to journalArticle

Coal
Hydrocarbons
simplification
Reaction kinetics
coal
5 Citations (Scopus)

Primary soot particle distributions in a combustion field of 4 kw pulverized coal jet burner measured by time resolved laser induced incandescence (TiRe-LII)

Hashimoto, N., Hayashi, J., Nakatsuka, N., Tainaka, K., Umemoto, S., Tsuji, H., Akamatsu, F., Watanabe, H. & Makino, H., Jan 1 2016, In : Journal of Thermal Science and Technology. 11, 3, JTST0049.

Research output: Contribution to journalArticle

incandescence
Soot
Coal
burners
soot
2015
3 Citations (Scopus)

Effects of parcel modeling on particle dispersion and interphase transfers in a turbulent mixing layer

Watanabe, H., Uesugi, D. & Muto, M., Nov 1 2015, In : Advanced Powder Technology. 26, 6, p. 1719-1728 10 p.

Research output: Contribution to journalArticle

Momentum transfer
Mass transfer
Direct numerical simulation
Particle size analysis

Influences of Turbulence Scale on Development of Spherically Propagating Flame under High EGR Conditions

Nagano, Y., Kitagawa, T., Ohta, A., Takakura, S., Tajima, Y. & Takahashi, N., Sep 1 2015, In : SAE Technical Papers. 2015-September, September

Research output: Contribution to journalConference article

Exhaust gas recirculation
Turbulence
Internal combustion engines
Quenching
Air

Numerical simulation of two stage entrained flow coal gasifier with recycled CO2 injection

Tanno, K., Watanabe, H., Umetsu, H. & Umemoto, S., Jan 1 2015.

Research output: Contribution to conferencePaper

Coal gasification
Water gas shift
Coal
Computer simulation
Oxygen
1 Citation (Scopus)

Simultaneous Observation of Combustion in Optical Rotary Engine by Bottom View and Side View

Karatsu, Y., Minota, S., Hashimoto, H., Moriue, O., Murase, E., Yun, J. H. & Kagawa, R., Sep 1 2015, In : SAE Technical Papers. 2015-September, September

Research output: Contribution to journalArticle

Rotary engines
Rotors
Engines
High speed cameras
2014

A study on the direct control of the start of homogeneous charge compression ignition combustion by pulsed flame jet with rapid compression expansion machine

Murase, E., Moriue, O., Hashimoto, H., Nakashima, F. & Komai, Y., Jan 1 2014, In : International Journal of Engine Research. 15, 5, p. 549-556 8 p.

Research output: Contribution to journalArticle

Plant expansion
Ignition
Combustion chambers
Gases
38 Citations (Scopus)

Effects of hydrogen concentration on premixed laminar flames of hydrogen-methane-air

Okafor, E. C., Hayakawa, A., Nagano, Y. & Kitagawa, T., Feb 4 2014, In : International Journal of Hydrogen Energy. 39, 5, p. 2409-2417 9 p.

Research output: Contribution to journalArticle

premixed flames
equivalence
Methane
methane
Hydrogen
1 Citation (Scopus)

Turbulent Burning Velocities of Stoichiometric Hydrogen-Carbon Monoxide-Air Flames at Elevated Pressures

Okafor, E. C., Fukuda, Y., Nagano, Y. & Kitagawa, T., Oct 13 2014, SAE 2014 International Powertrains, Fuels and Lubricants Meeting, FFL 2014. SAE International, Vol. 2014-October.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Carbon monoxide
Hydrogen
Air
Turbulence
Alternative fuels
2013
1 Citation (Scopus)

A study on equivalence-ratio dependence of minimum ignition energy based on initial burning velocity

Murase, E., Moriue, O., Hashimoto, H. & Matsuzaki, I., Oct 14 2013, In : Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B. 79, 805, p. 1839-1847 9 p.

Research output: Contribution to journalArticle

ignition
Ignition
equivalence
flames
energy
4 Citations (Scopus)

Effects of droplet interaction on spontaneous ignition of an n-decane droplet pair

Moriue, O., Nishiyama, Y., Yamaguchi, Y., Hashimoto, H. & Murase, E., Jan 1 2013, In : Proceedings of the Combustion Institute. 34, 1, p. 1585-1592 8 p.

Research output: Contribution to journalConference article

ignition
Ignition
flames
interactions
flame temperature
1 Citation (Scopus)

Effects of hydrogen concentration on stoichiometric H2/CH 4/air premixed turbulent flames

Okafor, E. C., Nagano, Y. & Kitagawa, T., Dec 19 2013.

Research output: Contribution to conferencePaper

Hydrogen
Air
Turbulence
Combustion chambers
Fans

Experimental and numerical studies on burning velocities and Markstein numbers of lean laminar H2/CH4/air flames

Okafor, E. C., Toyoda, M., Hayakawa, A., Nagano, Y. & Kitagawa, T., 2013, Proceedings of the 9th Asia-Pacific Conference on Combustion, ASPACC 2013. Korean Society of Combustion

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Air
Hydrogen
Experiments
Temperature
2012
9 Citations (Scopus)

Analysis of turbulent burning velocity of spherically propagating premixed flame with effective turbulence intensity

Hayakawa, A., Miki, Y., Nagano, Y. & Kitagawa, T., Nov 21 2012, In : Journal of Thermal Science and Technology. 7, 4, p. 507-521 15 p.

Research output: Contribution to journalArticle

premixed flames
Turbulence
turbulence
flames
turbulent flames
2 Citations (Scopus)

One-dimensional flame propagation and auto-ignition of end gas in constant volume vessel

Nagano, Y., Ohira, T., Oonaka, M., Uyama, Y. & Kitagawa, T., 2012, Proceedings of the 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012. p. 591-596 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ignition
Flame
Vessel
Propagation
Gases

Preface

Murase, E., 2012, In : Unknown Journal.

Research output: Contribution to journalEditorial

Studies on the direct control of the start of HCCI combustion with rapid compression expansion machine

Komai, Y., Nakashima, F., Hashimoto, H., Moriue, O. & Murase, E., 2012, Proceedings of the 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012. p. 446-451 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ignition
Combustion
Compression
Charge
Flame
2011

Combustion properties of hydrogen/air mixture with and without dilution

Nagano, Y., Takeo, T., Tomari, K., Hayakawa, A., Kobayashi, S. & Kitagawa, T., Dec 1 2011, SAE Technical Papers.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Dilution
Hydrogen
Air
2 Citations (Scopus)

Effects of CO2 and N2 dilutions on laminar and turbulent flame propagation

Hayakawa, A., Miki, Y., Kobayashi, S., Nagano, Y. & Kitagawa, T., Dec 1 2011, SAE Technical Papers.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Dilution
Exhaust gas recirculation
Internal combustion engines

Effects of diluent gases on combustion of coal gasification gas: Comparison between N 2and CO 2 dilutions

Nagano, Y., Kado, K., Takeo, T., Miki, Y. & Kitagawa, T., 2011, ASME/JSME 2011 8th Thermal Engineering Joint Conference, AJTEC 2011.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Coal gasification
Dilution
Gases
Gasification
Temperature

Japan-Europe collaborative Droplet Array Combustion experiment in microgravity onboard TEXUS-46-technical achievements and preliminary scientific results

Kikuchi, M., Yamamoto, S., Yoda, S., Mikami, M., Nomura, H., Moriue, O., Umemura, A., Hisashi, Y., Sugano, N., Moesl, K., Sattelmayer, T., Eigenbrod, C. & Minster, O., Dec 1 2011, Proceedings of the 20th ESA Symposium on European Rocket and Balloon Programmes and Related Research. Vol. 700 SP. p. 473-478 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Microgravity
microgravity
droplet
Japan
combustion