• 1499 Citations
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19952019
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Research Output 1995 2019

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Article
2019

End-gas autoignition characteristics of PREMIER combustion in a pilot fuel-ignited dual-fuel biogas engine

Valipour Berenjestanaki, A., Kawahara, N., Tsuboi, K. & Tomita, E., Oct 15 2019, In : Fuel. 254, 115634.

Research output: Contribution to journalArticle

Biofuels
Biogas
Ignition
Gases
Engines
2018
3 Citations (Scopus)
pressure oscillations
spark ignition
Gas engines
natural gas
Internal combustion engines
2017
2 Citations (Scopus)

Characterisation of DME-HCCI combustion cycles for formaldehyde and hydroxyl UV–vis absorption

Azimov, U., Stylianidis, N., Kawahara, N. & Tomita, E., Dec 15 2017, In : Fuel. 210, p. 578-591 14 p.

Research output: Contribution to journalArticle

Formaldehyde
Hydroxyl Radical
Ignition
Ethers
Temperature
6 Citations (Scopus)

Chemical kinetics and CFD analysis of supercharged micro-pilot ignited dual-fuel engine combustion of syngas

Stylianidis, N., Azimov, U., Maheri, A., Tomita, E. & Kawahara, N., Sep 1 2017, In : Fuel. 203, p. 591-606 16 p.

Research output: Contribution to journalArticle

Dual fuel engines
Reaction kinetics
Dynamic analysis
Computational fluid dynamics
Hydrogen
1 Citation (Scopus)
Dual fuel engines
Reaction kinetics
Dynamic analysis
Computational fluid dynamics
Ignition
4 Citations (Scopus)
hydrogen engines
Hydrogen engines
thermodynamic efficiency
nitrogen oxides
Direct injection
2016
22 Citations (Scopus)
cogeneration
Biogas
Nitrogen oxides
nitrogen oxides
Internal combustion engines
11 Citations (Scopus)

Combustion characteristics of wet ethanol ignited using a focused Q-switched Nd: YAG nanosecond laser

Rahman, K. M., Kawahara, N., Tsuboi, K. & Tomita, E., Feb 1 2016, In : Fuel. 165, p. 331-340 10 p.

Research output: Contribution to journalArticle

Ethanol
Lasers
Ignition
Water
Water content
1 Citation (Scopus)

Densitometry and temperature measurement of combustion gas by X-ray Compton scattering

Sakurai, H., Kawahara, N., Itou, M., Tomita, E., Suzuki, K. & Sakurai, Y., Mar 1 2016, In : Journal of Synchrotron Radiation. 23, 2, p. 617-621 5 p.

Research output: Contribution to journalArticle

Compton scattering
X ray scattering
Temperature measurement
temperature measurement
Gases
17 Citations (Scopus)
Fuel injection
Ignition
Natural gas
Compaction
Gases
14 Citations (Scopus)

Local fuel concentration measurement through spark-induced breakdown spectroscopy in a direct-injection hydrogen spark-ignition engine

Rahman, K. M., Kawahara, N., Matsunaga, D., Tomita, E., Takagi, Y. & Mihara, Y., Aug 24 2016, In : International Journal of Hydrogen Energy. 41, 32, p. 14283-14292 10 p.

Research output: Contribution to journalArticle

Hydrogen engines
spark ignition
Direct injection
sparks
Internal combustion engines
2 Citations (Scopus)

Quantum cascade laser assisted time-resolved measurements of carbon dioxide absorption during combustion in DME-HCCI engine

Azimov, U., Kawahara, N. & Tomita, E., Oct 15 2016, In : Fuel. 182, p. 807-815 9 p.

Research output: Contribution to journalArticle

Quantum cascade lasers
Time measurement
Carbon Dioxide
Ignition
Carbon dioxide
2015
5 Citations (Scopus)
sparks
Electric sparks
vessels
breakdown
Spectroscopy
4 Citations (Scopus)

Effect of Bio-Gas Contents on SI Combustion for a Co-Generation Engine

Kim, Y., Kawahara, N., Tomita, E., Oshibe, H. & Nishikawa, K., Sep 1 2015, In : SAE Technical Papers. 2015-September, September

Research output: Contribution to journalArticle

Biogas
Engines
Carbon dioxide
Air intakes
Global warming
2 Citations (Scopus)
Dual fuel engines
Gas engines
Gas fuels
Methane
Engines
11 Citations (Scopus)

Spark discharge ignition process in a spark-ignition engine using a time series of spectra measurements

Kawahara, N., Hashimoto, S. & Tomita, E., Dec 1 2015, In : Proceedings of the Combustion Institute. 36, 3, p. 3451-3458 8 p.

Research output: Contribution to journalArticle

spark ignition
electric sparks
Internal combustion engines
Electric sparks
ignition
2014
15 Citations (Scopus)

Laser-induced plasma generation and evolution in a transient spray

Kawahara, N., Tsuboi, K. & Tomita, E., Jan 13 2014, In : Optics Express. 22, 1

Research output: Contribution to journalArticle

plasma generators
sprayers
lasers
fuel sprays
high speed cameras
6 Citations (Scopus)
Direct injection
sparks
Electric sparks
vessels
Visualization

Interaction between laser-induced plasma and fuel spray

Kawahara, N., 2013, In : The 1st Laser Ignition Conference. LIC83, p. 1-2 2 p.

Research output: Contribution to journalArticle

16 Citations (Scopus)
spark ignition
Direct injection
Internal combustion engines
engines
Hydrogen
142 Citations (Scopus)
Exhaust gas recirculation
Ignition
Diesel engines
Nitrogen oxides
Soot
18 Citations (Scopus)

UV-visible light absorption by hydroxyl and formaldehyde and knocking combustion in a DME-HCCI engine

Azimov, U., Kawahara, N. & Tomita, E., Aug 2012, In : Fuel. 98, p. 164-175 12 p.

Research output: Contribution to journalArticle

Formaldehyde
Hydroxyl Radical
Light absorption
Ignition
Engines
2011
35 Citations (Scopus)

Comparison of performance and emissions of a supercharged dual-fuel engine fueled by hydrogen and hydrogen-containing gaseous fuels

Roy, M. M., Tomita, E., Kawahara, N., Harada, Y. & Sakane, A., Jun 2011, In : International Journal of Hydrogen Energy. 36, 12, p. 7339-7352 14 p.

Research output: Contribution to journalArticle

Dual fuel engines
gaseous fuels
hydrogen fuels
engines
Hydrogen
14 Citations (Scopus)
diesel engines
Infrared lasers
residual gas
infrared lasers
Diesel engines
34 Citations (Scopus)
exhaust emission
Dual fuel engines
synthesis gas
ignition
Ignition
7 Citations (Scopus)

Effects of injection pressure, timing and EGR on combustion and emissions characteristics of diesel PCCI engine

Kiplimo, R., Tomita, E., Kawahara, N., Zhou, S. & Yokobe, S., Jan 1 2011, In : SAE Technical Papers.

Research output: Contribution to journalArticle

Diesel engines
Smoke
Engines
Exhaust gas recirculation
Fuel consumption
7 Citations (Scopus)

High-pressure hydrogen jet and combustion characteristics in a direct-injection hydrogen engine

Roy, M. K., Kawahara, N., Tomita, E. & Fujitani, T., Jan 1 2011, In : SAE Technical Papers.

Research output: Contribution to journalArticle

Hydrogen engines
Direct injection
Electric sparks
Hydrogen
Ignition
9 Citations (Scopus)
Dual fuel engines
Ignition
Gases
22 Citations (Scopus)
Dual fuel engines
synthesis gas
computational fluid dynamics
Reaction kinetics
engines
45 Citations (Scopus)
Dual fuel engines
Gas engines
Ignition
Natural gas
Gases

非定常噴霧におけるレーザ誘起プラズマによる着火特性

Kawahara, N., 2011, In : 微粒化.

Research output: Contribution to journalArticle

2010
64 Citations (Scopus)

An experimental investigation on engine performance and emissions of a supercharged H2-diesel dual-fuel engine

Roy, M. M., Tomita, E., Kawahara, N., Harada, Y. & Sakane, A., Jan 2010, In : International Journal of Hydrogen Energy. 35, 2, p. 844-853 10 p.

Research output: Contribution to journalArticle

Dual fuel engines
Diesel engines
engines
Engines
Dilution
5 Citations (Scopus)

Characterization of the spray of the DISI multi-hole injector by means of phase doppler anemometer

Ahmed, F., Kawahara, N., Tomita, E. & Sumida, M., 2010, In : Journal of Thermal Science and Technology. 5, 1, p. 36-50 15 p.

Research output: Contribution to journalArticle

spark ignition
anemometers
Anemometers
Direct injection
Electric sparks
21 Citations (Scopus)

Direct microscopic image and measurement of the atomization process of a port fuel injector

Esmail, M., Kawahara, N., Tomita, E. & Sumida, M., 2010, In : Measurement Science and Technology. 21, 7, 075403.

Research output: Contribution to journalArticle

Atomization
Injector
Breakup
atomizing
Drop breakup
10 Citations (Scopus)
sprayers
flames
extinction
injectors
evaluation
6 Citations (Scopus)

In situ fuel concentration measurement near a spark plug in a spray-guided direct-injection spark-ignition engine using infrared absorption method

Kawahara, N., Tomita, E., Kadowaki, T., Honda, T. & Katashiba, H., Oct 2010, In : Experiments in Fluids. 49, 4, p. 925-936 12 p.

Research output: Contribution to journalArticle

spark plugs
Spark plugs
spark ignition
Direct injection
Infrared absorption