• 1593 Citations
  • 22 h-Index
19952019

Research output per year

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Research Output

2019

3D CFD of auto-ignition at the end gas region in dual-fuel gas engine

Kawahara, N. & Tomita, E., Jan 1 2019.

Research output: Contribution to conferencePaper

Attainment of High Thermal Efficiency and Near-zero Emissions by Optimizing Injected Spray Configuration in Direct Injection Hydrogen Engines

Oikawa, M., Takagi, Y., Mihara, Y., Kawahara, N., Tomita, E. & Naitoh, K., Dec 19 2019, In : SAE Technical Papers. December

Research output: Contribution to journalConference article

CO2 concentration measurements inside expansion-compression engine under high EGR conditions using an infrared absorption method

Ahmed, F. B. M., Esmail, M. F. C., Kawahara, N. & Tomita, E., 2019, (Accepted/In press) In : Ain Shams Engineering Journal.

Research output: Contribution to journalArticle

Open Access

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

Plasma Temperature of Spark Discharge in a Lean-burn Spark-ignition Engine Using a Time Series of Spectra Measurements

Kawahara, N., Watanabe, M., Tomita, E., Nagano, Y. & Kitagawa, T., Dec 19 2019, In : SAE Technical Papers. December

Research output: Contribution to journalConference article

2018
6 Citations (Scopus)

Numerical Investigation of Natural Gas-Diesel Dual Fuel Engine with End Gas Ignition

Talekar, A., Lai, M. C., Tomita, E., Kawahara, N., Zeng, K. & Yang, B., 2018, In : SAE Technical Papers. 2018-April

Research output: Contribution to journalConference article

3 Citations (Scopus)
2017

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

3 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

8 Citations (Scopus)
1 Citation (Scopus)

High-speed visualization of fuel spray impingement in the near-wall region using a DISI injector

Kawahara, N., Kintaka, K. & Tomita, E., 2017, Selected Papers from the 31st International Congress on High-Speed Imaging and Photonics. SPIE, Vol. 10328. 1032817

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

7 Citations (Scopus)

Multidimensional CFD simulation of diesel spray combustion using chemical kinetics

Kawahara, N., Takeda, N. & Tomita, E., Jan 1 2017.

Research output: Contribution to conferencePaper

Multidimensional CFD simulation of diesel spray combustion using chemical kinetics

Kawahara, N., Takeda, N. & Tomita, E., 2017.

Research output: Contribution to conferencePaper

Visualization of combustion processes of internal combustion engines

Kawahara, N., Aug 30 2017, The Micro-World Observed by Ultra High-Speed Cameras: We See What You Don't See. Springer International Publishing, p. 261-275 15 p.

Research output: Chapter in Book/Report/Conference proceedingChapter

2016
26 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

14 Citations (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

1 Citation (Scopus)
18 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

17 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

2 Citations (Scopus)
2015
5 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

4 Citations (Scopus)
2 Citations (Scopus)

Experimental study on combustion characteristics of wet ethanol ignited by Laser-induced breakdown

Rahman, K. M., Kawahara, N., Tsuboi, K. & Tomita, E., Apr 20 2015, Laser Ignition Conference, LIC 2015. OSA - The Optical Society, (Laser Ignition Conference, LIC 2015).

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

1 Citation (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

16 Citations (Scopus)
2014

Laser-induced plasma generation and evolution in a transient spray

Kawahara, N., Tsuboi, K. & Tomita, E., Jan 13 2014, In : Optics Express. 22, 1, p. A44-A52

Research output: Contribution to journalArticle

15 Citations (Scopus)
7 Citations (Scopus)

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

18 Citations (Scopus)

Mixing process of direct injection hydrogen jet in a constant volume vessel by using spark-induced breakdown spectroscopy

Bin Abdul Rahman, M. T., Kawahara, N. & Tomita, E., Jan 1 2013, In : SAE Technical Papers. 11

Research output: Contribution to journalConference article

2 Citations (Scopus)

Effects of spray impingement, injection parameters, and EGR on the combustion and emission characteristics of a PCCI diesel engine

Kiplimo, R., Tomita, E., Kawahara, N. & Yokobe, S., May 1 2012, In : Applied Thermal Engineering. 37, p. 165-175 11 p.

Research output: Contribution to journalArticle

155 Citations (Scopus)

Spectrum analysis of chemiluminescence of a low sooting PCCI diesel engine operating with moderately early injection timing

Kiplimo, R., Tomita, E., Kawahara, N. & Yokobe, S., Dec 1 2012, p. 410-415. 6 p.

Research output: Contribution to conferencePaper

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

Azimov, U., Kawahara, N. & Tomita, E., Aug 1 2012, In : Fuel. 98, p. 164-175 12 p.

Research output: Contribution to journalArticle

21 Citations (Scopus)
2011

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 1 2011, In : International Journal of Hydrogen Energy. 36, 12, p. 7339-7352 14 p.

Research output: Contribution to journalArticle

37 Citations (Scopus)

Cycle-resolved residual gas concentration measurement inside a heavy-duty diesel engine using infrared laser absorption

Kawahara, N., Tomita, E., Ohtsuki, A. & Aoyagi, Y., Feb 3 2011, In : Proceedings of the Combustion Institute. 33, 2, p. 2903-2910 8 p.

Research output: Contribution to journalArticle

16 Citations (Scopus)
40 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

9 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

8 Citations (Scopus)
10 Citations (Scopus)