J-GLOBAL         Last updated: Oct 22, 2019 at 11:21
Okayama University
Graduate School of Natural Science and Technology
Job title
Associate Professor
Dr(Kobe University)

Research Areas


Academic & Professional Experience

Nov 2018
Research Professor, Okayama University
- Associate Professor,Graduate School of Natural Science and Technology,Okayama University
 Researcher,1997-1999 Postdoctral Research Fellow of JSPS

Awards & Honors

2003 JSAE/SAE International Spring Fuels & Lubricants Meeting Oral Presentation Award Title: Transient Temperature Measurement of Unburned Gas in an Engine Cylinder Using Laser Interferometry with a Fiber-Optic Sensor

Published Papers

Berenjestanaki Alireza Valipour, Kawahara Nobuyuki, Tsuboi Kazuya, Tomita Eiji
FUEL   254    Oct 2019   [Refereed]
Kawahara Nobuyuki, Kim Yungjin, Wadahama Hisashi, Tsuboi Kazuya, Tomita Eiji
PROCEEDINGS OF THE COMBUSTION INSTITUTE   37(4) 4983-4991   2019   [Refereed]
Apoorv Talekar, Ming Chia Lai, Eiji Tomita, Nobuyuki Kawahara, Ke Zeng, Bo Yang
SAE Technical Papers   2018-April    Jan 2018
© 2018 SAE International. All Rights Reserved. The present study helps to understand the local combustion characteristics of PREmixed Mixture Ignition in the End-gas Region (PREMIER) combustion mode while using increasing amount of natural gas as ...
Yasuo Takagi, Hiroki Mori, Yuji Mihara, Nobuyuki Kawahara, Eiji Tomita
International Journal of Hydrogen Energy   42(41) 26114-26122   Oct 2017
© 2017 Hydrogen Energy Publications LLC A new combustion process called the Plume Ignition Combustion Concept (PCC), in which the plume tail of the hydrogen jet is spark-ignited immediately after the completion of fuel injection to accomplish comb...
Nobuyuki Kawahara, Shota Hashimoto, Eiji Tomita
Proceedings of the Combustion Institute   37(3) 3451-3458   Jan 2017
The spark discharge ignition process was evaluated through simultaneous temperature measurements of the spark discharges and the initial flame kernel. A time series of emission spectra from the spark discharge and initial flame kernel inside a spa...


Nobuyuki Kawahara, Eiji Tomita
12th Asia-Pacific Conference on Combustion, ASPACC 2019      Jan 2019
© Asia-Pacific Conference on Combustion, ASPACC 2019.All right reserved. The purpose of this study is to simulate the process of autoignition at the end gas region in dual-fuel gas engine under PREMIER combustion conditions using elementary chemic...
Nobuyuki Kawahara
The Micro-World Observed by Ultra High-Speed Cameras: We See What You Don't See   261-275   Aug 2017
© Springer International Publishing AG 2018. All rights reserved. Very fast visualization of fuel injection and spray impingement on the wall, the laser ignition process, and auto-ignition of the end-gas region due to flame propagation during the ...
Nearchos Stylianidis, Ulugbek Azimov, Nobuyuki Kawahara, Eiji Tomita
SAE Technical Papers   2017-September 394-404   Jan 2017
Copyright © 2017 SAE International. A chemical kinetics and computational fluid-dynamics (CFD) analysis was performed to evaluate the combustion of syngas derived from biomass and coke-oven solid feedstock in a micro-pilot ignited supercharged dua...
Nobuyuki Kawahara, Norihiro Takeda, Eiji Tomita
COMODIA 2017 - 9th International Conference on Modeling and Diagnostics for Advanved Engine Systems      Jan 2017
Copyright © 2017 by the Japan Society of Mechanical Engineers. The purpose of this study is to simulate the process from spray injection to spray combustion in a rapid compression machine (RCM) more precisely. Spray behavior and spray combustion w...
Cagdas Aksu, Nobuyuki Kawahara, Kazuya Tsuboi, Shun Nanba, Eiji Tomita, Morio Kondo
SAE Technical Papers   JSAE No.20159176/SAE 2015-01-1792    Sep 2015
© 2015 SAE Japan. A single cylinder, supercharged dual fuel gas engine with micro-pilot fuel injection is operated using methane only and methane-hydrogen mixtures. Methane only experiments were performed at various equivalence ratios and equivale...

Books etc

Natural Gas Engines For Transportation and Power Generation
KAWAHARA Nobuyuki (Part:Joint Work, Advanced Combustion in Natural Gas-Fueled Engines)
Springer   Jan 2018   
The Micro-World Observed by Ultra High-Speed Cameras
KAWAHARA Nobuyuki (Part:Joint Work, Visualization of Combustion Processes of Internal Combustion Engines)
Springer   Jan 2018