Publication

2025

• "Measurement of Hot Surface Ignition Temperature of Some Low Global Warming Potential (GWP) Refrigerants and Their Blends"
  Tomohiko IMAMURA, Tomoki SAWAYAMA, Hiroki HAYAMIZU
  Proceedings of 11th Internagional Seminar on Fire and Explosion Hazards (2025).
• "Evaluation of Ignition Characteristics of Spouted Flammable Gases Impinging to a Hot Surface"
  Tomoki SAWAYAMA, Masato NAKAZAWA, Kazunori KUWANA, Tomohiko IMAMURA
  JAFSE Annual Symposium 2025 (2025).
• "Characteristics of Ignition and Pressure Rise of Hydrogen/Ammonia Blended Fuels"
  Yuta SETO and Tomohiko IMAMURA
  JAFSE Annual Symposium 2025 (2025).
• "Modeling Hot-surface Ignition of a Combustible Mixture"
  Kazunori KUWANA, Viriya-amornkij PICHAYAPORN, Masato NAKAZAWA, and Tomohiko IMAMURA
  JAFSE Annual Symposium 2025 (2025).
• "Indices for Ignitability Assessment of Hydrogen/Ammonia Blended Fuel Part 2: Minimum Ignition Energy"
  Tomohiko IMAMURA, Naoto KAWASHIMA, Shou KOMATSU, Jun-ichi SUEMATSU
  JAFSE Annual Symposium 2025 (2025).
• "Indices for Ignitability Assessment of Ammonia-Hydrogen Blended Fuel in Air. Part 1: Quenching distance"
  Jun-ichi SUEMATSU, Naoto KAWASHIMA, Shou KOMATSU, Tomohiko IMAMURA
  JAFSE Annual Symposium 2025 (2025).
• "Characteristics of pressure rise and flame propagation of hydrogen/ammonia/air premixture"
  Yuta SETO, Jun-ichi SUEMATSU, Yuki OHNO, Minori KAWAHARA, Tomohiko IMAMURA
  Proceedings of Asia-Pacific Symposium on Combustion (2025).
• "Correlation of minimum ignition energy with quenching distance of hydrogen/ammonia blended fuel in air"
  Tomohiko IMAMURA, Naoto KAWASHIMA, Shou KOMATSU, Jun-ichi SUEMATSU
  Proceedings of Asia-Pacific Symposium on Combustion (2025).
• "Dependence of the quenching distance on the plate diameter of electrode"
  Jun-ichi SUEMATSU, Naoto KAWASHIMA, Shou KOMATSU, Tomohiko IMAMURA
  Proceedings of Asia-Pacific Symposium on Combustion (2025).
• "Characteristics of Ignition Energy and Pressure Rise of Ammonia/Oxygen/Inert-gas Mixtures by a Laser-Induced Breakdown Spark Ignition "
  Tomohiko IMAMURA, Yuma NAKAMURA, Ko-ichiro HAYASHI, Daiki HOSAKA, Minori KAWAHARA
  International Journal of Fire Science and Engineering 39, 1, 63-77 (2025).

  • DOI: https://doi.org/10.7731/KIFSE.a5d217e6

2024

• "Ignition behavior of ammonia/oxygen premixture using a laser-induced breakdown spark"
  Minori KAWAHARA, Yuki OHNO, Tomohiko IMAMURA
  Annual Meeting of JSSE (2024).
• "Development of an Effective Extinguishing Method by Sucking a Flame Propagating alog a PE-coated Wire"
  Mahiro TSUCHIDA, Itsushi TANIMIZU, Tomohiko IMAMURA
  Annual Meeting of JSSE (2024).
• "Behaviors of Ignition and Pressure Rise Behavior of Hydrogen/Ammonia Blended Fuel by an Electric Spark"
  Yuta SETO and Tomohiko IMAMURA
  Annual Meeting of JSSE (2024).
• "Development of a Real-time Ignition Detection System for Combustible Premixed air Impinging on Hot Surfaces"
  Junya OHSHIRO and Tomohiko IMAMURA
  Annual Meeting of JSSE (2024).
• "Evaluation of Flammability by Impinging Flammable Gas to Hot Surface"
  Tomoki SAWAYAMA, Masato NAKAZAWA, Kazunori KUWANA, Tomohiko IMAMURA
  Annual Meeting of JSSE (2024).
• "Quenching Distance of Hydrogen/Ammonia/Air Premixtures"
  Shou KOMATSU, Naoto KAWASHIMA, Jun-ichi SUEMATSU, Tomohiko IMAMURA
  Annual Meeting of JSSE (2024).
• "Experimental study on evolution of a flame kernel propagating in the gap of parallel plate electrodes"
  Jun-ichi SUEMATSU, Naoto KAWASHIMA, Shou KOMATSU, Tomohiko IMAMURA
  The 62nd Symposium (Japanese) on Combustion (2024).
• "Characteristics of Ignition Energy and Pressure Rise of Ammonia/Oxygen/Inert-gas Mixtures by a Laser-Induced Breakdown Spark Ignition"
  Tomohiko IMAMURA, Yuma NAKAMURA, Ko-ichiro HAYASHI, Daiki HOSAKA
  Asia-Oceania Symposium on Fire Science and Technology 2024 (AOSFST2024) (2024).
• "Ignition Behavior of Hydrogen/Air Premixture Flowing in the Gap of Parallel Plate"
  Tomohiko IMAMURA, Yoshiki TABATA, Masaki YAMAKAWA, Jun-ichi SUEMATSU
  2024年度日本機械学会熱工学コンファレンス (2024).
• "Quantitative Identification of Arc Discharging Energy: For Accurate Risk Assessment of Alternative Refrigerants"
  Tomohiko IMAMURA, Masato TAKAGI, Ryosei HIRANO, Jun-ichi SUEMATSU
  Annual Meeting of JSRAE (2024).
• "Hot Surface Ignition Temperature on Next-Generative Low-GWP Refrigerant"
  Tomohiko IMAMURA, Tomoki SAWAYAMA, Hiroki HAYAMIZU
  Annual Meeting of JSRAE (2024).
• "Experimental study on effect of inert gas dilution for flammability of NH3/O2 mixtures"
  Tomohiko Imamura, Yuma Nakamura, Ko-ichiro Hayashi, Daiki Hosaka, Jun-ichi Suematsu
  Proceedings of Combustion Institute 40, 105308 (2024).

  • DOI: 10.1016/j.proci.2024.105308
• "Early Detection Method on Hot Surface Ignition of a Premixed Flammable Mixture"
  Tomohiko Imamura, Ko Endo, Nicharee Thinnakornsutibutr, Kazunori Kuwana
  JAFSE Annual Symposium 2024 (2024).
• "Development of a Prediction Method for Ignition of Propane/Air Premixture Impinging to a Hot Surface based on Anomaly Detection Method"
  Ko Endo, Tomohiko Imamura
  日本機械学会北陸信越支部2024年合同講演会 (2024).
• "Ignition Characteristics of Flowing Hydrogen/Air Premixture Impinging to a Hot Surface"
  Akiyoshi Yamada, Tomohiko Imamura
  日本機械学会北陸信越支部2024年合同講演会 (2024).
• "Ignition Control of Hydrogen by an Electric Spark Ignition Method and Inert Gas Addition"
  Yuta Seto, Tomohiko Imamura
  日本機械学会北陸信越支部2024年合同講演会 (2024).

2023

• "Dependences of the Critical Ignition Conditions of Propane/Air Premixture by a Hot Wire on the Equivalence Ratio and Energizing Duration"
  Yukito Ito, Tomohiko Imamura
  56th Annual Meeting of JSSE (2023).
• "Propagation Behavior of Initial Flame Kernel Generated between Horizontal Parallel Plate"
  Jun-ichi Suematsu, Tomohiko Imamura
  56th Annual Meeting on JSSE (2023).
• "Quenching Distance of Flowing Hydrogen/Air Premixed Gas"
  Masaki Yamakawa, Yoshiki Tabata, Jun-ichi Suematsu, Tomohiko Imamura
  56th Annual Meeting on JSSE (2023).
• "Flame Propagation Behavior along Inclined PE-Insulated Wire"
  Motoharu Tanaka, Shotaro Fukushima, Tomohiko Imamura
  56th Annual Meeting on JSSE (2023).
• "The effect of inert gas species on the combustion range with laser ignition"
  Daiki Hosaka, Yuma Nakamura, Ko-ichiro Hayashi, Tomohiko Imamura
  56th Annual Meeting on JSSE (2023).
• "Experiment on Vacuum Suction Extinction to Flame Propagating along Thin PE-Insulated Wire"
  Tomohiko IMAMURA, Tomohiro ISOGAI, Yuta TOKUDA
  Asia Pacific Symposium on Safety 2023 (APSS2023) (2023).
• "Experimental Study on Ignitability of R290/Air Premixture by an Arc Discharge at the Gap of Electric Contacts"
  Tomohiko IMAMURA
  Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers 40, 4, 193-204 (2023).
• "Critical Ignition Conditions for Propane/Air Premixtures Impinging on Electric Heated Surfaces: An Experimental Study"
  Tomohiko IMAMURA, Haruki SAKUMA, Masato NAKAZAWA, Kazunori KUWANA
  Fire Safety Journal 140, 103897 (2023).
• "Relationship between Transient Characteristics of Burning Velocity Just After Ignition and Quenching Distance"
  Jun-ichi SUEMATSU, Tomohiko IMAMURA
  The 29th International Colloquium on the Dynamics of Explosions and Reactive Systems (ICDERS2023), Paper ID: 340 (2023).
• "Experimental Study on Laser-Induced Spark Ignition of Some Flammable Premixtures"
  Tomohiko IMAMURA, Norimichi MORIZUMI, Yuki MIYAZAKI
  The 29th International Colloquium on the Dynamics of Explosions and Reactive Systems (ICDERS2023), Paper ID: 287, Accepted with Peer-review (2023).
• "Ignition Characteristics of a Premixed Propane/Air Mixture by a Vertical Hot Wire"
  Yukito ITO, Tomohiko IMAMURA
  JAFSE Annual Symposium 2023 (2023).
• "Relationship between Transient Characteristics of Burning Velocity Just After Ignition and Quenching Distance"
  Jun-ichi SUEMATSU, Tomohiko IMAMURA
  JAFSE Annual Symposium 2023 (2023).
• "Experimental Study on Vacuum Suction Extinguishment for Flame Propagating along a PE Insulation Wire"
  Tomohiko IMAMURA, Tomohiro ISOGAI, Yuta TOKUDA
  JAFSE Annual Symposium 2023 (2023).

2022

• "Characteristics of Quenching Distance of Premixed Flowing Propane/Air Mixture - Detailed Investigation of Flow Field in Prediction Model by CFD and PIV -"
  Jun-ichi SUEMATSU, Ryuto WATANABE, Tomohiko IMAMURA
  JSSE Annual Symposium 2022 (2022).
• "Effect of Directions and Dimensions of Heated Surface on Ignitability of Flowing Premixed Propane/air Mixture"
  Haruki SAKUMA, Masato NAKAZAWA, Kazunori KUWANA, Tomohiko IMAMURA
  JSSE Annual Symposium 2022 (2022).
• "Effect of Surface Reaction of Hot Wire on Ignitability of Propane/Air Mixture"
  Yukito ITO, Tomohiko IMAMURA
  JSSE Annual Symposium 2022 (2022).
• "Measurement of Laser-Breakdown Threshold of Various Premixed Flammable Mixtures"
  Yuki MIYAZAKI, Norimichi MORIZUMI, Tomohiko IMAMURA
  The 60th Japanese Combustion Symposium (2022).
• "Development of Prediction Model for Quenching Distance of Quiescent Premixed Gases"
  Jun-ichi SUEMATSU, Tomohiko IMAMURA
  The 60th Japanese Combustion Symposium (2022).
• "Experimental Study on Extinguishing Method by Vacuum Suction and Flame Propagation Along an Inclined Wire Sheathed with PE Insulator "
  Yuta TOKUDA, Tomohiro ISOGAI, Tomohiko IMAMURA
  The 60th Japanese Combustion Symposium (2022).
• "Experimental Evaluation of Ignitability for R290 with Various Ignition Sources"
  Tomohiko IMAMURA, Natsuru TOMITA, Yukito ITO, Motoya SATO, Kaito MOCHIZUKI
  2022年度日本冷凍空調学会年次大会 (2022).
• "リレー接点でのアーク放電によるプロパン／空気予混合気の着火性 －回路電流及び消費電力が着火性に及ぼす影響－"
  富田夏瑠，今村友彦
  安全工学シンポジウム2022 (2022).
• "Quenching Distance of Premixed Propane/Air Mixture Flowing Comparatively Slow Velocity"
  Tomohiko IMAMURA, Jun-ichi SUEMATSU, Hiroya YANAGI
  Journal of Safety Engineering 61, 3, 193-200 (2022).
• "Ignition Characteristics of a Premixed Propane/Air Mixture by a Hot Wire"
  Yukito Itou, Tomohiko IMAMURA
  JAFSE Annual Symposium 2022 (2022).
• "Modeling for Ignition of Premixed Flammable Gases by a Heated Surface"
  中澤誠人，王千翔，前島康之，桑名一徳，今村友彦
  JAFSE Annual Symposium 2022 (2022).
• "Development of Prediction Model of Quenching Distance for Flammable Propane/Air Premixed Mixture"
  Jun-ichi Suematsu, Hiroya Yanagi, Tomohiko IMAMURA
  JAFSE Annual Symposium 2022 (2022).
• "水素の可能性とテクノロジー～次世代エネルギーとしての観点から～"
  今村友彦
  令和4年度善光寺バレーコラボネット第1回例会記念講演 (2022).

2021

• "リレー接点でのアーク放電によるプロパン／空気予混合気の着火性"
  富田夏瑠，今村友彦
  第54回安全工学研究発表会 (2021).
• "加熱壁面に衝突するプロパン／空気予混合気の着火挙動"
  中澤誠人，王千翔，前島康之，桑名一徳，今村友彦
  第59回燃焼シンポジウム (2021).
• "比較的低流速で流動するプロパン／空気予混合気の消炎距離"
  今村友彦，末_潤一，柳弘也
  第59回燃焼シンポジウム (2021).
• "家庭用空調機器及び業務用冷凍冷蔵機器への適用を想定したR290冷媒の着火性評価"
  今村友彦，富田夏瑠，中澤誠人
  日本冷凍空調学会2021年度年次大会 (2021).
• "可燃性予混合気の熱面着火時間の相似則"
  桑名一徳，伊藤良馬，今村友彦
  実験力学会2021年度年次講演会 (2021).
• "流動するプロパン／空気予混合気の消炎距離"
  今村友彦，河合哲兵，嶋田壮志
  安全工学シンポジウム2021 (2021).
• "加熱壁面によるプロパン／空気予混合気の着火臨界条件の相似則"
  中澤誠人，鈴木悠大，竹田典一，桑名一徳，今村友彦
  安全工学シンポジウム2021 (2021).
• "流動するプロパン／空気予混合気の着火臨界条件に及ぼす熱面寸法の影響"
  今村友彦，鈴木悠大，竹田典一，中澤誠人，桑名一徳
  2021年度日本火災学会研究発表会 (2021).
• "Quasi-Steady Characteristics of Flowing Propane/Air Mixture Ignited by a Heated Surface"
  Tomohiko Imamura, Kosuke Uehara, Keita Nakata, Shoya Maruyama, Kazunori Kuwana
  Fire Safety Journal 120, 101325 (2021).
• "Critical Condition of Ignition for a Stagnation Flow of Premixed Propane/Air Mixture Impinging to a Heated Surface"
  Tomohiko Imamura, Sensho Oh, Yasuyuki Maejima, Yudai Suzuki, Norikazu Takeda, Masato Nakazawa, Kazunori Kuwana
  Proceedings of AOSFST2021 (2021).
• "Quenching Distance of Flowing Premixed Propane/Air Mixture with Comparatively Low-Velocity"
  Tomohiko Imamura, Jun-ichi Suematsu, Hiroya Yanagi, Teppei Kawai, Soushi Shimada
  Proceedings of AOSFST2021 (2021).
• "Experimental Evaluation on Ignition Sources of Hydrocarbon Refrigerant"
  Tomohiko Imamura
  Proceedings of The International Symposium on New Refrigeants and Environmental Technology 2020 (2021).

2020

• "加熱壁面に衝突する流動プロパン／空気混合気の着火条件の定常解析"
  今村友彦，中澤誠人，大江峻生，桑名一徳
  第53回安全工学研究発表会 (2020).
• "加熱壁面による循環するプロパン／空気混合気の着火特性に及ぼす燃料濃度の影響"
  中澤誠人，桑名一徳，今村友彦
  第58回燃焼シンポジウム (2020).
• "循環するプロパン／空気混合気の加熱壁面による着火のエネルギーと燃料濃度の影響"
  中澤誠人，苅谷優行，下村蓮，桑名一徳，今村友彦
  2020年度日本火災学会研究発表会 (2020).
• "加熱壁面に衝突する予混合淀み流の着火条件"
  飯塚洋行，桑名一徳，今村友彦
  日本火災学会論文集 70, 1, 1-8 (2020).
• "可燃性予混合気の熱面着火の相似則－加熱壁面に衝突する淀み流の場合－"
  桑名一徳，今村友彦
  実験力学 20, 4, 254-257 (2020).

2019

• "コンセントプラグの抜き差しによる滞留プロパンの着火性状"
  今村友彦，青木幹尚，春山智成
  第52回安全工学研究発表会 (2019).
• "高温表面による流動プロパンの着火特性"
  中澤誠人，苅谷優行，下村蓮，桑名一徳，今村友彦
  第57回燃焼シンポジウム (2019).
• "加熱壁面近傍の予混合淀み流中の着火・消炎に関する理論的検討"
  桑名一徳，今村友彦
  第57回燃焼シンポジウム (2019).
• "電気部品による次世代家庭用空調機冷媒の着火性評価"
  今村友彦，白籏恭平，成澤弘明
  2019年度日本冷凍空調学会年次大会 (2019).
• "Ignition Behavior of Flowing Propane by a Hot Surface"
  Proceedings of Asia Pacific Symposium on Safety 2019, 1185-1193 (2019).

2018

• "可燃性ガスの燃焼特性に及ぼす初期環境湿度の影"
  今村友彦，大月雅也，熊田昇太，古屋祐樹
  第51回安全工学研究発表会 (2018).
• "Influence of Initial Humidity on the Flame Propagation Rate of LPG/Air and LPG/O2/N2 Mixtures"
  Tomohiko Imamura, Masaya Ohtsuki, Shota Kumata, Yuki Furuya, Reito Ohno, Akira Tanaka and Akira Kawaguchi
  Proceedings of AOSFST2018 (2018).
• "Physical Hazard Assessment for Natural Refrigerant Assuming Application to the Room Air Conditioner"
  Tomohiko Imamura, Hiroyuki Takahashi, Shuhei Maejima, Osami Sugawa
  Proceedings of The International Symposium on New Refrigeants and Environmental Technology 2018 (2018).

2017

• "Full-scale experiment to evaluate the combustion hazard of refrigerants with low global-warming potential in a conceivable accident scenario"
  Tomohiko Imamura, Yasutaka Yoshida, Yoshinari Ohta, Koji Naito, Osami Sugawa
  International Journal of Refrigeration 82, 461-469 (2017).

2016

• "Experimental evaluation of the possibility of ignition and flame propagation in accumulated difluoromethane (R32) from a kerosene cigarette lighter"
  Tomohiko Imamura, Takuro Sano, Kazutaka Yuzawa, Osami Sugawa
  Journal of Loss Prevention in the Process Industries 43, 29-34 (2016).
• "微燃性冷媒の安全性評価"
  藤本悟，平良繁治，滝澤賢二，今村友彦，党超鋲
  日本冷凍空調学会論文集 33, 1, 1-12 (2016).

2015

• "Ignition hazard evaluation on A2L refrigerants in situations of service and maintenance"
  Tomohiko Imamura, Kyoko Kamiya, Osami Sugawa
  Journal of Loss Prevention in the Process Industries 36, 555-563 (2015).

2014

• "Modeling and analysis of water discharge trajectory with large capacity monitor"
  Tatsuya Miyashita, Osami Sugawa, Tomohiko Imamura, Kyoko Kamiya, Yasuo Kawaguchi
  Fire Safety Journal 63, 1-8 (2014).

2013

• "A2L冷媒滞留雰囲気下における市販電子ライターでの着火危険性評価"
  今村友彦，宮下達也，上矢恭子，須川修身
  安全工学 52, 2, 91-98 (2013).
• "Flame Behaviour on a Plane Slope Ground"
  Tomohiko Imamura, Osami Sugawa, Kyoko Kamiya
  Proceedings of the Seventh International Seminar on Fire and Explosion Hazards, 543-552 (2013).
• "Experimental Study on Ignition Hazards of Leaked A2L Refrigerant from a Pinhole"
  Tomohiko Imamura, Takanori Morimoto, Yuta Yamazaki, Kyoko Kamiya, Hiroyuki Mitsuishi, Osami Sugawa
  Proceedings of Asia Pacific Symposium on Safety 2013 (2013).

2012

• "微燃性冷媒搭載空調機器と化石燃料系暖房機器の同時使用時におけるフィジカルハザード評価"
  今村友彦，宮下達也，上矢恭子，森本崇徳，須川修身
  日本冷凍空調学会論文集 29, 4, 401-411 (2012).

2011

• "Flame Height of a Turbulent Diffusion Jet Flame with a Comparatively High Initial Discharging Velocity"
  Tomohiko Imamura, Osami Sugawa, Kyoko Kamiya, Yasushi Oka, Toshimitsu Suzuki, Yutaka Yamamoto
  Fire Science and Technology 29, 1, 15-26 (2011).

2010

• "Experimental Safety Evaluation on Flammability of R32 Refrigerant"
  Ryuzaburo Yajima, Michio Moriwaki, Osami Sugawa, Tomohiko Imamura
  23rd IIR International Congress of Refrigeration 23 (2010).

2009

• "Control of the ignition possibility of hydrogen by electrostatic discharge at a ventilation duct outlet"
  Tomohiko Imamura, Toshio Mogi, Yuji Wada
  International Journal of Hydorgen Energy 34, 6, 2815-2823 (2009).

2008

• "ダストを含む水素ガス噴出時の噴出系統での帯電特性の考察"
  今村友彦，茂木俊夫，堀口貞茲，小野亮
  安全工学 47, 2, 77-83 (2008).
• "Experimental investigation on the thermal properties of hydrogen jet flame and hot currents in the downstream region"
  Tomohiko Imamura, Shota Hamada, Toshio Mogi, Yuji Wada, Sadashige Horiguchi, Atsumi Miyake, Terushige Ogawa
  International Journal of Hydorgen Energy 33, 13, 3426-3435 (2008).
• "Correlation of temperature rise and velocity along an inclined fire plume axis in crosswinds"
  Yasushi Oka, Osami Sugawa, Tomohiko Imamura
  Fire Safety Journal 43, 6, 391-400 (2008).

2005

• "横風の影響を受けた火災プリュームトラジェクトリーのモデル化"
  岡泰資，須川修身，今村友彦，武石吉生，本間正彦
  日本火災学会論文集 55, 2, 49-56 (2005).
• "横風の影響を受けた火災プリューム幅に関する実験的研究"
  今村友彦，岡泰資，須川修身，武石吉生，小川輝繁
  日本火災学会論文集 55, 2, 41-47 (2005).

2003

• "Effect of cross-winds to apparent flame height and tilt angle from several kinds of fire source"
  Yasushi Oka, Osami Sugawa, Tomohiko Imamura, Yoshiyuki Matsubara
  Proceedings of 7th International Symposium on Fire Safety Science, 915-926 (2003).