Author

Keiichi Okai

Observed names: K Okai, K. Okai, Keiichi OKAI, 岡井, 敬一

Institution: Japan Aerospace Exploration Agency

Observed institutions: Netherlands Aerospace Centre, Japan Aerospace Exploration Agency, The University of Tokyo

ORCID: 0000-0002-1626-3011

Observed ORCID: 0000-0002-1626-3011

OpenAlex ID: A5020452829

Effects of dilution by aromatic hydrocarbons on staged ignition behavior of n-decane droplets

2000 · O. Moriue, C. Eigenbrod, et al. · Proceedings of the Combustion Institute · 51

Pressure effects on combustion of methanol and methanol/dodecanol single droplets and droplet pairs in microgravity

2000 · K Okai, O Moriue, et al. · Combustion and Flame · 44

Development study of precooled-cycle hypersonic turbojet engine for flight demonstration

2007 · Tetsuya Sato, Hideyuki Taguchi, et al. · Acta Astronautica · 42

Combined laser induced ignition and plasma spectroscopy: Fundamentals and application to a hydrogen–air combustor

2007 · L. Zimmer, K. Okai, et al. · Spectrochimica Acta Part B Atomic Spectroscopy · 37

Design Study on a Small Pre-Cooled Turbojet Engine for Flight Experiments

2005 · Hideyuki Taguchi, Tetsuya Sato, et al. · AIAA International Space Planes and Hypersonic Systems and Technologies Conference · 33

Combustion of single droplets and droplet pairs in a vibrating field under microgravity

2000 · K. Okai, O. Moriue, et al. · Proceedings of the Combustion Institute · 23

Precooled turbojet engine flight experiment using balloon-based operation vehicle

2006 · K. Fujita, S. Sawai, et al. · Acta Astronautica · 22

Study on variable-shape supersonic inlets and missiles with MRD device

2007 · Hiroaki Kobayash, Yusuke Maru, et al. · Acta Astronautica · 21

Combustion behavior of single droplets for sooting and non-sooting fuels in direct current electric fields under microgravity

2002 · T. Ueda, O. Imamura, et al. · Proceedings of the Combustion Institute · 21

Design Study on Hypersonic Engine Components for TBCC Space Planes

2003 · Hideyuki Taguchi, Hisao Futamura, et al. · AIAA International Space Planes and Hypersonic Systems and Technologies Conference · 19

Effects of Fuel Type on Aircraft Electric Propulsion with SOFC/GT Hybrid Core

2017 · Keiichi Okai, Hiroshi Nomura, et al. · AIAA/SAE/ASEE Joint Propulsion Conference (JPC) · 18

Investigation of FC/GT Hybrid Core in Electrical Propulsion for Fan Aircraft

2015 · Keiichi Okai, Takehiro Himeno, et al. · AIAA/SAE/ASEE Joint Propulsion Conference (JPC) · 15

Multi-Row Disk Arrangement Concept for Spike of Axisymmetric Air Inlet

2004 · Yusuke Maru, Nobuhiro Tanatsugu, et al. · AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit · 15

Material Development Strategy of Lightweight Solid Oxide Fuel Cells for Airplane System Electrification

2019 · Shinichi Hashimoto, Tomohisa Hirota, et al. · ECS Transactions · 13

Electromagnetic analysis of fully superconducting motors employing dilute gas rotor and liquid hydrogen stator cooling structure

2023 · Yutaka Terao, Kazuki Akasaka, et al. · Journal of Physics Conference Series · 11

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A New Development Strategy of Light Wight Solid Oxide Fuel Cells for Electrified Airplane System

2019 · Shin-ichi Hashimoto, Ryuichi Miyata, et al. · AIAA Propulsion and Energy Forum · 11

Effects of DC electric fields on combustion of octane droplet pairs in microgravity

2003 · K Okai, T Ueda, et al. · Combustion and Flame · 10

Numerical Analysis of Variable Intake and Nozzle for Hypersonic Engines

2003 · Keiichi Okai, Hideyuki Taguchi, et al. · AIAA International Space Planes and Hypersonic Systems and Technologies Conference · 10

Spontaneous Ignition of Fuel Droplets in Lean Fuel-Air Mixtures

2006 · Mitsuhiro Tsue, Ryo Ishimaru, et al. · Journal of Propulsion and Power · 9

Summary of the engine system research using small jet engines in JAXA

2004 · Hisao Futamura, Keiichi Okai, et al. · Proceedings of the Korean Society of Propulsion Engineers Conference · 9

Potential of Aircraft Electric Propulsion with SOFC/GT Hybrid Core

2016 · Keiichi Okai, Takehiro Himeno, et al. · AIAA/SAE/ASEE Joint Propulsion Conference (JPC) · 8

Investigation of Combustion and Altitude-Ignition Performance of a Small Hydrogen-Fueled Reversed-Flow Turbine Combustor

2014 · Keiichi Okai, Takehiro Himeno, et al. · AIAA Aerospace Sciences Meeting · 8

Performance Analysis of a Fuel Cell Hybrid Aviation Propulsion System

2012 · Keiichi Okai, Hitoshi Fujiwara, et al. · AIAA International Energy Conversion Engineering Conference (IECEC) · 8

Firing Test of Core Engine for Pre-cooled Turbojet Engine

2008 · Hideyuki Taguchi, Tetsuya Sato, et al. · 한국추진공학회 학술대회논문집 · 8

Electromagnetic Analysis of Fully Superconducting Synchronous Machines for Future Turbo Electric Propulsion Systems

2020 · Yutaka Terao, Yusuke Ishida, et al. · AIAA Propulsion and Energy Forum · 7

Works count: 118

Citation count: 601

H-index: 13

I10-index: 18