Keiichi Okai

566 total citations
71 papers, 426 citations indexed

About

Keiichi Okai is a scholar working on Aerospace Engineering, Computational Mechanics and Global and Planetary Change. According to data from OpenAlex, Keiichi Okai has authored 71 papers receiving a total of 426 indexed citations (citations by other indexed papers that have themselves been cited), including 42 papers in Aerospace Engineering, 29 papers in Computational Mechanics and 20 papers in Global and Planetary Change. Recurrent topics in Keiichi Okai's work include Advanced Aircraft Design and Technologies (20 papers), Advanced Combustion Engine Technologies (19 papers) and Rocket and propulsion systems research (18 papers). Keiichi Okai is often cited by papers focused on Advanced Aircraft Design and Technologies (20 papers), Advanced Combustion Engine Technologies (19 papers) and Rocket and propulsion systems research (18 papers). Keiichi Okai collaborates with scholars based in Japan, United States and Germany. Keiichi Okai's co-authors include Hideyuki Taguchi, Mitsuhiro Tsue, Takayuki Kojima, Junichi Sato, Masaru Kono, Osamu Moriue, Hiroshi Nomura, Tetsuya Sato, Hiroaki Kobayashi and Laurent Zimmer and has published in prestigious journals such as Combustion and Flame, Proceedings of the Combustion Institute and Spectrochimica Acta Part B Atomic Spectroscopy.

In The Last Decade

Keiichi Okai

58 papers receiving 388 citations

Peers

Keiichi Okai

FFTP

GPC

Yi Gao China

Paul E. DesJardin United States

Scott Stouffer United States

Shyam Menon United States

Fei Xing China

Somesh P. Roy United States

Neda Djordjevic Germany

Joshua E. Freeh United States

Scott Meyer United States

Donald J. Hautman United States

Yi Gao China

Keiichi Okai

375 ×1.6

99 ×0.5

170 ×1.3

FFTP

30 ×0.5

GPC

9 ×0.2

Citations per year, relative to Keiichi Okai Keiichi Okai (= 1×) peers Yi Gao

Countries citing papers authored by Keiichi Okai

Since Specialization

Citations

This map shows the geographic impact of Keiichi Okai's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Keiichi Okai with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Keiichi Okai more than expected).

Fields of papers citing papers by Keiichi Okai

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Keiichi Okai. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Keiichi Okai. The network helps show where Keiichi Okai may publish in the future.

Co-authorship network of co-authors of Keiichi Okai

This figure shows the co-authorship network connecting the top 25 collaborators of Keiichi Okai. A scholar is included among the top collaborators of Keiichi Okai based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Keiichi Okai. Keiichi Okai is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Terao, Yutaka, et al.. (2023). Electromagnetic analysis of fully superconducting motors employing dilute gas rotor and liquid hydrogen stator cooling structure. Journal of Physics Conference Series. 2545(1). 12027–12027. 5 indexed citations

Okai, Keiichi, et al.. (2023). Experimental and Analytical Evaluation on the Effects of the Boundary Layer Ingestion (BLI) Using a Simple Engine/Airframe Integration Model. 22(0). 11–19.

Terao, Yutaka, et al.. (2023). Thermal Characteristic Analysis of Fully Superconducting Motors Employing Dilute Gas Rotor Cooling Structure. Journal of Physics Conference Series. 2545(1). 12028–12028. 1 indexed citations

Okai, Keiichi, et al.. (2023). Evaluation of Emission during Simulated in-Flight Conditions Based on Experimental Data with an RQL Combustor Model. AIAA SCITECH 2023 Forum.

Terao, Yutaka, et al.. (2020). Electromagnetic Analysis of Fully Superconducting Synchronous Machines for Future Turbo Electric Propulsion Systems. AIAA Propulsion and Energy 2020 Forum. 4 indexed citations

Okai, Keiichi, et al.. (2014). Numerical Analysis of Large-Scale Tip-Driving Electric Motors for Thrust Fan. 2 indexed citations

Okai, Keiichi, et al.. (2012). Performance Analysis of a Fuel Cell Hybrid Aviation Propulsion System. 8 indexed citations

Sato, Tetsuya, Hideyuki Taguchi, Takayuki Kojima, et al.. (2008). Development Study of A Precooled Turbojet Engine for Flight Demonstration. 한국추진공학회 학술대회논문집. 109–114. 2 indexed citations

Okai, Keiichi, et al.. (2008). Experimental and Analytical Evaluation on the Potential of an Electromagnetic Driving Fan Concept. JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES. 56(650). 131–142.

10.

Taguchi, Hideyuki, Tetsuya Sato, Takayuki Kojima, et al.. (2008). Firing Test of Core Engine for Pre-cooled Turbojet Engine. 한국추진공학회 학술대회논문집. 115–121. 5 indexed citations

11.

Okai, Keiichi, et al.. (2006). Electromagnetic-Driving Fan for Aircraft-Propulsion Application. 6 indexed citations

12.

Tsue, Mitsuhiro, et al.. (2006). Spontaneous Ignition of Fuel Droplets in Lean Fuel-Air Mixtures. Journal of Propulsion and Power. 22(6). 1339–1348. 8 indexed citations

13.

Kojima, Takayuki, Hideyuki Taguchi, Keiichi Okai, Hiroaki Kobayashi, & Tetsuya Sato. (2005). Aerodynamic Performances of a Rectangular Variable Intake at Mach 5. JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES. 53(622). 532–540. 2 indexed citations

14.

Taguchi, Hideyuki, Takayuki Kojima, Kazuhisa Fujita, et al.. (2005). Design study and component tests on a subscale precooled turbojet engine for flight experiments. 26. 4592–4598. 1 indexed citations

15.

Taguchi, Hideyuki, Takayuki Kojima, Kazuhisa Fujita, et al.. (2005). Design Study and Component Tests on a Subscale Pre.... 56th International Astronautical Congress of the International Astronautical Federation, the International Academy of Astronautics, and the International Institute of Space Law. 1 indexed citations

16.

Okai, Keiichi, et al.. (2004). Summary of the engine system research using small jet engines in JAXA. 763–767. 3 indexed citations

17.

Kojima, Takashi, et al.. (2004). Experimental Study on a Rectangular Variable Intake for Space Planes. 한국추진공학회 학술대회논문집. 649–656. 5 indexed citations

18.

Araki, Mikiya, et al.. (2000). Effects of Spanwise Vortex Contortion on the Growth of Supersonic Double Shear Layer.. JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES. 48(556). 148–154. 2 indexed citations

19.

Okai, Keiichi, et al.. (1996). Overall Repairing a Salt-amaged Superstructure of Bridge:At the Tedorigawa River Bridge of the Hokuriku Expressway. Concrete Journal. 34(2). 33–42. 1 indexed citations

20.

Okai, Keiichi, et al.. (1996). Overall Repairing a Salt-amaged Superstructure of Bridge. Concrete Journal. 34(2). 33–42.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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