H. Hiroyasu

2.7k total citations · 2 hit papers
30 papers, 2.1k citations indexed

About

H. Hiroyasu is a scholar working on Fluid Flow and Transfer Processes, Computational Mechanics and Automotive Engineering. According to data from OpenAlex, H. Hiroyasu has authored 30 papers receiving a total of 2.1k indexed citations (citations by other indexed papers that have themselves been cited), including 22 papers in Fluid Flow and Transfer Processes, 14 papers in Computational Mechanics and 12 papers in Automotive Engineering. Recurrent topics in H. Hiroyasu's work include Advanced Combustion Engine Technologies (22 papers), Vehicle emissions and performance (11 papers) and Combustion and flame dynamics (11 papers). H. Hiroyasu is often cited by papers focused on Advanced Combustion Engine Technologies (22 papers), Vehicle emissions and performance (11 papers) and Combustion and flame dynamics (11 papers). H. Hiroyasu collaborates with scholars based in Japan and United States. H. Hiroyasu's co-authors include Masataka ARAI, Tomohiro Kadota, M. Shimizu, Michihiko Tabata, Kenji Nakanishi, Haiyan Miao, Kazuhiko Nishida, Tie Li, Sangil Kwon and Akira Murakami and has published in prestigious journals such as Combustion and Flame, SAE technical papers on CD-ROM/SAE technical paper series and International Journal of Engine Research.

In The Last Decade

H. Hiroyasu

26 papers receiving 1.9k citations

Hit Papers

Structures of Fuel Sprays in Diesel Engines 1976 2026 1992 2009 1990 1976 100 200 300 400 500
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Structures of Fuel Sprays in Diesel Engines
    1990 541 citations H. Hiroyasu, Masataka ARAI SAE technical papers on CD-ROM/SAE technical paper series profile →
  2. Models for Combustion and Formation of Nitric Oxide and Soot in Direct Injection Diesel Engines
    1976 473 citations H. Hiroyasu et al. SAE technical papers on CD-ROM/SAE technical paper series profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
H. Hiroyasu Japan 16 1.8k 1.3k 766 736 282 30 2.1k
C. J. Rutland United States 22 2.0k 1.1× 2.2k 1.7× 524 0.7× 496 0.7× 277 1.0× 38 2.8k
Ulrich Spicher Germany 23 1.7k 1.0× 1.2k 0.9× 843 1.1× 506 0.7× 240 0.9× 163 2.1k
Gary L. Borman United States 19 1.3k 0.7× 1.0k 0.8× 572 0.7× 532 0.7× 195 0.7× 53 1.8k
J. Javier López Spain 24 1.4k 0.8× 830 0.6× 670 0.9× 444 0.6× 301 1.1× 73 1.6k
Gianluca D’Errico Italy 29 2.3k 1.3× 2.0k 1.6× 627 0.8× 528 0.7× 362 1.3× 141 2.6k
Ossi Kaario Finland 29 2.0k 1.2× 1.9k 1.5× 527 0.7× 519 0.7× 355 1.3× 159 2.7k
Tommaso Lucchini Italy 28 2.3k 1.3× 2.0k 1.6× 501 0.7× 593 0.8× 401 1.4× 152 2.6k
Kang Y. Huh South Korea 25 1.3k 0.7× 1.6k 1.2× 159 0.2× 390 0.5× 139 0.5× 109 2.0k
Gian Marco Bianchi Italy 22 1.1k 0.6× 899 0.7× 423 0.6× 319 0.4× 125 0.4× 122 1.4k
F. Payri Spain 32 2.3k 1.3× 1.5k 1.1× 1.3k 1.7× 875 1.2× 342 1.2× 90 3.1k

Countries citing papers authored by H. Hiroyasu

Since Specialization
Citations

This map shows the geographic impact of H. Hiroyasu'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 H. Hiroyasu with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites H. Hiroyasu more than expected).

Fields of papers citing papers by H. Hiroyasu

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by H. Hiroyasu. 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 H. Hiroyasu. The network helps show where H. Hiroyasu may publish in the future.

Co-authorship network of co-authors of H. Hiroyasu

This figure shows the co-authorship network connecting the top 25 collaborators of H. Hiroyasu. A scholar is included among the top collaborators of H. Hiroyasu 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 H. Hiroyasu. H. Hiroyasu is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Nishida, Keiya, et al.. (2023). Characterization of Cavitation Flow in a Simple Hole Nozzle. 207–214.
2.
Nishida, Keiya, et al.. (2023). Characteristics of the Internal Flow in a Diesel Injection Nozzle. 175–182.
3.
Li, Tie, et al.. (2007). Effect of split injection on stratified charge formation of direct injection spark ignition engines. International Journal of Engine Research. 8(2). 205–219. 29 indexed citations
4.
Hiroyasu, H., et al.. (2004). Reduction of Heavy Duty Diesel Engine Emission and Fuel Economy with Multi-Objective Genetic Algorithm and Phenomenological Model. SAE technical papers on CD-ROM/SAE technical paper series. 1. 44 indexed citations
5.
Hiroyasu, H., et al.. (2003). Genetic Algorithms Optimization of Diesel Engine Emissions and Fuel Efficiency with Air Swirl, EGR,Injection Timing and Multiple Injections. SAE technical papers on CD-ROM/SAE technical paper series. 1. 38 indexed citations
6.
Hiroyasu, H., et al.. (2002). Multi-Objective Optimization of Diesel Engine Emissions and Fuel Economy using Genetic Algorithms and Phenomenological Model. SAE technical papers on CD-ROM/SAE technical paper series. 1. 55 indexed citations
7.
Hiroyasu, H. & Masataka ARAI. (1990). Structures of Fuel Sprays in Diesel Engines. SAE technical papers on CD-ROM/SAE technical paper series. 1. 541 indexed citations breakdown →
8.
Kwon, Sangil, Masataka ARAI, & H. Hiroyasu. (1989). Effects of Cylinder Temperature and Pressure on Ignition Delay in Direct Injection Diesel Engine. JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN. 24(1). 26–36. 12 indexed citations
9.
Hiroyasu, H.. (1985). Diesel Engine Combustion and Its Modeling. Medical Entomology and Zoology. 53–75. 48 indexed citations
10.
Hiroyasu, H., Masataka ARAI, & Michihiko Tabata. (1985). Diesel Fuel Spray of High Viscosity Fuel. JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN. 20(3). 194–202. 2 indexed citations
11.
Nishida, Keiya, Akira Murakami, & H. Hiroyasu. (1985). Measurements of swirling flow in a direct injection diesel engine under motored and fired conditions. Symposium (International) on Combustion. 20(1). 201–208. 5 indexed citations
12.
Hiroyasu, H., et al.. (1984). Flow characterization with and without combustion in a swirl type combustor. 1. 221–227.
13.
Kadota, Tomohiro & H. Hiroyasu. (1984). Soot concentration measurement in a fuel droplet flame via laser light scattering. Combustion and Flame. 55(2). 195–201. 23 indexed citations
14.
Nishida, Kazuhiko, et al.. (1984). An Analysis of Swirling Flow in Cylinder for Predicting D.I. Diesel Engine Performance. SAE technical papers on CD-ROM/SAE technical paper series. 1. 6 indexed citations
15.
ARAI, Masataka, et al.. (1982). Effect of fuel volatility on spray combustion. Symposium (International) on Combustion. 19(1). 511–518. 2 indexed citations
16.
Kadota, Tomohiro & H. Hiroyasu. (1981). Combustion of a fuel droplet in supercritical gaseous environments. Symposium (International) on Combustion. 18(1). 275–282. 25 indexed citations
17.
Hiroyasu, H., et al.. (1976). Models for Combustion and Formation of Nitric Oxide and Soot in Direct Injection Diesel Engines. SAE technical papers on CD-ROM/SAE technical paper series. 1. 473 indexed citations breakdown →
18.
Hiroyasu, H., et al.. (1975). Computer simulation for combustion and exhaust emissions in spark ignition engine. Symposium (International) on Combustion. 15(1). 1213–1223. 15 indexed citations
19.
Hiroyasu, H., et al.. (1974). Fuel Droplet Size Distribution in Diesel Combustion Chamber. SAE technical papers on CD-ROM/SAE technical paper series. 1. 178 indexed citations
20.
Hiroyasu, H.. (1967). Mathematical expression for drop size distribution in sprays. NASA Technical Reports Server (NASA). 4 indexed citations

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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