Study of the Effect of Boundary Layer Ingestion (BLI) on Aircraft Propulsion / Distributed Propulsion Technology with Superconducting Motors

JAXA Supercomputer System Annual Report February 2024-January 2025

Report Number: R24EDA201P55

Subject Category: Aeronautical Technology

Responsible Representative: Atsushi Kanda, Aviation Technology Directorate, Aviation Environmental Sustainability Innovation Hub
Contact Information: Keiichi Okai, Aeronautical Technology Directorate, Aviation Environmental Sustainability Innovation Hub(okai.keiichi@jaxa.jp)
Members: Miyuki Aoki, Kakeru Ando, Junichi Kazawa, Kenta Kawano, Keiichi Okai

Abstract

This study focuses on the performance evaluation of an aircraft with boundary layer ingestion (BLI) which is expected to improve the fuel efficiency. The benefit of BLI was calculated by analyzing the flow under BLI conditions.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

The full scale aircraft analysis increases the computational scale.

Achievements of the Year

This study evaluates the power saving of the BLI aircraft. As a result, as shown in fig.1, approximately 20% of the required power can be reduced.

Fig.1: Relationship between Power (P_K) and net force exerted on the aircraft on the condition of cruise (speed and altitude) for a reference BWB aircraft model.

Publications

N/A

Usage of JSS

Computational Information

Process Parallelization Methods: MPI
Thread Parallelization Methods: N/A
Number of Processes: 960
Elapsed Time per Case: 13.8 Hour(s)

JSS3 Resources Used

Fraction of Usage in Total Resources*1(%): 0.60

Details

Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.

Computational Resources
System Name	CPU Resources Used (Core x Hours)	Fraction of Usage*2(%)
TOKI-SORA	12411215.10	0.57
TOKI-ST	58730.74	0.06
TOKI-GP	0.00	0.00
TOKI-XM	0.00	0.00
TOKI-LM	214712.78	15.49
TOKI-TST	0.00	0.00
TOKI-TGP	0.00	0.00
TOKI-TLM	0.00	0.00

File System Resources
File System Name	Storage Assigned (GiB)	Fraction of Usage*2(%)
/home	1607.33	1.08
/data and /data2	193954.07	0.93
/ssd	185.93	0.01

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	0.00	0.00

*1: Fraction of Usage in Total Resources: Weighted average of three resource types (Computing, File System, and Archiver).

*2: Fraction of Usage：Percentage of usage relative to each resource used in one year.

ISV Software Licenses Used

ISV Software Licenses Resources
	ISV Software Licenses Used (Hours)	Fraction of Usage*2(%)
ISV Software Licenses (Total)	9615.02	6.57

*2: Fraction of Usage：Percentage of usage relative to each resource used in one year.