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Aerodynamics of Re-entry Capsule with Hyperbolic Contours

JAXA Supercomputer System Annual Report February 2023-January 2024

Report Number: R23EACA56

Subject Category: JSS Inter-University Research

PDF available here

  • Responsible Representative: Hirotaka Otsu, Professor, Ryukoku University
  • Contact Information: Hirotaka Otsu, Professor, Ryukoku University(otsu@rins.ryukoku.ac.jp)
  • Members: Hirotaka Otsu

Abstract

For deleveopment of future sample return capsule, we applied the hyperbolic contours to design the front shape of the capsue. To find the optimal shape of the capsule, we perfomed CFD analyses.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

There have been many shapes depending on the parameter for hyperbolic curves with various flight conditions such as Mach number and AoA.

Achievements of the Year

In this fiscal year, aerodynamic characteristics of a hyperbolic re-entry capsule in the transonic region were investigated by wind tunnel experiments and numerical fluid dynamics analysis. The JSS version of FaSTAR was used for the analysis, and HexaGrid v1.2.1 was used for grid generation. In the transonic region, the shock wave formed in front of the capsule becomes bow-shaped and is strongly reflected in the flow path in the wind tunnel. In order to reproduce this phenomenon, a dense computational grid was created over almost the entire computational domain, and an analysis was performed taking into account reflections at the walls. As a result, it was possible to qualitatively reproduce the shock wave formed in the front and the shock wave reflected in the flow path in the wind tunnel.

Annual Reoprt Figures for 2023

Fig.1: Comparison of shock wave shapes around the capsule in the transonic region

 

Annual Reoprt Figures for 2023

Fig.2: CFD Reproduction of Shock Wave Shapes around a Capsule in a Transonic Wind Tunnel Experiment

 

Publications

– Oral Presentations

“Fabrication of experimental wind tunnel model using 3D printer and its application to transonic wind tunnel experiments,” ISAS2023-SFMA-023

Usage of JSS

Computational Information

  • Process Parallelization Methods: MPI
  • Thread Parallelization Methods: N/A
  • Number of Processes: 64 – 192
  • Elapsed Time per Case: 60 Minute(s)

JSS3 Resources Used

 

Fraction of Usage in Total Resources*1(%): 0.00

 

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 345.44 0.00
TOKI-ST 40.35 0.00
TOKI-GP 0.00 0.00
TOKI-XM 0.00 0.00
TOKI-LM 0.00 0.00
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 0.00 0.00
/data and /data2 0.00 0.00
/ssd 0.00 0.00

 

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)
0.00 0.00

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

JAXA Supercomputer System Annual Report February 2023-January 2024