Application of the Cartesian grid and an IB method to the analysis of aircraft engine comustors

JAXA Supercomputer System Annual Report February 2024-January 2025

Report Number: R24EDA102G31

Subject Category: Aeronautical Technology

Responsible Representative: Taisuke Nambu, Aviation Technology Directorate, Aircraft Digital Transformation Technology Demonstration Project Team (XANADU)
Contact Information: Taisuke Nambu(nambu.taisuke@jaxa.jp)
Members: Dan Hori, Taisuke Nambu, Kei Shimura

Abstract

The evaluation of key factors in thermal-fluid phenomena of aero-engine combustors and fundamental characteristics as a fluid solver is conducted using HINOCA-AE, the potential for expanding the application of numerical analysis to combustor design is explored in collaboration between JAXA and IHI.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

Massive-parallel large scale simulation, Large number of simulations for software validation

Achievements of the Year

Combustion analysis for a realistic combustor using a solver employing orthogonal grids and the Immersed Boundary (IB) method was performed. Total temperature non-uniformity at the combustor exit was captured; the total temperature tended to be higher and RTDF (Radial Temperature Distortion Factor) also showed a peak at mid span. Investigation of the differences in the radial distribution of total temperature between the present results and experiments remains future studies. The flow analysis past a cylinder was also performed and the fundamental characteristics as a solver were investigated. Improving mesh resolution for increasing AMR (Adaptive Mesh Refinement) level high brings the wake depth at x/D = 1 closer to the experiments.

Reference of experiment: Cantwell, B., and Coles, D., "An Experimental Study of Entrainment and Transport in the Turbulent Near Wake of a Circular Cylinder", J. Fluid Mech., 136-1, pp. 321-374 (1983).

Fig.1: Total temperature distribution at combustor exit

Fig.2: Radial Temperature Distortion Factor (RTDF) at combustor exit

Fig.3: Mean streamwise velocity in the vicinity of wake (X/D=1)

Fig.4: Mean streamwise velocity in the vicinity of wake (X/D=3)

Publications

N/A

Usage of JSS

Computational Information

Process Parallelization Methods: MPI
Thread Parallelization Methods: OpenMP
Number of Processes: 1 - 14400
Elapsed Time per Case: 610 Hour(s)

JSS3 Resources Used

Fraction of Usage in Total Resources*1(%): 1.43

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	37659655.24	1.72
TOKI-ST	211878.69	0.22
TOKI-GP	0.00	0.00
TOKI-XM	0.00	0.00
TOKI-LM	40432.02	2.92
TOKI-TST	0.90	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	1545.22	1.04
/data and /data2	138337.78	0.66
/ssd	36018.89	1.93

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	1.80	0.01

*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)	286.24	0.20

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