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Estimation of a Propeller Performance

JAXA Supercomputer System Annual Report February 2022-January 2023

Report Number: R22EDA201D01

Subject Category: Aeronautical Technology

PDF available here

  • Responsible Representative: Masashi Harada, AviationTechnology Directorate, Aviation Safety Innovation Hub
  • Contact Information: Masashi Harada(harada.masashi@jaxa.jp)
  • Members: Hirokazu Higashida, Masashi Harada, Junichi Kazawa, Hideji Saiki

Abstract

Development of Propeller and Ducted Fan Design Tools to Maximize the Static Thrust

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

Verification of propeller performance designed with a propeller design tool that maximizes the static thrust. Calculation of detailed velocity distribution of the propeller wake for use in tool refinement.

Achievements of the Year

The performance of a propeller optimally designed with OptRotor, a propeller design program that maximizes static thrust, the position and shape of the blade tip vortices, and the distribution of thrust on the blades were calculated using CFD. The movement of the blade tip vortex is shown in (Fig. 1). As observed in the experiment, the blade tip vortex moves radially inward immediately after its formation. This causes the spiral vortex formed by the wing tip vortices to contract. Downward induced velocity develops inside the spiral vortex, but no downward induced velocity develops outside the spiral vortex. This situation is shown in (Fig. 2). The optimum design of the propeller blade by OptRotor has a bulge at the tip of the propeller, which actively generates lift at the tip where the downward induced velocity is small. The radial thrust distribution (Fig. 3) shows that the most thrust is generated near the tip (200 mm). On the other hand, the distribution of absorbed power in the radial direction (Fig. 4) shows that there is a region of reduced absorbed power near the tip (200 mm), indicating that the propeller tip bulge obtained with the OptRotor is highly efficient in generating thrust where absorbed power is small, thus demonstrating the validity of the OptRotor design.

Fig.1(video): The movement of the blade tip vortex

Annual Reoprt Figures for 2022

Fig.2: Axial velocity distribution

 

Annual Reoprt Figures for 2022

Fig.3: Distribution of thrust in radial direction

 

Annual Reoprt Figures for 2022

Fig.4: Distribution of absorbed power in radial direction

 

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: 636.3 Hour(s)

JSS3 Resources Used

 

Fraction of Usage in Total Resources*1(%): 0.03

 

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 807721.20 0.04
TOKI-ST 795.54 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 13.70 0.01
/data and /data2 16547.78 0.13
/ssd 289.63 0.04

 

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 2022-January 2023