Effect of aspect ratio of elliptical inlet shape on performance of subsonic diffusing S-duct
- Authors
- Lee, Jihyeong; Cho, Jinsoo
- Issue Date
- Mar-2018
- Publisher
- KOREAN SOC MECHANICAL ENGINEERS
- Keywords
- Aspect ratio; CFD analysis; Counter-rotating vortex; Distortion coefficient; Flow characteristics; Inlet shape; S-duct
- Citation
- JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, v.32, no.3, pp.1153 - 1160
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
- Volume
- 32
- Number
- 3
- Start Page
- 1153
- End Page
- 1160
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/17732
- DOI
- 10.1007/s12206-018-0218-5
- ISSN
- 1738-494X
- Abstract
- The aerodynamic characteristics of S-ducts with various inlet shapes were analyzed using a commercial computational fluid dynamics tool. This study aimed to investigate the influence of the aspect ratio of inlet geometry for an RAE M 2129 S-duct. The computational results were validated using experimental data from the Aircraft Research Association. The performance of the S-duct was influenced by the location of the counter-rotating vortex on the engine face. When the center of the vortex was near the starboard side, the performance was poor. By contrast, performance increased as the counter-rotating vortex moved away from the starboard side. The center of the counter-rotating vortex of the upper half semicircular S-duct was far from the starboard side, whereas that of the lower half semicircular S-duct was near the starboard side. In conclusion, S-ducts with upper half semicircular shape had better performance than those with other inlet shapes. The AR(0.75,0) case delivered the best performance, whereas the AR(1,1) case exhibited the worst.
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