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Effect of aspect ratio of elliptical inlet shape on performance of subsonic diffusing S-duct
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Effect of aspect ratio of elliptical inlet shape on performance of subsonic diffusing S-duct
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Journal Article
Effect of aspect ratio of elliptical inlet shape on performance of subsonic diffusing S-duct
2018
Overview
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 Sduct 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.
Publisher
Korean Society of Mechanical Engineers,Springer Nature B.V,대한기계학회
Subject
