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Serration of the du...
Serration of the duct trailing edge to affect the hydrodynamics and noise generation for a pump-jet propulsor
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- Yang, Chun (författare)
- Harbin Engineering University
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- Sun, Cong (författare)
- Harbin Engineering University
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- Wang, Chao (författare)
- Harbin Engineering University
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- Yao, Huadong, 1982 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Guo, Chunyu (författare)
- Harbin Engineering University
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- Yue, Qihui (författare)
- Harbin Engineering University
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(creator_code:org_t)
- 2024
- 2024
- Engelska.
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Ingår i: Physics of Fluids. - 1089-7666 .- 1070-6631. ; 36
- Relaterad länk:
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- Inspired by the silent gliding feather of owl wings, the trailing edge of the duct of a pump-jet propulsor was designed with a similar serrated structure in order to reduce noise generation. Two distinct serrated structures were proposed and evaluated using the detached eddy simulation method with the shear stress transport k-omega turbulence model. The findings indicated that while the hydrodynamic efficiency changed within 1% upon the inclusion of the serrated trailing edge, a significant alteration existed in vortex structures of the wake. More horseshoe and secondary vortices were generated since large-scale vortices induced by the duct were disrupted circumferentially. This phenomenon expedited the distortion and mixing of trailing-edge vortices, causing flow instability. Furthermore, the serrated trailing-edge structure led to noise reduction. Particularly in the 0–1000 Hz range, the sound pressure level behind the duct showed a maximum reduction of 4.43 dB.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Rymd- och flygteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Aerospace Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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