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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2405.02886 |
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| _version_ | 1866929335646027776 |
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| author | Qian, Zhaohui Ye, Weixiang Zeng, Yongshun Peng, Xiaoxing Luo, Xianwu |
| author_facet | Qian, Zhaohui Ye, Weixiang Zeng, Yongshun Peng, Xiaoxing Luo, Xianwu |
| contents | The discrete tone radiated from a cavitating tip vortex, known as "vortex singing", was first recognized in 1989, but its sound generation mechanism has remained a mystery for over thirty years. In this letter, by means of the correction for the cavitation bubble dynamics and the dispersion relation of cavity interfacial waves, we found that after the far-end disturbances propagate upstream, the whistling vortex should be triggered by near-end sound sources, the breathing mode waves. Further utilizing the theoretical solutions for singing lines and the potential singing cavitation number with frequency, we accurately identified all available tests for seeking the vortex singing over the past three decades, answering a long-standing perplexity: why such a best whistler is able to appear only within a narrow range of the cavitation number. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_02886 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The best whistler: a cavitating tip vortex Qian, Zhaohui Ye, Weixiang Zeng, Yongshun Peng, Xiaoxing Luo, Xianwu Fluid Dynamics Atmospheric and Oceanic Physics The discrete tone radiated from a cavitating tip vortex, known as "vortex singing", was first recognized in 1989, but its sound generation mechanism has remained a mystery for over thirty years. In this letter, by means of the correction for the cavitation bubble dynamics and the dispersion relation of cavity interfacial waves, we found that after the far-end disturbances propagate upstream, the whistling vortex should be triggered by near-end sound sources, the breathing mode waves. Further utilizing the theoretical solutions for singing lines and the potential singing cavitation number with frequency, we accurately identified all available tests for seeking the vortex singing over the past three decades, answering a long-standing perplexity: why such a best whistler is able to appear only within a narrow range of the cavitation number. |
| title | The best whistler: a cavitating tip vortex |
| topic | Fluid Dynamics Atmospheric and Oceanic Physics |
| url | https://arxiv.org/abs/2405.02886 |