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http://hdl.handle.net/10397/79199
| Title: | Oscillations of leading-edge vortex breakdown locations over a delta wing | Authors: | Shen, L Wen, CY |
Issue Date: | Jun-2018 | Source: | AIAA journal, June 2018, v. 56, no. 6, p. 2113-2118 | Abstract: | This paper presents an experimental investigation of the oscillations of the leading-edge vortex breakdown locations over a slender delta wing with a 75 deg sweep angle. Here, a new mechanism is proposed, the vortex-secondary-flow interaction, responsible for the quasi-periodic antisymmetric interaction of the leading-edge vortex breakdown locations; the induced secondary flow in the symmetric plane continuously transfers the disturbance induced by the leading-edge vortex breakdown from one semispan to another, as well as the corresponding positive feedback. Therefore, the oscillations of the leading-edge vortex breakdown locations are synchronized in an opposite phase by the induced secondary flow. The experimental results are consistent with this interaction mechanism. Moreover, a new small-scale oscillation of the leading-edge vortex breakdown location is observed upon the application of an improved peak-valley-counting method. Its frequency is in the range of the helical mode instability. | Publisher: | American Institute of Aeronautics and Astronautics | Journal: | AIAA journal | ISSN: | 0001-1452 | EISSN: | 1533-385X | DOI: | 10.2514/1.J056565 | Rights: | Copyright © 2018 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved. This is the peer reviewed version of the following article: Shen, L., & Wen, C. Y. (2018). Oscillations of leading-edge vortex breakdown locations over a delta wing. AIAA Journal, 56(6), 2113-2118, which has been published in final form at https://doi.org/10.2514/1.J056565. |
| Appears in Collections: | Journal/Magazine Article |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| Shen_Oscillations_Leading-Edge_Vortex.pdf | Pre-Published version | 1.83 MB | Adobe PDF | View/Open |
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