Abstract
Crossflow instability (CFI) is a critical factor contributing to the early transition of the boundary layer on highly swept wings. This paper investigates the influence of base flow characteristics on CFI in swept boundary layers, with a specific focus on the maximum crossflow velocity and the crossflow shape factor. Using linear stability theory, the development of stationary crossflow disturbances is analyzed. The results indicate that the maximum crossflow velocity linearly scales the nondimensional amplification rate in the unstable region of these disturbances. Additionally, variations in the crossflow shape factor impact the range of unstable wavenumbers and the critical Reynolds number. These findings are expected to provide valuable insights into developing strategies to mitigate crossflow instability.
| Original language | English |
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| Journal | ICAS Proceedings |
| State | Published - 2024 |
| Event | 34th Congress of the International Council of the Aeronautical Sciences, ICAS 2024 - Florence, Italy Duration: 9 Sep 2024 → 13 Sep 2024 |
Keywords
- base flow
- crossflow instability
- linear stability theory
- natural laminar flow