| Autor: |
Braun, J., Rahbari, I., Paniagua, G., Addo, P. Aye, Garicano-Mena, J., Valero, E, Clainche, S. Le |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
Experimental Thermal and Fluid Science, Volume 150, 1 January 2024 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1016/j.expthermflusci.2023.111021 |
| Popis: |
A canonical wavy surface exposed to a Mach 2 flow is investigated through high-frequency Pressure Sensitive Paint (PSP), Kulite measurements, and shadowgraph imaging. The wavy surface features a compression and expansion region, two shock-boundary layer interactions, and two shock-separation regions. The unsteady characteristics of the wall pressure and shock angles are presented, demonstrating an increase in amplitude of the instabilities when traveling through the shock systems. Three-dimensional flow features, observed in PSP data, reveal a two-dimensional flow pattern. Higher-Order Dynamic Mode Decomposition and Spectral Proper Orthogonal Decomposition are implemented to dissect the different flow features, revealing several dominant low-frequency and medium-frequency phenomena. The separation region appears at frequencies with Strouhal numbers between 0.01 and 0.2, confirmed by the frequency content in the local pressure measurement using Kulites. |
| Databáze: |
arXiv |
| Externí odkaz: |
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