Academic Journal
Modification of a turbulent boundary layer by circular cavities
| العنوان: | Modification of a turbulent boundary layer by circular cavities |
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| المؤلفون: | Scarano, Francesco, Jacob, Marc, Gojon, Romain, Carbonneau, Xavier, Gowree, Erwin Ricky |
| المساهمون: | Département Aérodynamique Energétique et Propulsion (DAEP), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), Laboratoire de Mecanique des Fluides et d'Acoustique (LMFA), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | ISSN: 1070-6631. |
| بيانات النشر: | HAL CCSD American Institute of Physics |
| سنة النشر: | 2022 |
| المجموعة: | Université de Lyon: HAL |
| مصطلحات موضوعية: | Skin friction drag, Cavities, Turbulence, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] |
| الوصف: | International audience ; It is shown how well-chosen perforations in a wall flow can locally reduce skin friction drag by modifying the generation of bursts in the boundary layer. For this purpose, a detailed hot wire boundary layer experimental investigation of the flow past a perforated plate, complemented with large eddy simulations, is carried out and compared to the smooth case. The perforated plate is obtained with an array of flush-mounted circular cavities. These cavities are disposed in a periodic staggered arrangement. For the three tested flow velocities, the momentum thickness based Reynolds number varies from Re0 =1830 to 3380 and the cavity diameter and spacing in wall units respectively from d+ = 130 to 250 and L+ 20 = 587 to 1075, the latter being identical in both spanwise and streamwise directions. The mean velocity profiles evidence a thickening of the viscous sublayer and a decrease of the friction velocity as compared to the smooth wall case. The application of the Variable Interval Time Averaging (VITA) technique highlights an upward shift of the bursts from the wall and an attenuation of the average burst intensity and duration. Spanwise measurements evidence an overall bursts attenuation despite the lack of spanwise uniformity. The three dimensional (3D) mean flow topology arising from the large eddy simulations provides evidences |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | OATAO: 29068 |
| DOI: | 10.1063/5.0091110 |
| الاتاحة: | https://hal.science/hal-03722734 https://hal.science/hal-03722734v1/document https://hal.science/hal-03722734v1/file/Scarano_29068.pdf https://doi.org/10.1063/5.0091110 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.6EB79E78 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1063/5.0091110 |
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