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Communication Dans Un Congrès Année : 2023

Temporal development of NACA airfoil wake affected by an upstream wake

Résumé

The study aims to uncover the consequence of the wake behind an obstacle by passing another object placed downstream. This issue pertains to wind turbine parks. A simple example is the interaction of a wake behind a cylinder and a blade placed downstream. The wake comprises coherent motions (CM) and random motion (RM). Coherent structures, reminiscent of the Von Kàrmàn street, are created by the obstacle and interact with random motion (RM), thus inducing locally enhanced turbulent cascade and impacted by any possible obstacle in the wake. 2C-2D in-plane velocity fields (190k images) are measured behind the obstacles (Cylinder-Blade) by high-speed Particle Image Velocimetry (H-PIV) to visualize the temporal development. Then, the lock phases numerical method is developed for further statistical studies. The measurement plane is at the center of the test section, with three different local Reynolds numbers based on the cylinder diameter, i.e., Re = 2000, 4000, and 8000.

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Dates et versions

hal-04294974 , version 1 (20-11-2023)

Identifiants

  • HAL Id : hal-04294974 , version 1

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Majd Armaly, E Varea, C Lacour, Luminita Danaila, B Lecordier. Temporal development of NACA airfoil wake affected by an upstream wake. 15th International Symposium on Particle Image Velocimetry – ISPIV 2023, Jun 2023, San Diego, United States. ⟨hal-04294974⟩
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