Influence of attack angle on vortex-induced vibration and energy harvesting of two cylinders in side-by-side arrangement. (January 2019)

• Record Type: Journal Article
• Authors: Zhang, Li; Mao, Xinru; Ding, Lin
• Is Part Of: Advances in mechanical engineering. Volume 11:Number 1(2019)
• Publication Date: 2019-01
• Subjects: Vortex-induced vibration -- energy harvesting -- two cylinders -- side-by-side arrangement -- attack angle; Mechanical engineering -- Periodicals; 621.05
• DOI: 10.1177/1687814018822598
• Languages: English
• ISSNs: 1687-8132

Abstract

The vortex-induced vibration and energy harvesting of two cylinders in side-by-side arrangement with different attack angles are numerically investigated using two-dimensional unsteady Reynolds-Averaged Navier–Stokes simulations. The Reynolds number ranges from 1000 to 10, 000, and the attack angle of free flow is varied from 0° to 90°. Results indicate that the vortex-induced vibration responses with attack angle range of 0°≤ α ≤ 30° are stronger than other attack angle cases. The parallel vortex streets are clearly observed with synchronized vortex shedding. Relatively large attack angle leads to a phase difference between the wake patterns of the two cylinders. Hydrokinetic energy can be obviously harvested when Re > 4000. Compared with the larger attack angle case, the two side-by-side cylinders with smaller attack angle have better performance on energy conversion. The maximum energy conversion efficiency of 21.7% is achieved. The optimum region for energy conversion is 5000 ≤ Re ≤ 7000 and 0°≤ α ≤ 30°.