%0 Journal Article
%T Influence of attack angle on vortex
%A Li Zhang
%A Lin Ding
%A Xinru Mao
%J Advances in Mechanical Engineering
%@ 1687-8140
%D 2019
%R 10.1177/1687814018822598
%X 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¨CStokes simulations. The Reynolds number ranges from 1000 to 10,000, and the attack angle of free flow is varied from 0¡ã to 90¡ã. Results indicate that the vortex-induced vibration responses with attack angle range of 0¡ã¡Ü£¿¦Á£¿¡Ü£¿30¡ã 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£¿¡Ü£¿Re£¿¡Ü£¿7000 and 0¡ã¡Ü£¿¦Á£¿¡Ü£¿30¡ã
%K Vortex-induced vibration
%K energy harvesting
%K two cylinders
%K side-by-side arrangement
%K attack angle
%U https://journals.sagepub.com/doi/full/10.1177/1687814018822598