Experimental investigation of flow induced motion and energy conversion for triangular prism
 作者： Nan Shao,  Jijian Lian,  Fang Liu,  Xiang Yan,  Peiyao Li 作者单位： 1State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, 135 Yaguan Road, Haihe Education Park, Tianjin, 30035, China2Power China Beijing Engineering Corporation Limited, 1 Dingfuzhuangwest Road, Chao Yang District, Beijing, 100024, China 刊名： Energy, 2020, Vol.194 来源数据库： Elsevier Journal DOI： 10.1016/j.energy.2019.116865 关键词： Flow induced motion;  Triangular prism;  Vortex induced vibration;  Galloping; 英文摘要： Abstract(#br)Previous studies proved that the triangular prism would go into galloping branch with high amplitude and low frequency. In order to evaluate the energy conversion capacity, a series experiments of flow induced motion (FIM) for triangular prism with physical springs are conducted in the Reynolds number range of 29,559 ≤ Re ≤ 119,376 by varying load resistance, stiffness, mass ratio and aspect ratio. Selective aspect ratios are applied to enhance the hydrokinetic energy captured by the generator. A physical model is used to control the change of load resistance and spring stiffness for a fast and precise oscillator modeling. The analysis of oscillation responses and energy conversion are carried out based on the statistical evaluation of displacement time-history and voltage... signals. The effects of system stiffness, mass ratio, aspect ratio and load resistance on the active power ( P harn ) of the triangular prism are presented and discussed. The main conclusions can be summarized as follows: (1) The best branch of the triangular prism energy conversion is galloping branch. (2) In the tests, the maximum active power P harn = 23.37 W and the corresponding efficiency η harn = 5.21%. The maximum energy conversion efficiency η harn = 6.17% with the corresponding active power P harn = 2.94 W. (3) With the increase of the stiffness ( K ) and the reduce of the mass ratio ( m *), the P harn rises up. (4) The higher aspect ratio ( α ) can be easier self-excited to galloping from the vortex induced vibration (VIV) but has a negative influence on the P harn of the galloping branch.

• motion　运动
• triangular　三角形的
• investigation　研究
• prism　棱镜
• induced　感应的
• energy　能量
• conversion　转换