摘要
针对流致振动能量转换系统中硬驰振分支能量利用受限问题,提出一种新型圆-三角-附板组合截面振子。改装现有流致振动能量转换装置,引入扭矩传感器获取流体力,进行不同励磁电压下的流致振动与发电试验,评估振幅、频率、升力、功率和效率等参数。该研究旨在为提高流致振动能量转换系统的实际发电潜能和扩大其适用范围提供新思路。结果表明:在涡激振动区间,随着流速增大,圆-三角-附板振子可捕获更多的流体能量;随着阻尼增大,圆-三角-附板振子振动响应由软驰振模式过渡到硬驰振模式;圆-三角-附板振子的最佳能量转换分支为驰振分支,其最大振幅比为2.43,对应励磁电压为3 V,折合流速为12.38;最优发电功率为24.72 W,效率为25.46%,对应励磁电压为99 V,折合流速为12.38,与三棱柱振子相比,其可一定程度提高能量转换能力。
Aimed at the issue of the flow-induced motion energy conversion system(FIMECS)-limited utilization of the energy in hard galloping branches,a new type of oscillator with a circular-triangleattachment(Cir-Tri-Att)combined section is developed.The existing FIMECS is refitted and equipped with a torque sensor to capture fluid forces,and experimental tests are conducted on this oscillator under different excitation voltages,focusing on its flow-induced vibration and power generation capacity.Its amplitude,frequency,lift,active power,and energy conversion efficiency are discussed and analyzed.This study aims to work out a new idea for improving the power generation of the real energy conversion system and to broaden its application scope.In the vortex-induced vibration range,the oscillator captures more flow energy in the case of larger flow velocity;its vibration response shifts from soft galloping to hard galloping as its damping increases;its best branch energy conversion is in the galloping branch.In our test range,its maximum amplitude ratio is 2.43 at an excitation voltage of 3 V and a reduced velocity of 12.4.And it features a peak active power of Pharn=24.7 W and a peak efficiency ofηharn=25.5%,corresponding to the excitation voltage of 99 V and reduced velocity of 12.4.Compared with the triangular prism,its energy converting capability improves to a certain extent.
作者
冉聃颉
练继建
邵楠
燕翔
刘昉
杨旭
RAN Danjie;LIAN Jijian;SHAO Nan;YAN Xiang;LIU Fang;YANG Xu(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300072,China;School of Water Conservancy and Hydroelectric Power,Hebei University of Engineering,Handan 056038,China)
出处
《水力发电学报》
CSCD
北大核心
2022年第11期86-95,共10页
Journal of Hydroelectric Engineering
基金
国家自然科学基金(51909190)
中国博士后科学基金资助项目(2019M661020)。
关键词
流致振动
驰振
组合截面振子
发电功率
效率
flow-induced motion
galloping
composite section cylinder
active power
efficiency
