The effects of roll motion of the floating platform on hydrodynamics performance of horizontal-axis tidal current turbine
The effects of roll motion of the floating platform on hydrodynamics performance of horizontal-axis tidal current turbine
复制标题
浮动平台横摇运动对水平轴潮流能发电机水动力性能的影响
DOI：
10.1007/s00773-016-0408-8
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发表时间：
2017-06
影响因子：
2.6
通讯作者：
Zhang Liang
中科院分区：
文献类型：
--
作者：
Wang Shu-qi;Sun Ke;Zhang Jian-hua;Zhang Liang
在实际海况条件下，浮式水轮机的水动力特性与波浪特性和浮体运动响应有关。最近，我们用CFD模拟的方法研究了恒定来流中涌浪运动对水平轴潮流水轮机的水动力性能和轴向阻尼系数的影响。新能源74：796-802,2015)。受此启发，本文采用滑动网格方法分析了水轮机受迫摇摆时均匀流中的水动力特性，研究了不同摇摆频率、摇摆幅值和叶尖速比对水轮机性能的影响。根据滚动水轮机的扭矩年历曲线，用最小二乘法可求出滚动阻尼系数和附加质量系数。结果表明，水轮机的轴向载荷、滚转力矩和能量利用率在横摇运动中会出现波动，横摇频率和横摇幅值越大，瞬时值的载荷和力矩波幅越大。峰值出现在滚动的平衡位置，而振动的幅度取决于滚动的角速度和水轮机的转速。滚动频率和幅值对减振系数影响不大，而涡轮机转速对减振系数有正影响。研究结果可为浮式潮流水轮机系统浮体运动响应的研究、结构设计和出力控制的校核提供数据。
Under the condition of actual sea state, hydrodynamic characteristics of floating horizontal-axis turbine are related to wave characteristics and floating carrier motion responses. We recently published the hydrodynamic performance and axial damping coefficient of the horizontal-axis tidal current turbine influenced by surge motion in constant inflow using CFD simulation (Zhang et al. Renew Energy 74:796–802, 2015). Encouraged by this result, this paper uses sliding mesh to analyze the hydrodynamic characteristics in uniform stream when the turbine is forced to roll and studies influences of different roll frequency, roll amplitude, and tip speed ratio on turbine’s performance. Roll-damping coefficient and added mass coefficient can be derived by torque almanacs curve of rolling turbine by the least square method. Results show that the turbine axial load, roll moment, and energy utilization ratio will fluctuate in roll motion; the more roll frequency and roll amplitude, and the more load and moment wave amplitude of momentary value. The crest value occurs in the balance position of rolling, while the amplitude of oscillation depends on the angular speed of rolling and rotating speed of the turbine. The frequency and amplitude of the roll have little impact on damping coefficient, but rotational speed of the turbine has positive impact on this coefficient. Results of this study can provide data to study motion response of floating carrier for floating tidal current turbine system and check the structural design and control of the electric output.
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影响因子：
8.7
作者：
P. W. Galloway;L. Myers;A. Bahaj
通讯作者：
P. W. Galloway;L. Myers;A. Bahaj
影响因子：
8.7
作者：
L. Luznik;K. Flack;E. Lust;Katharin C. Taylor
通讯作者：
L. Luznik;K. Flack;E. Lust;Katharin C. Taylor
影响因子：
8.7
作者：
Liang Zhang;Shu-qi Wang;Qi-hu Sheng;Feng-mei Jing;Yong Ma
通讯作者：
Liang Zhang;Shu-qi Wang;Qi-hu Sheng;Feng-mei Jing;Yong Ma
DOI：
--
发表时间：
2013
期刊：
--
影响因子：
--
作者：
Z. Lian
通讯作者：
Z. Lian
影响因子：
8.7
作者：
W. Batten;A. Bahaj;A. Molland;J. Chaplin
通讯作者：
W. Batten;A. Bahaj;A. Molland;J. Chaplin