Modeling and Numerical Simulation of a Buoyancy Controlled Ocean Current Turbine
Modeling and Numerical Simulation of a Buoyancy Controlled Ocean Current Turbine
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DOI：
10.36688/imej.4.47-58
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发表时间：
2021
影响因子：
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通讯作者：
Arezoo Hasankhani;James H. VanZwieten;Yu-Shuang Tang;Brock Dunlap;Alexandra De Luera;C. Sultan;N. Xiros
中科院分区：
文献类型：
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作者：
Arezoo Hasankhani;James H. VanZwieten;Yu-Shuang Tang;Brock Dunlap;Alexandra De Luera;C. Sultan;N. Xiros
全球可再生能源需求的增加和洋流的高能量密度推动了洋流涡轮机（OCT）的发展。这些柔性系泊系统将使用可变浮力、提升表面、海底绞盘和/或水面浮标来保持期望的近水面操作深度。本文介绍了700 kW变浮力控制OCT的完整数值模拟，包括详细的涡轮机系统、入流、致动器（即，发电机和可变浮力）、传感器和故障模型。OCT性能的模拟预测正常，飓风，和故障的情况下。结果表明，对于1.0 - 2.5 m/s之间的所有均匀流速，该OCT可在38 m至329 m的深度之间运行。故障场景表明，转子制动导致快速垂直OCT系统同意，叶片变桨故障在频域中产生明显的功率波动。最后，模拟OCT操作在测量的洋流（即，正常和飓风条件）量化典型和极端条件下的功率统计和系统行为。
Increased global renewable power demands and the high energy density of ocean currents have motivated the development of ocean current turbines (OCTs). These compliantly mooring systems will maintain desired near-surface operating depths using variable buoyancy, lifting surface, sub-sea winches, and/or surface buoys. This paper presents a complete numerical simulation of a 700 kW variable buoyancy controlled OCT that includes detailed turbine system, inflow, actuator (i.e., generator and variable buoyancy), sensor, and fault models. Simulation predictions of OCT performance are made for normal, hurricane, and fault scenarios. Results suggest this OCT can operate between depths of 38 m to 329 m for all homogeneous flow speeds between 1.0-2.5 m/s. Fault scenarios show that rotor braking results in a rapid vertical OCT system assent and that blade pitch faults create power fluctuations apparent in the frequency domain. Finally, simulated OCT operations in measured ocean currents (i.e., normal and hurricane conditions) quantify power statistics and system behavior typical and extreme conditions.