线性波作用下水平轴潮流能水轮机水动力性能的数值模拟

发布时间：2018-10-25 08:43

【摘要】：文章以20 kW水平轴潮流能水轮机为例,分别选取正常工况和极限工况下的波浪参数,运用计算流体动力学软件Fluent对线性波作用下的水平轴潮流能水轮机的水动力性能进行了数值模拟。数值模拟结果表明:水平轴潮流能水轮机在波浪作用下会受到交变的海洋环境载荷的作用,在该环境载荷的作用下,水轮机的各项水动力性能参数发生周期性变化;正常工况下,水轮机水动力性能参数的波动幅度为3%左右,波浪对水轮机的影响不大;极限工况下,水轮机水动力性能参数的波动幅度为35%左右,波浪对水轮机的影响很大。波浪对水轮机的影响不容小觑,对此,工程上应尽量避开波浪影响区或采取适当的措施提高水平轴潮流能水轮机叶片和支撑结构的疲劳强度,以减小波浪对水平轴潮流能水轮机性能的影响和破坏。
[Abstract]:Taking a 20 kW horizontal axis tidal current turbine as an example, the wave parameters under normal and limiting conditions are selected, respectively. The hydrodynamic performance of horizontal axis tidal current turbine under linear wave is simulated by using the computational fluid dynamics software Fluent. The numerical simulation results show that the horizontal axis tidal current turbine will be subjected to the action of alternating marine environmental load under the action of wave. Under the action of the environmental load, the hydrodynamic performance parameters of the turbine will change periodically. Under normal working condition, the fluctuation range of hydrodynamic performance parameters of turbine is about 3%, the wave has little effect on turbine, and the fluctuation range of hydrodynamic performance parameter of hydraulic turbine is about 35% under the limit condition, the wave has great influence on the turbine. The influence of wave on turbine should not be underestimated. In engineering, the fatigue strength of turbine blade and supporting structure should be improved by avoiding the wave affected area or taking appropriate measures. In order to reduce the influence and damage of wave on the performance of horizontal axis tidal current turbine.
【作者单位】：中国海洋大学工程学院;
【基金】：国家自然科学基金项目(51479185) 山东省重点研发计划项目(2015GSF115019)
【分类号】：TK730.1

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