摘要
对30 W海流能水平轴水轮机进行叶片设计,应用FLUENT软件对水轮机的水动力性能进行数值模拟,研究了边界效应对叶片表面压力、流场、湍流强度、获能和轴向力的影响。受海底边界效应影响,海流速度沿深度呈现梯度变化,底层流速较小,中上层流速较大。边界效应导致水轮机的水动力性能呈现周期性变化,降低了水轮机的获能和轴向力。机组布置时,宜选择水流稳定且流速较大的中上层区域。
The blade of a 30W horizontal axis marine current turbine was designed. Numerical simulation of hydrodynamic performance of marine current turbine was made by using computational fluid dynamic software FLUENT. The influence of boundary effect to surface pressure distribution of blade, velocity distribution of flow field, turbulent kinetic energy, power and axial force were analyzed. Velocity gradient along the water depth is caused by boundary effect of bed. The closer to bottom, the smaller flow velocity. Boundary effect leads to periodic change of hydrodynamic performance, and power and axial force is reduced then. Marine current turbine should be installed in the upper level of seawater which has a stable and larger velocity.
出处
《海洋工程》
CSCD
北大核心
2017年第2期75-82,共8页
The Ocean Engineering
基金
江苏省科技支撑计划-工业部分资助项目(BE2014091)
与防波堤结合的新型波浪能发电及利用关键技术资助项目
关键词
水平轴水轮机
水动力性能
边界效应
海流能
horizontal axis turbine
hydrodynamic performance
boundary effect
power
