安装于跨海桥梁下部结构的竖轴潮流能水轮机水动力性能研究

文章采用物理模型实验和基于Fluent的二维数值模拟方法研究了竖轴水轮机安装在典型桥梁下部结构(单圆桩、圆端形墩台、四圆桩)且相对尺寸发生变化时,水轮机水动力性能的变化情况.研究结果表明:与桥梁下部结构组合后,竖轴水轮机的能量输出显著提升,单圆桩提升幅度最大,圆端形墩台次之,四圆桩最小;单圆桩和圆端形墩台相对水轮机尺寸...

Hydrodynamic study of vertical axis tidal current turbine installed on the substructure of cross-sea bridge

There are many cross-sea bridges in China that pass through tidal current energy enrichment areas.Installing vertical axis tidal current energy devices in the substructure of bridges can achieve good environmental and economic benefits.Experimental and two-dimension numerical(based on Fluent)methods are adopted to study the hydrodynamic performance of the vertical axis turbine when the turbine is installed on the typical substructure(single-round-pile,round-end pier,four-round-piles)and the relative size changes.The results show that the energy output of the vertical axis turbine is significantly improved when the turbine is combined with the substructure,while the single-round-pile has the largest improvement,the round-end pier is the second,and the four-round-piles is the smallest.The energy output of the turbine increases with the increase of the single-round-pile and the round-end pier’s relative size to the turbine,and the trend is opposite when the four-round-piles is used.The high velocity region near the substructure increases the turbine’s energy input while expanding the turbine’s energy-receiving area and increasing the energy-receiving amplitude,which is the reason that the turbine’s energy output increases when the turbine is installed on the substructure.