垂直轴潮流能水轮机设计及水动力性能分析

Design and Hydrodynamic Performance Analysis of Vertical Axis Tidal Current Turbines

为了对比不同结构形式的垂直轴潮流能水轮机的水动力性能,对三叶片-单列叶片式与六叶片-双列叶片式垂直轴型水轮机进行结构参数设计,采用CFD软件对处于特殊旋转角下的单列叶片式和双列叶片式垂直轴潮流能水轮机进行了2D流场计算,并对压力云图和流速场图进行了对比分析。结果表明:在设计流速2.5m/s下,双列叶片式水轮机叶片受到的压力的合力大于单列叶片式,即自启动性能优于单列叶片式;但是双列叶片式水轮机在轴线旋转角为0°、60°时,叶片间会产生流场相互干扰的问题,在轴线旋转角为30°、90°时,叶片出现尾流脱节、尾流紊乱的现象。

To compare the hydrodynamic performance of vertical axis tidal current turbines with different structures,this paper designed the structural parameters of three-blade single-row-vane type and six-blade doublerow-vane type vertical axis turbines.We analyzed the 2 Dlow fields of single-row-vane type and double-row-vane type vertical axis tidal current turbines under special rotation angle by using CFD software,and compared the pressure cloud diagram and velocity field diagram.The results show that the resultant pressure of the blade of double-row-vane type hydro turbine is greater than that of single-row-vane type at the design flow rate 2.5 m/s.The self-starting performance of double-row-vane type hydro turbine is better than that of single-row-vane type.But blades in double-row-vane type turbine will introduce flow field interference when the rotation angle of the axis is 0 and 60 degrees.And disjointed and disordered wake flows arise on the blades of double-row-vane type turbine when the rotation angle of the axis is 30 and 90 degrees.