单双向流下浪流轮机空心翼径向屈曲失效分析

Radial buckling failure analysis of hollow blades of single bidirectional flow wave turbine

以垂直卧式浪流轮机的空心翼(WTHB)为主要研究对象,采用动量理论、屈曲失效理论及三维数值模拟相结合的方法,考虑了WTHB在非单一浪流过程中产生的径向压缩应力,分析了浪流单双向作用力、水动力攻角和轮翼双支持点分布对空心翼屈曲失效的影响。结果表明,双向浪流作用下的空心翼稳定性明显优于传统单向浪流作用下空心翼,最优获能水动力攻角40°相较于20°的相对径向屈曲变形量最值较大,空心翼双支持点分布对整体极限型屈曲有较大影响。

The main research object is the hollow blade of a vertical horizontal wave turbine(WTHB).A combination of momentum theory,buckling failure theory and three-dimensional numerical simulation is adopted to investigate the radial compressive stress generated by WTHB during non-single wave processes.In addition,various factors affect the buckling failure of the hollow blade,such as unidirectional wave force,two-way wave force,hydrodynamic angle of attack,and double support point distribution of the wings.The results show that the stability of the hollow blades is obviously better than that of the traditional one-way wave;the angle of attack at 40°is optimal value of the obtained hydrodynamic angle of attack,but compared with angle of attack of 20°,there is larger radial bucking deformation value.The double-support point of the hollow blades has a greater influence on the overall ultimate buckling mode.