横向布置单桩潮流能水轮机的数值模拟研究

Numerical simulation study of single pile tidal stream turbine with different lateral spacing

文章以单桩潮流能水轮机为研究对象,通过数值计算的方法对横向布置下两台单桩潮流能水轮机的尾流场及机组性能进行研究。通过对比不同横向间距下单桩潮流能水轮机的尾流场,获得了横向间距对潮流能水轮机尾流场的影响规律。数值计算结果表明:单桩结构会改变水轮机的纵向尾流场,但对横向尾流场的影响较小;随着横向间距的改变,机组的功率系数和推力系数的变化幅值不超过0.01;横向间距对机组的横向尾流场也造成了影响,导致各个机组的尾流中心偏向两个机组的中间位置,且随着横向间距的增大,机组u/U0低于0.9的范围随之增大,幅值可达0.26D。

This paper takes single-pile tidal stream turbine as the research object,and studies the wake field and performance of two single-pile tidal stream turbines in a horizontal layout by numerical calculation.By comparing the wake field of a single pile tidal stream turbine with different lateral spacing,the law of different lateral spacing on the wake development of tidal stream turbine is obtained.The numerical calculation results show that:The single pile structure will change the longitudinal wake of the tidal stream turbine,but it has little effect on the lateral wake;With the change of the lateral spacing,the torque coefficient and thrust coefficient have changed less than 0.01.The lateral spacing also affects the lateral wake,causing the center of the wake of each tidal steam turbine to deviate to the middle position of the two tidal stream turbines.As the lateral distance increases,the range of u/U0 below 0.9 increases,and the amplitude can reach 0.26D.