螺旋侧板厚度对浮式风力机Spar平台涡激载荷的影响

Spar平台因其特殊的深吃水立柱式结构,在来流影响下极易发生涡激运动。为探究不同厚度螺旋侧板对浮式风力机Spar平台涡激载荷的影响,基于CFD方法,针对不同厚度螺旋侧板,对平台进行了数值模拟并详细分析平台的升阻力系数、压力场及涡量场等流场参数。结果表明:螺旋侧板可有效抑制涡激载荷,且随厚度增加,升力系数幅值先增加后减小,阻力系数逐步减小;在研究范围内,螺旋侧板厚度为0.10 D时,升力系数幅值最小,阻力系数与原型平台在同一范围内,对涡激载荷的抑制效果最好。

The influences of thickness of helical strakes on the vortex-induced loads of Spar platform of floating wind turbine

Due to its special structure of deep draft cylinder hull piercing into the water, the Spar platform is easily subjected to vortex-induced motions in certain flow conditions. In order to study the influences of different helical strakes thicknesses on the vortex-induced loads of Spar platform of floating wind turbine, based on the CFD method, the numerical analysis was carried out for the Spar platform with different thicknesses of helical strakes, the flow field parameters including vortex field, pressure field and lift and drag coefficient were analyzed in detail. The results showed that, the helical strakes was effective in restraining the vortex-induced loads, and the amplitude of the lift coefficient increased first and then decreased, the drag coefficients decreased gradually with the increment of thickness. In the research range, the lift coefficient was minimum when the thickness was 0.10D, while the drag coefficient varied little from bare platform,which had the best suppression effects on vortex-induced loads.