螺旋列板对立管涡激振动的影响

Effect of Helical Strakes on VIV of Riser

为更好地理解螺旋列板对涡激振动(VIV)的影响,采用大涡模拟(LES)的方法,对长径比为10的立管和不同螺距、螺高的螺旋列板进行模拟分析。结果表明:附加螺旋列板加大了顺流向的阻力,并且在螺高一定时,阻力随着螺距的加大而增大;与螺距相比,螺旋列板的高度对立管VIV的影响更大,且随高度增大,抑制效果越好。

In order to better understand the effect of the helical strakes on the VIV, the LES method is used tosimulate and analyze the riser with a length to diameter of lO and the helical strakes with different pitch andheight. The results show that the helical strakes increase the resistance of the downstream flow. The resistanceincreases with the increase of the pitch when the height is constant. The height of the helical strakes is greaterthan the pitch, and more increasing of the height, the better the suppression effects.