附加分离盘控制隔水管涡激振动的研究

采用k-ω湍流模型数值模拟并风洞试验研究了利用分离盘抑制隔水管涡激振动的效果。对加装0~2倍分离盘直径的隔水管系统,在雷诺数30 000情况下所进行的计算与实验表明:模拟结果与实验的结果吻合较好,分离盘对隔水管具有明显的升阻力及频率控制效果;当分离盘长度是1~2倍直径时(L/D=1~2),数值模拟与风洞试验都表明减阻效果可达25%~30%,数值模拟减升效果可达25%~76%以上。

Controlling of Vortex-induced Vibration of Riser by Splitter Plate

In the paper,the numerical simulation with k-ω turbulence model and the wind tunnel experiment on the effect of controlling riser vortex-induced vibration(VIV) by splitter plate was carried out.The results of the simulation and experiment on the flow past risers of splitter plates with diferent ratio of the length to the diameter,L/D=0~2.0 with Reynolds number(Re) equals to 30 000 shows that:the simulation results of the riser model made good agreement with the ex-periment.Splitter plate can control the lift and drag coefficient and the frequency of vortex shedding obviously.When L/D=1.0~2.0,both the results of the simulation and experiment show that the average drag coefficient can be reduced up to 25%~30%,the simulation shows the am-plitude lift coefficient can be reduced up to 25%~76%.