摘要
为了揭示自由液面变化对安装螺旋列板的水下管道水动力载荷的影响,并检验螺旋列板在部分脱落状态下的涡激振动抑制效果,通过安装螺旋列板的水下管道水动力模型试验,研究了不同雷诺数下近自由液面区域(浸没深度与管道直径比值为1~4)和近假底区域(离底间隙与管道直径比值为1~4)阻力系数变化,分析了螺旋列板在30%长度破损情况下的涡激振动抑制效果。试验结果表明:当水下管道从4倍直径浸没深度逐渐接近自由液面时,其阻力系数逐渐增大;当水下管道从4倍直径离底间隙逐渐靠近假底时,其阻力系数逐渐减小;随着雷诺数增大,30%破损的螺旋列板对涡激振动的抑制效率变化与螺旋列板全覆盖方案基本一致,均呈下降趋势,但仍然具有较好的抑制效果。
To reveal the influence of free surface variation on the hydrodynamic loads of submarine pipelines with spiral strakes installed and verify the vortex-induced vibration(VIV)suppression effect of spiral strakes under partial detachment,hydrodynamic model tests were conducted on submarine pipelines equipped with spiral strakes.The tests investigated the changes in drag coefficient in the near-free-surface region(with a ratio of immersion depth to pipeline diameter is 1-4)and the near-false bottom region(with a ratio of bottom clearance to pipeline diameter is 1-4)under different Reynolds numbers.Additionally,the VIV suppression effect of spiral strakes was analyzed when 30%of their length was damaged.The test results show that when the submarine pipeline is immersed from a depth of four times the diameter to approaching the free surface,its drag coefficient gradually increases;when the submarine pipeline approaches the false bottom from an initial distance of four times the diameter,its drag coefficient decreases.With the increase in the Reynolds number,the suppression efficiency of VIV by the 30%damaged spiral strake exhibits a trend similar to that of the full-coverage scheme,both showing a decrease.Nevertheless,it still maintains a considerable suppression effect.
作者
胡克
王广生
陈松贵
鱼童
HU Ke;WANG Guangsheng;CHEN Songgui;YU Tong(National Engineering Research Center for Port Hydraulic Construction Technology,Tianjin Research Institute for Water Transport Engineering of Ministy of Transport,Tianjin 300456,China;China Harbor Engineering Company Ltd.,Beijing 100027,China)
出处
《河海大学学报(自然科学版)》
北大核心
2025年第6期119-123,157,共6页
Journal of Hohai University(Natural Sciences)
基金
国家自然科学基金项目(52039005,52001149)
中央级科研院所基本科研业务专项资金项目(TKS20230102)。
关键词
水下管道
螺旋列板
涡激振动
水动力特性
阻力系数
submarine pipeline
spiral strake
vortex-induced vibration
hydrodynamic characteristic
drag coefficient
