变工况气液段塞流诱导的柔性立管振动响应  

Slug flow-induced vibration of a flexible catenary riser model with variable gas-liquid flows

作　　者：高岳[1] 朱红钧[1,2] 颜知音 王珂楠 胡洁 许兵 GAO Yue;ZHU Hong-jun;YAN Zhi-yin;WANG Ke-nan;HU Jie;XU Bing(School of Petroleum Engineering,Southwest Petroleum University,Chengdu 610500,China;State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300350,China;Natural Gas Purification Plant,PetroChina Southwest Oil and Gas Field Company,Chongqing 400021,China;Offshore Oil Engineering Co.,Ltd.,Tianjin 300451,China)

机构地区：[1]西南石油大学石油与天然气工程学院,四川成都610500 [2]天津大学水利工程仿真与安全国家重点实验室,天津300350 [3]中国石油西南油气田公司天然气净化总厂,重庆400021 [4]海洋石油工程股份有限公司,天津300451

出　　处：《振动工程学报》2023年第4期1044-1053,共10页Journal of Vibration Engineering

基　　金：国家自然科学基金面上项目(51979238);天津大学水利工程仿真与安全国家重点实验室开放课题(HSSE-2005)。

摘　　要：柔性立管广泛用于海洋油气输送,因管内气液两相流压力、密度等的时空变化,易激发立管的振动响应。针对水动力段塞流诱导的柔性立管振动响应问题,在气液两相流循环实验系统中开展了水动力段塞流诱导的悬链线型柔性立管模型振动响应测试,采用非介入高速摄像测试方法同步捕捉了柔性立管模型的振动位移与管内气液两相的流动特征。通过改变段塞流混合流速(0.8~3.0 m/s)和气液比(1.0~11.0),剖析了振幅与振频的时空分布、振动模态切换等振动特性与管内液塞长度、运移速度、流动频率间的内在联系。结果表明:柔性立管模型的振动主要由一阶模态主导,振动模态随时间发生切换,即存在时间上的模态切换,根据其特征,辨识了三种模态切换形式,对实验组次进行了分区。不同的模态切换形式与管内的段塞长度、段塞流动频率以及段塞在管内的分布有关。Flexible risers are widely used in offshore oil and gas transportation.The internal oil-gas mixed flow contributes to the vi⁃bration response of flexible risers due to the temporal-spatial evolution of fluid pressure and density.Experiments were conducted in an air-water test loop to investigate the vibration response of a flexible catenary riser model excited by internal hydrodynamic slug flows.A non-intrusive technique of high-speed imaging method was employed to record the vibration displacements of riser model and the characteristics of two-phase flow in the riser simultaneously.The gas-liquid ratio ranges from 1.0 to 11.0 with a constant mixture velocity that increases from 0.8 m/s to 3.0 m/s.An in-depth discussion is conducted on the intrinsic link between the spa⁃tial-temporal evolution of the response displacements,vibration frequency,mode switching and the slug flow features including the length of liquid slug,migration velocity,recurrence frequency of slugs.Experimental results indicate that there is mode switching in time,and three types of mode switching are identified on the basis of the switching characteristics.A partition map of considered cases in terms of mode switching is proposed.The results show that the mode switching mainly depends on the length,recurrence frequency and the distribution of slug flow in the riser model.

关 键 词：流致振动 水动力段塞 柔性立管 模态切换 非介入测试 

分 类 号：TV131.2[水利工程—水力学及河流动力学] P756.2[天文地球—海洋科学]