适用于CCUS的二氧化碳输送管道止裂韧性模拟计算研究进展  

Research Progress on Simulation Calculation of Crack Arrest Toughness of CO_(2) Transportation Pipelines for CCUS

作　　者：陈兵[1] 李磊磊 齐文娇 唐春丽 CHEN Bing;LI Leilei;QI Wenjiao;TANG Chunli(School of Mechanical Engineering,Xi'an Shiyou University,Xi'an 710065,China)

机构地区：[1]西安石油大学机械工程学院,西安710065

出　　处：《焊管》2024年第10期57-65,96,共10页Welded Pipe and Tube

基　　金：陕西省重点研发计划项目“基于CCUS的含杂质CO_(2)管道输送安全关键技术研究”(项目编号2022SF-233);西安石油大学研究生创新立项项目“基于流固耦合的CO_(2)管道止裂韧性模拟计算研究进展”(项目编号YCS23114180)。

摘　　要：CO_(2)输送管道是CCUS技术中连接碳捕集和碳利用的纽带,但是由于CO_(2)的特殊物理性质和减压性质,使得管道的止裂控制成为制约CO_(2)输送管道安全运行的难题。基于动态断裂力学,从裂纹驱动力和阻力两个方面,深入介绍了CO_(2)输送管道止裂控制机理;对比分析了当前长输管道常用止裂韧性指标的优缺点,在参考较为成熟的输气管道止裂控制模型的基础上,总结得到了适用于CCUS工程应用的CO_(2)输送管道止裂韧性预测模型。对于国内外采用全尺寸爆破试验得到止裂韧性的局限性,提出了应进一步结合流固耦合数值模拟方法开展CO_(2)输送管道止裂控制研究的建议。归纳了目前常用的流固耦合数值模拟计算软件,对国内外采用的真实和简化流固耦合方法进行了介绍,从流体减压模型的建立、韧性断裂准则的选择、材料损伤力学模型的建立等方面对比了真实和简化流固耦合方法的优缺点,并进一步讨论了两种方法的适用情况。以期为CO_(2)输送管道止裂韧性计算提供参考,保障CO_(2)输送管道安全运行,为推进我国CCUS技术产业化提供帮助。CO_(2) pipelines are the link between carbon capture and carbon utilization in CCUS technology.However,due to the special physical properties and decompression properties of CO_(2),crack arrest control of the pipeline has become a difficult problem restricting the safe operation of CO_(2) transport pipelines.Based on dynamic fracture mechanics,this research introduces the crack control mechanism of CO_(2) pipeline from two aspects of crack driving force and resistance;the advantages and disadvantages of the commonly used crack arrest toughness indicators of long⁃distance pipelines were compared and analyzed,and the prediction model of crack arrest toughness of CO_(2) pipelines suitable for engineering application were summarized based on more mature crack arrest control models of gas pipelines.The limitations of crack arrest toughness obtained by full scale burst tests at home and abroad were reviewed,and the suggestion that further study on CO_(2) crack arrest control should be carried out with fluid⁃structure coupling numerical simulation method was put forward.The current common fluid⁃structure coupling numerical simulation software were summarized,and the real and simplified fluid⁃structure coupling methods used at home and abroad were reviewed.The advantages and disadvantages of the real and simplified fluid⁃structure coupling methods were compared from the aspects of the establishment of fluid decompression model,the selection of ductile fracture criterion and the establishment of material damage mechanics model,and the application of the two methods was further discussed.The research results can provide references for the calculation of arrest toughness of CO_(2) pipeline,ensure the safe operation of CO_(2) pipeline and shorten the industrialization process of CCUS technology in China.

关 键 词：CCUS CO_(2)输送管道 止裂韧性 流固耦合 

分 类 号：TG113.25[金属学及工艺—物理冶金] TE823[金属学及工艺—金属学]