摘要
世界能源发展呈现低碳趋势,人们对天然气的需求日益增加。输运管道中由于气流脉动遇到弯头、变径管等突变结构而形成的激振力是管道振动的主要成因。π型管是天然气管道中常见的柔性补偿结构,常与压缩机出口的管路相连,往复式压缩机工作时产生的气流脉动在π型管处诱发的流致振动较为明显。文章基于计算流体动力学对含有突变结构的π型管进行气流脉动仿真分析,研究脉动幅值与突变结构的关系。结果显示,含突变结构的管道出口处的压力不均匀度比π型管分别高了3.8%和4.6%左右,当突变结构的尺寸从100 mm变化到200 mm时,管道出口处的压力不均匀度也从15.5%左右变化到19.9%左右,可以看出突变结构对π型管内部的气流脉动呈现出不利影响,在实际工程应用中应尽量避免突变结构的使用。
The world's energy development shows a low-carbon trend,and people's demand for natural gas is increasing.In the natural gas pipeline,the excitation force is the main cause of pipeline vibration due to the gas flow pulsation encountered in the elbow,reducer and other mutant structures,etc.Theπ-pipe is a common flexible compensation structure in the natural gas pipeline,and it is often connected to the pipeline at the outlet of the compressor,and the gas flow pulsation generated by the reciprocating compressor induces flow vibration at theπ-pipe more obviously.In this paper,the simulation analysis of airflow pulsation is carried out based on computational fluid dynamics on theπ-pipe with mutation structure,and the relationship between the pulsation amplitude and the mutation structure is investigated.The results show that the pressure inhomogeneity at the outlet of the pipe with mutation structure is about 3.8%and 4.6%higher than that of theπ-pipe,and the pressure inhomogeneity at the outlet of the pipe changes from about 15.5%to 19.9%when the size of the mutation structure is changed from 100 mm to 200 mm,which shows that the mutation structure has an unfavorable effect on the airflow pulsation inside theπ-pipe,and should be avoided in the practical engineering applications.It can be seen that the mutation structure has unfavorable effects on the airflow pulsation inside theπ-pipe,and the use of mutation structure should be avoided in practical application.
作者
谭红莹
刘健
郎子进
纪志远
司红涛
单世超
周波
Tan Hongying;Liu Jian;Lang Zijin;Ji Zhiyuan;Si Hongtao;Shan Shichao;Zhou Bo(Design Institute of Offshore Oil Engineering Co.,Ltd.,Tianjin 300461,China;State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,School of Naval Architecture Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China)
出处
《化工设备与管道》
CAS
北大核心
2024年第4期56-63,共8页
Process Equipment & Piping
基金
国家自然科学基金面上项目(52071059)。
关键词
气流脉动
流致振动
突变结构
减振
airflow pulsation
fluidic vibration
mutant structures
vibration damping
