带汇管的天然气管路对流量计量性能的影响研究

Research on the Performance Influence of the Flow Metering in the Natural Gas Pipeline With the Remit Pipe

天然气准确计量直接影响开发、运行、配给和用户等各方的经济利益,而管路结构是影响天然气流量计量准确性的主要因素。以带汇管的天然气管路为研究对象,采用数值模拟和实验测量的方法,分别对汇管采用不同的进出口方式以及是否在其下游加装板式整流器的各种管路结构内的流场进行研究,结果表明,汇管进出口错开且无整流器的管路结构在汇管下游恢复到充分发展的湍流断面需要的长度最长,而汇管进出口相对且有整流器的管路结构则在整流器下游恢复到充分发展的湍流断面需要的长度最短。对管路结构对天然气流场影响规律的研究可直接指导天然气管路结构设计及流量计选择合理的安装位置。

The flow measurement of the natural gas directly influences the economic benefit,which includes development,operation,allotment and the utilization in the industry of the natural gas.Moreover the structure of the pipeline is the main factor for the accuracy of the flow metering.The research on the internal flow field of various kinds of pipe structure with the remit pipe,which were the different inflows and whether equipped with the panel rectifier separately was done with the method of the numerical simulation and the experiment.The results show that the desire length to recover the full development turbulence section in the downstream of the remit pipe is most in the pipe structure with the stagger inlet-outlet and no rectifier.While that in the pipe structure with the opposite inlet-outlet and with a rectifier reaches the least.It can be got that the most appropriate installation site of the flow meter and the design of the pipe structure of the natural gas from the research on the influence pattern of the gas flow field.