天然气与石油2026，Vol.44Issue(1)：24-32,9.DOI:10.3969/j.issn.1006-5539.2026.01.003
基于隐式压力修正的天然气管道瞬变流动仿真研究
Simulation study of transient flow in natural gas pipelines based on the implicit pressure correction method
摘要
Abstract
With the continuous expansion of China's natural gas pipeline network,the transient flow in natural gas pipelines has a significant impact on the gas transmission efficiency and safe operation of the pipelines,making accurate simulation particularly important.A transient mathematical model incorporating the continuity equation,momentum conservation equation,and energy conservation equation is established in this study,and a method based on implicit pressure correction is proposed.By combining the convective and pressure terms in the momentum equation,a pressure correction equation based on the total pressure correction term is developed,and the staggered grid method is adopted to discretize the governing equations.Finally,a transient flow model for non-isothermal natural gas pipelines based on implicit pressure correction method is developed.Validation against experimental data from natural gas pipelines indicates that the numerically predicted pressure and volumetric flow rate at the pipeline inlet,midpoint,and outlet are in good agreement with the measured data,demonstrating the accuracy and applicability of the proposed model and method.In the study of the valve-closing transient process,it is found that after valve closure,the mass flow rate,pressure,and density in the pipeline all exhibit fluctuating propagation.The pressure rises rapidly near the valve and propagates upstream along the pipeline,with density fluctuations exhibiting spatiotemporal characteristics similar to those of the pressure fluctuations.The transient flow model for non-isothermal natural gas pipelines based on the implicit pressure correction method can effectively simulate the transient flow processes in natural gas pipelines,providing a theoretical basis and technical reference for ensuring the safe operation of pipelines,optimizing pipeline design,and improving scheduling management.关键词
瞬变流动/压力修正/总压/对流项Key words
Transient flow/Pressure correction/Total pressure/Convective term引用本文复制引用
任长胜,徐波..基于隐式压力修正的天然气管道瞬变流动仿真研究[J].天然气与石油,2026,44(1):24-32,9.基金项目
国家石油天然气管网集团有限公司科学研究与技术开发项目"油气管网在线仿真平台研发及应用(一期)"(SSCC202104) （一期）
