燃气管网置换过程动态仿真计算与研究

DYNAMIC SIMULATION OF REPLACEMENT PROCESS OF GAS PIPELINE NETWORK

燃气置换过程难以监测,供气压力、置换时间等参数计算大都依赖人员经验,容易产生资源浪费和安全隐患。本文建立燃气管网置换过程动态仿真模型,在采用一维拓扑网络算法的基础上,对管网中的阻力系数进行精确求解。文章首先建立水平直管结构,结合Fluent仿真对算法进行验证,并对燃气置换过程的规律进行分析和总结。最后将模型应用于实际燃气管网置换工程中,与实测数据进行对比,结果表明所提出的模型精度可以满足工程需求,能为燃气管网置换方案的制定提供重要指导依据。

At present,the gas replacement process is difficult to monitor.Most of the parameters such as gas supply pressure and replacement time need to be calculated from personnel experience,which will cause a waste of resources and potential safety hazards.In this paper,a dynamic simulation model of gas pipeline network replacement process is established.Based on the one-dimensional topological network algorithm,the resistance coefficient in the pipeline network is accurately solved.Firstly,the horizontal straight pipe structure is established,and the correctness of the algorithm is verified by Fluent.Then the law of gas replacement process is analyzed and summarized.At the end of this paper,the model is applied to a gas pipeline network replacement project and compared with the actual measurement data.The calculation results show that the accuracy of the model proposed in this paper meets the requirements,and can provide an important guiding basis for the formulation of gas pipeline network replacement scheme.