关键词: 天然气, 管道, 动态, 不稳定流动, 分析方法

Abstract: A lot of gas transportation and distribution systems consist of a large set of highly integrated safe and economic pipe networks with a wide range of pressure.Simulation and analysis play a major role in system planning and designing.In the light of system characteristics of complex gas pipeline,this paper presents a realistic transient flow model consisting of simple models of pipeline subsystems and connecting conditions,boundary conditions and initial condition associated with subsystems by using system analysis method.The solutions in wide sense are obtained by theory of functional analysis and operator series method.A ge neral computer program has been developed for this model and solutions have been used successfully in a local natural gas transmission network in Sichuan.It is proved that the model and algorithm proposed in this paper are of the advantages of convenient calculation,high precision,saving time and wide applied range by way of analysis and application.

Key words: natural gas, pipeline dynamic, unsteady state flow, analytical method