摘要
城市燃气管网节点的压力、流量和温度等参数直接影响整个输配系统的运行。结合燃气管网实际运行工况,建立了包含能量方程在内的城市燃气管网不稳定流数学模型,采用隐式中心有限差分法对方程组线性化,应用Newton-Rapshan法迭代求解,在此基础上采用VC++6.0编制了燃气管网动态仿真软件。对某管网进行计算,得到该管网各节点压力、流量的变化趋势以及各管段压力沿程的变化趋势。通过和国外相关软件的计算结果比较,计算偏差在2%左右。
Pressure, flow and temperature of urban gas networks affect system function. Based on the practical work condition of gas networks, we build up non-steady flow model containing the energy equation, linerize it with implicit center FDM, solve it by Newton-Rapshan method, and empolder the relative software of transient model programmed with VC-b -4- 6. 0. By calcu- lating the networks, we get the trend of node pressure, node flow and pipe section pressure. Comparing the results for an actural network with the abroad softwares, we conclude that the error is within 2 %.
出处
《河北科技大学学报》
CAS
北大核心
2010年第2期112-115,157,共5页
Journal of Hebei University of Science and Technology
关键词
燃气管网
不稳定流
瞬态模拟
gas networks
non-steady flow
transient simulation
