天然气管网的初始流量分配

在对天然气管网进行离线数值模拟计算时，需要给各管段分配初始流量，作为迭代计算的初始值。根据管道的流动状态多在阻力平方区的特点，建立初始流量分配的数学模型，用C 语言编制出计算程序。对实例进行计算和分析，表明用最小平方和法求解各管段初始流量时，不需手工预分初始流量，也不需预先确定各管段流体流动方向，求解所得初始值接近真实值，使数值计算的收敛速度大大提高。

Initiatory Flow Distribution of Natural Gas Network

When a natural gas network is done off-line numerical simulation,every pipeline needs be distributed initiatory flow as the initiatory value of iterative computation.A mathematical model of initiatory flow distribution was established according to the peculiarity that the pipeline flow state was usually at drag square area,and a calculate program was written out with C .The calculating and analyzing of instance shows that computing every pipeline initiatory flow with the method of minimum square summation needn't handwork preliminary distributing initiatory flow and assume flowing direction of every pipeline fluid.Meanwhile,the computing initiatory value meets the true value and greatly improves the convergence velocity of numerical calculation.