管网最小平方和法初始流量分配

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,并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,建立了初始流量分配的数学模型,用C 语言编制了计算程序.实例计算和分析表明,用最小平方和法求解各管段初始流量,不需手工预分初始流量,也不需预先确定各管段的流体流动方向,求解所得初始值接近真实值,数值计算的收敛速度大大提高.

The 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 is established according to the peculiarity that the pipeline flow state is usually at drag square area, and a calculate program is written out with C . The calculating and analyzing of instance show that computing every pipeline initiatory flow with the method of minimum square summation need not handwork preliminary distributing initiatory flow and assuming flowing direction of every pipeline fluid. Mean while,the computed initiatory value meets the true value,the convergence velocity of numerical calculation is greatly improved.