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针对特征线法用于管网非恒定流数值计算存在的不足不利于处理短管问题,采用调整波速、刚化短管、隐式差分三种方法处理特征线法计算中的短管,设计了一个带阀门的简单管路,并通过计算非恒定流过程中三种方法对阀门端压力值的影响,分析了精度及适用条件,得出采用隐格式处理短管适用范围最广,精度最高。
In view of the shortcomings of the characteristic line method used in the numerical calculation of the unsteady flow in the pipe network, which is not conducive to the handling of the short pipe, the short pipe in the characteristic line method is treated by adjusting the wave velocity, the rigidized short pipe, and the implicit difference method A simple pipeline with valve, and through the calculation of the three methods of non-constant flow in the process of valve pressure on the value of the end of the analysis of the accuracy and application conditions, concluded that the adoption of implicit format processing the shortest range of the most widely used, the highest accuracy.