Модернизация метода характеристик для расчёта интенсивных импульсов нагнетания жидкости

Abstract

We use the basic model of motion of viscous fluid through a conduit leading to the telegraph equation. To model large-amplitude pulses the local resistances and the transfer rates are additionally taken into account. It is shown that in this case the calculation can be carried out by the method of characteristics in a regular coordinate grid. The influence of the transfer rate is reduced to changing the grid step in time, and the local resistance at the input, output, or flow reversal point is replaced by the distributed one. In the choke installation locations the calculation scheme becomes more complicated and involves solving quadratic equations