Method of numerical calculation of unsteady currents of liquid in a flowing part of the device (or the pipeline) at the speeds of sound depending from its longitudinal co-ordinates

The method of the numerical solution of system of four differential equations of the characteristic describing unsteady currents of a liquid in flowing parts of devices or pipeline system (PS) at speeds (a) of sound, depending on their longitudinal co-ordinates (x) that is at a (x) = var is developed.
On its basis the method of numerical calculation of distribution of waves of hydroblows in the tubular or goffered jacket of cooling combustion chambers (CCh) of liquid rocket impellent installation (LRII) and in other devices and (CCh), where a (x) = var is developed.