Abstract:

Non stationary hydrodynamic processes are complex physical phenomena, while the hydrodynamic parameters (velocities and pressure) vary both in time and space. Unsettled movement hydraulic coefficient is often produced experimentally. The main reason of this fact nowadays is the existence of the completed and convincing theory. The paper deals with the using the stochastic approximation method and the construction of a natural cubic splain.

Keywords: main pipeline, unsteady motion, hydraulic resistance factor