EXPERIMANTAL RESEARCH OF LIQUID FLOWS ALONG THE PIPES IN FIXED SYSTEMS OF AUTOMATIC WATER FIRE EXTINGUISHMENT

Abstract

Forecasting the hydrodynamics of fluxes with variable length flow, taking into account both the rheological factor and the geometric features of the pipeline, as well as the development of modern methods of calculation of similar fire-fighting water supply systems is based on a modern understanding of physical processes in them and taking into account the actual and physical modeling perspective direction of research. In addition, further progress in solving the outlined tasks is not possible without revealing the peculiarities of the influence of fluid distribution factors along the pipeline on the performance of the stationary water and foam fire extinguishing systems.

The creation of fire extinguishing tools and technologies is associated with the development of various types of switchgear that provide the required flow of water extinguishing agent, with the solution of the problem of pressure differential viscous fluids with variable length flow. This kind of research can be useful in irrigation systems used in cooling systems of various dangerous objects, in fire-fighting equipment (fixed water and foam fire extinguishing systems), fire-fighting vehicles, fire-fighting equipment, etc. The difficulty of solving this type of problem is that when the fluid is distributed along the pipeline, the movement in its backbone is unstable, ie, when calculating energy losses, there is a need to take into account the influence of inertia forces from convective acceleration.

The results of the experiments of the study of viscous fluid flows in stationary systems of automatic water fire extinguishing with discrete fluid selection along the length of the pipeline are experimentally confirmed in the pipelines, the conclusions about the influence of the curved part of the pipeline on hydraulic losses are given.