The Heat Exchange Mathematical Model of Fire in Cable Tunnel Adequacy Research

Abstract

According to the results of the conducted studies, the adequacy of the mathematical models of cable tunnels for their further use in the study of the temperature regime of the fire was checked. For this purpose, full–scale tests and findings about the dynamics of temperature change in cable tunnels with known geometrical parameters and fire load were conducted at the experimental test site of the Ukrainian Civil Protection Research Institute (Kyiv).In one of the CFD software systems, a mathematical model of a cable tunnel similar to the actual one was created. A computational experiment was conducted. Based on the results of the computational experiment and field tests, the criteria for adequacy (Student's t–criterion, Cochran's Q–criterion, Fisher's F–criterion) and the relative error of the experiments were calculated. On the basis of the analysis, the adequacy of the used mathematical models was studied.In this article, further development of the use of computational experiments to study the heat and mass exchange processes during fires in cable tunnels.

Investigation of the regularities of temperature regime of fire in cable tunnels depending on its parameters

“…Despite the practical significance of such results, it is necessary to remember that cable products and construction constructions of cable tunnels are constantly being improved, therefore, additional ones need to be made. In previous studies [1,9], we carried out natural experiments and verified established mathematical models. The obtained data made it possible to confirm the adequacy of computer models of fires in cable tunnels and to conduct mathematical modeling to determine the temperature regime of a fire for testing fire resistance of building structures of cable tunnels.…”