COMPUTER SIMULATION OF HEAT EXCHANGE IN FIRE STOVE FURNACE INSTALLATIONS FOR FIRE RESISTANCE TESTS OF BUILDING CONSTRUCTION

  • A. V. Peregin Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of Ukraine
  • O. M. Nuianzin Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of Ukraine
  • M. A. Krystal Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of Ukraine
  • P. I. Zaika Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defence of Ukraine
Keywords: load-bearing wall, mathematical modeling, fire temperature regime, computational fluid dynamics (CFD)

Abstract

Improving the methods and means of assessing the fire resistance of building structures is a topical issue, because both experimental and computational methods of determination there are errors. According to the results of this work, the following is established:

The aim of the work was to develop a computer model of a fire furnace in the FDS software package and to analyze the results of heat and mass transfer modeling to identify the possibility of reproducing the test conditions for fire resistance of building structures.

The mathematical apparatus and possibilities of the FDS software package were analyzed, which allow to create flame-burning installations for modeling heat and mass transfer in the furnace chamber. An algorithm for creating a model of a fire furnace with flame combustion in the above software package is revealed. In this software package of computational gas hydrodynamics, 2 configurations were created, which differed in geometric dimensions and the number of burners for computational experiments. The distribution of temperatures over the entire area of ​​the furnace in the created Configurations is checked and the obtained results of heat and mass transfer modeling in fire furnace chambers are analyzed.

After analyzing the results, it became possible to say that there are significant shortcomings in the creation of models. The peculiarity of the software package is that in the process of calculation it is impossible to adjust the intensity of the flame flares. The data is stored in the preprocessor, the calculation time is set, then the FDS works autonomously, which does not allow to reproduce the standard temperature in the furnace chamber. There is an intense heating of the furnace chamber. After 2 minutes, a steady state temperature is reached, which is maintained during the calculation time.

Published
2020-11-30
Issue
Vol. 4 No. 1 (2020): Collection of Scientific Papers of Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Protection of Ukraine «Emergency Situations: Prevention and Liquidation»
Section
Статті