Vol.4, No 1, 2007 pp. 11 - 18
UDC
697.244.7.
RESULTS OF THE SIMULATION OF THE FLAME THERMAL RADIATION PROPAGATION THROUGH ROOM OPENINGS
Dejan Petković, Darko Zigar, Desimir Jovanović
University of Niš, Faculty of Occupational Safety
Abstract.
A still unsolved problem of fire transfer through room openings, especially by heat radiation and convection, as well as general lack of the literature dealing with the simulation methods, numerical experiments and calculations of spatial-temporal distribution of temperature field, imposes the need for its solution. To all this we can add data from practice pointing to the fact that fires in the buildings, in most cases, develop and spread through inner and outer openings. For this reason, in the world at large and in our country, fire models and software tools develop and get improved, namely, those that will lead to the results concerning propagation of thermal radiation through room openings in real time; they are to give adequate help in solving the given problem. Its solution, though, comprises making of an adequate mathematical model of the flame thermal propagation by radiation and convection as well as the choice and application of numerical techniques for solving the given problem in addition to the choice of an optimal software for calculation and a graphic display of the calculation results. The paper gives the results of the simulation of the flame thermal radiation propagation through room openings by using the program Fire Dynamics: Simulator (FDS).
Key Words:
Thermal Radiation, Fire Model, Software, Simulation
REZULTATI SIMULACIJE PROSTIRANJA TOPLOTNOG ZRAČENJA PLAMENA KROZ OTVORE PROSTORIJE
Nerešen problem prenošenja požara kroz otvore prostorije, posebno toplotnim zračenjem i konvekcijom, kao i potpuni nedostatak literature koja obrađuje metode simulacije, numeričke eksperimenate i proračune prostorno-vremenske raspodele temperaturnog polja, nameće potrebu da se ovaj problem rešava. Svemu ovome moraju se dodati i podaci iz prakse koji ukazuju na to da se požari u zgradama u najvećem broju slučajeva razvijaju i prenose kroz unutrašnje ili spoljašnje otvore. Iz ovog razloga u svetu i kod nas razvijaju se i usavršavaju požarni modeli i softverski alati koji će dovesti do rezultata za raspodelu toplotnog zračenja kroz otvore prostorije u realnom vremenu i pružiti adekvatnu pomoć u rešavanju datog problema. Rešavanje ovog problema obuhvata: izradu adekvatnog matematičkog modela prenošenja toplote zračenjem i konvekcijom, izbor i primenu numeričkih tehnika za rešavanje postavljenog problema i izbor optimalnog softvera za proračunavanje i grafički prikaz rezultata proračuna. U radu su dati rezultati simulacije prostiranja toplotnog zračenja plamena kroz otvor prostorije primenom programa Fire Dynamics Simulator (FDS).
Ključne reči:
toplotno zračenje, požarni model, softver, simulacija
