41 KB950 KB41 KB199920252003Petelin, StojanVidmar, Peter13 straniletnik:49številka:5str. 254-266ISSN:0039-2480COBISSID:6476059URN:URN:NBN:SI:doc-46M2WWG0enslAssociation of Mechanical Engineers and Technicians of Slovenia et al.Zveza strojnih inženirjev in tehnikov Slovenije et al.Strojniški vestnikanalize požarovmatematični modelimodeli matematičninezgode prometneoblaki plinskipožariprometne nesrečerazlitjeAnaliza požara pri prometni nezgodi| An analysis of a fire resulting from a traffic accident|This paper is an attempt to define fire behaviour. The work is based on an analytical study of a fire's origin, its development and spread. The study is based on thermodynamics, heat transfer and a study of hydrodynamics and combustion, which represent the basis of fire dynamics. The article described a practical example of a leak of hazardous chemicals from a tank truck. Because of a flammability of the fluid, a fire may start. We have tried to model the fire propagation around a flammable-gas warehouse and show how the surrounding area could be affected. The model also considers weather conditions in particular the wind speed and direction. The computer code SaferTrace, which is based on zone models was used to do this. This means, that the phenomena are described with simplified physical and empirical equations, and one of the disadvantages of this computer code is its inability to consider the ground topology. Mathematical models are presented and they show the propagation of a hazardous fluid in the environment, while considering the metereological dataPrispevek temelji na zamisli, kako opisati obnašanje požara. Delo je zasnovano na analitičnem proučevanju nastanka, razvijanja in širjenja požara in obsega področja termodinamike, prenosa toplote, hidrodinamike ter zgorevanja,ki pomenijo osnovo modeliranja dinamike požarov. Delo prikazuje primer iztekanja nevarne gorljive kemikalije iz cisterne, kar lahko privede do požara. Skušali smo izdelati model širjenja požara v okolici skladišča z gorljivim plinom in prikazati, kolikšen del okolice bi bil pri tem prizadet. Model upošteva vremenske vplive, predvsem hitrost in smer vetra. Uporabili smo računalniški področni ali predelni model Safer Trace. V predelnem modelu se pojavi opisani s fizikalnimi in empiričnimi enačbami. Pomanjkljivost modela je, da ni mogoče upoštevati topologije področja. Predstavljeni so matematični modeli, ki prikazujejo disperzijo nevarne tekočine v okolico z upoštevanjem vremenskih vplivovTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo