S. Vinogradov, S. Shakhov, D. Saveliev, A. Melnychenko, O. Polivanov. Features of heat release rate simulation methods in FIRE DYNAMICS SIMULATOR. С. 79-94.

 

Features of heat release rate simulation methods in FIRE DYNAMICS SIMULATOR

 

Stanislav Vinogradov

National University of Civil Defenсe of Ukraine

https://orcid.org/0000-0003-2569-5489

 

Stanislav Shakhov

National University of Civil Defenсe of Ukraine

https://orcid.org/0000-0003-3914-2914

 

Dmytro Saveliev

National University of Civil Defenсe of Ukraine

https://orcid.org/0000-0002-4310-0437

 

Andrii Melnychenko 

National University of Civil Defenсe of Ukraine

https://orcid.org/0000-0002-7229-6926

 

Oleksandr Polivanov

National University of Civil Defenсe of Ukraine

https://orcid.org/0000-0002-6396-1680

 

DOI: https://doi.org/10.52363/2524-0226-2023-37-6

 

Keywords: fire research, fire safety, heat release rate, Fire Dynamics Simulator, PyroSim

 

Аnnotation

 

The peculiarities of the methods of modeling the rate of heat release in the Fire Dynamic Simulator have been revealed. The change in the rate of heat release over time was compared, depending on the modeling method, and methods were practically implemented on the example of a typical room to identify the influence of the rate of heat release on the development of dangerous fire factors. When using the Fire Dynamic Simulator to study hazardous factors in full, it is not clear what value of the heat release rate should be used when studying the dynamics of fire development, which affects the evaluation of the obtained results. Identifying the features of each of the methods will make it possible to use them effectively in order to properly assess the results obtained and further ensure the level of fire safety. As a result of the comparison of the change in the rate of heat release over time, depending on the modeling method, a classification of modeling methods was developed. During the practical implementation of the methods on the example of a typical room, it was found that when the first modeling method is used compared to the second, the temperature rise in the threaded time intervals increases by 1,5–3 times faster, respectively. During the analysis of the loss of visibility, it was found that when using a constant rate of heat release, the reduction of visibility at different time intervals is achieved faster than when the rate of heat release changes over time, respectively, by 1,6–3 times. During the analysis of the decrease in oxygen concentration, it was established that when using the first modeling method, the value of the oxygen concentration in the air decreases 1,2–1,6 times faster at different time intervals compared to the indicators of the second method. Thanks to the identified features of each of the modeling methods, recommendations for their use in FDS have been developed. This makes it possible to effectively apply methods and evaluate the results with subsequent decisions to ensure an adequate level of fire safety.

 

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