Czasopismo | MATERIAŁY BUDOWLANE | Rocznik 2024 - zeszyt 12

CFAST and FDS simulations of temperature in unsealed apartment – comparison of model results with experimental data

Symulacje temperatury CFAST i FDS w rozszczelnionym mieszkaniu – porównanie wyników modelowania z danymi eksperymentalnymi

10.15199/33.2024.12.09

nr katalogowy: 152144
10.15199/33.2024.12.09

Streszczenie

W artykule przedstawiono walidację modeli CFAST i FDS w przypadku pożaru w rozszczelnionym mieszkaniu. Szybkość wydzielania ciepła otrzymano z testu Room Corner, a dane eksperymentalne z pełnoskalowego testu pożarowego. Porównanie dotyczyło rozkładu temperatury w wybranych punktach pomieszczenia. Do symulacji FDS zastosowano dwa warianty, pierwszy z jednym źródłem ognia (fotelem) i bez uwzględnienia wiatru oraz drugi z dwoma źródłami ognia (fotelem i kanapą). Ponadto, w wariancie drugim zastosowano 300-sekundowe opóźnienie drugiego źródła pożaru oraz wiejący wiatr, wynikające z obserwacji pożaru w pełnej skali. Dokładność odwzorowania temperatury za pomocą obu modeli zależy od lokalizacji punktu pomiarowego w stosunku do źródła pożaru i otworów wentylacyjnych. Odwzorowanie charakterystyki temperatury w modelu polowym FDS można znacznie poprawić przez uwzględnienie wiatru i dodatkowej powierzchni pożaru elementu, który zaczyna się palić po pewnym czasie.

Abstract

This paper presents the validation of the CFAST and FDS models for a fire in an unsealed dwelling. The heat release rate was obtained from the Room Corner test and the experimental data from the full-scale fire test. The comparison concerned on the temperature distribution at selected points in the room. Two variants were used for the FDS simulation, the first with one fire source (an armchair) and no consideration of wind, and the second with two fire sources (an armchair and a sofa). In addition, the second variant used a 300-second delay for the second fire source and the wind, resulting from the full- -scale fire observation. The accuracy of temperature mapping with both models depends on the location of the measuring point in relation to the fire source and the vents. Equally importantly, the representation of the temperature characteristics in the FDS field model can also be significantly improved by taking into account the wind and the additional fire area for a component that starts to burn after a certain time.

Słowa kluczowe

Keywords

Bibliografia

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