EXPERIMENTAL STUDY OF THE RADIATIVE HEAT FLUX DURING WATER MIST FIRE SUPPRESSION IN AN ENGINE COMPARTMENT - Archive ouverte HAL Accéder directement au contenu
Proceedings/Recueil Des Communications Année : 2023

EXPERIMENTAL STUDY OF THE RADIATIVE HEAT FLUX DURING WATER MIST FIRE SUPPRESSION IN AN ENGINE COMPARTMENT

Résumé

Thermal radiation is one of the most important factors that must be understood in the field of fire safety in order to improve radiative protection capabilities and prevent bigger hazards. In this context, fire protection systems are essential parts of military vehicles, with water mist being one of the systems potentially applied to protect the engine compartment. Water mist not only has the potential to extinguish the fire but is also effective in reducing the radiation effect. In this study, a scale 1 test bench of a military vehicle's engine compartment has been developed. Total and radiative heat flux sensors were placed in the test bench compartment in two positions with different orientations to evaluate the heat flux in the compartment with and without a water mist system, along with the effect of the airflow velocity generated by a radiator fan. A thermocouple tree was placed inside the test bench above the fire, and a thermocouple also was placed around the heat flux sensor to study temperature evolution. A gas analyzer was also used to evaluate the gas concentration. The result shows that the heat flux sensor's orientation affects the radiation to total heat flux ratio. The water mist show has an effect of reducing rapidly the radiative heat flux as well as the temperature maximum and temperature average on the thermocouple tree after activation. The total heat flux and the temperature around the heat flux sensor increase shortly after activation and then decrease. CO concentration shows an increase after water mist activation. The airflow velocity shows an effect on the maximum radiative heat flux
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Dates et versions

hal-04199132 , version 1 (07-09-2023)

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Citer

Soleh Junjunan, Khaled Chetehouna, Axel Cablé, Antonin Robinet, Souria Hamidouche, et al.. EXPERIMENTAL STUDY OF THE RADIATIVE HEAT FLUX DURING WATER MIST FIRE SUPPRESSION IN AN ENGINE COMPARTMENT. Begellhouse, pp.375-382, 2023, ⟨10.1615/RAD-23.560⟩. ⟨hal-04199132⟩
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