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The concentration distribution characteristics of high-boiling-point fire suppressant in a forced flow
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DOI：10.1016/j.firesaf.2026.104906.png)
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Abstract
En 中文
Although there have been studies focusing on the transport characteristics of high-boiling-point fire suppressant under ventilation condition, there is a lack of quantitative characterization of their concentration distribution, as well as corresponding prediction models. Therefore, high-boiling-point fire suppressant concentration measurement experiments were conducted under different driving pressures and wind speeds using the fire extinguishing agent concentration analyzer. The influence laws of the initial spraying conditions on the concentration distribution were systematically explored. The experimental results indicate that the momentum competition between the initial momentum of the fire suppressant and the airflow is the core mechanism governing its concentration distribution. Under the same experimental conditions, the concentration level and the rising rate follows a pattern: 2-BTP > Novec/BTP-50>perfluorohexanone. The residence time of different fire suppressants are basically the same. Increasing the driving pressure or reducing the wind speed can increase the concentration of the fire suppressant, while reducing the driving pressure or wind speed can prolong the residence time. Based on this, the theoretical formula for the increasing stage of mass fraction was derived. The calculation formulas for the characteristic concentration of different fire suppressants were obtained through fitting.
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