• Title/Summary/Keyword: Extinguishing Agent

Search Result 102, Processing Time 0.024 seconds

Research on the Rheological Properties of Aqueous Film Forming Foam to Respond to Ship Oil Fires (함정 유류화재 대응을 위한 수성막포의 유변학적 특성 연구)

  • Kil-Song Jeon;Hwi-Seong Kim;Jung-Hoon You;Yong-Ho Yoo;Jin-Ouk Park
    • Applied Chemistry for Engineering
    • /
    • v.34 no.6
    • /
    • pp.603-607
    • /
    • 2023
  • Aqueous film forming foam (AFFF) is a critical fire suppression agent used in combating hydrocarbon fires. This type of fire suppressant is highly effective due to its ability to form a protective film, dissipate heat, inhibit combustion, and utilize a blend of chemical substances to extinguish fires. While these properties offer significant advantages in responding to hydrocarbon fires, AFFF is distinct in its deployment as it is dispensed in the form of foam. Therefore, the rheological analysis of AFFF foam using a rheometer plays a crucial role in predicting the spray characteristics of AFFF for combating hydrocarbon fires, and this is closely associated with effective fire suppression. In this study, we conducted rheometer experiments to confirm the non-Newtonian behavior (shear-thinning) of AFFF foam and obtained data on the form's stability. These experimental data are expected to contribute to enhancing the efficiency of fire suppression systems utilizing AFFF.

Numerical study on the foam spraying for AFDSS applicable to initial fire suppression in large underground spaces (지하대공간 초동 화재진압에 적용가능한 자율형 소화체계의 폼 분사 해석 기법 연구)

  • Park, Jinouk;Yoo, Yongho;Kim, Whiseong
    • Journal of Korean Tunnelling and Underground Space Association
    • /
    • v.23 no.6
    • /
    • pp.503-516
    • /
    • 2021
  • Autonomous fire detection and suppression system requires advanced technology for complex detection technology and injection/control technology for accurate hitting by fire location. Also, foam spraying should be included to respond to oil fires. However, when a single spray monitor is used in common, water and foam spray properties appear different, so for accurate fire suppression, research on the spray trajectory and distance will be required. In this study, experimental studies and numerical analysis studies were combined to analyze the foam spray characteristics through the spray monitor developed for the establishment of an autonomous fire extinguishing system. For flow analysis of foam injection, modeling was performed using OpenFOAM analysis software, and the commonly used foaming agent (Aqueous Film-Forming Foam) was applied for foam properties. The injection distance analysis was performed according to the injection pressure and the injection angle according to the form of the foam, and at the same time, the results were verified and presented through the injection experiment.