- Author
-
Takahashi, S.
- Title
- Theoretical Study on the Requirements of Water Application for a Compartment Fire Extinction.
- Coporate
- Fire Research Institute, Tokyo, Japan
- Journal
-
Bulletin of Japanese Association of Fire Science and Engineering,
Vol. 34,
No. 1,
1-5,
1984
- Keywords
-
compartment fires
|
water
|
extinction
|
application rate
|
wood
|
equations
|
model fires
- Abstract
- [ABSTRACT IN ENGLISH] Extinction of a compartment fire is attended with difficulties especially when the compartment interior is wooden and its scale becomes larger. These troubles are brought because the wetted area dries up under intense radiaiton from the surroundings and reignites with the move of the spray nozzle. therefore, the extinction of the whole body is thought to be achieved in the dynamism of local suppression speed and reignition speed. The author formerly gave equation which describes the ignition time of the wet wood ember. Using this equation, dynamic equation was composed for model fires. That is, the fundamental condition for the extinction is given by [equation]. The necessary water application rate, W, quantity of water required, Me, and necessary density of the soaked water, x, are calculated as a function of room size and fire temperature, and compared with actual experience as well as experimental data. The theoretically derived curve not only agreed well with the experiment, but also could explain generally recognized requirements of the water application.