Page 430 - konishipaper

368
T Konishieta!./FireSajety]ourna!43(208)363-375
1200，- 10-1
Nε800I. q吋司 600
oArea(60L) l，60 40 • L巴vel(60L)
ロArea(530L)
Buck巴tvolume(Flightaltitude，windsped) ー剛 600L(10-150f，.1 1.5-2.5m1s)
- 5400L(150ft.，8.5-11.0m/s)
10knots/ 15knots，
〆 20knots
e
3OEU U
主 20
<1.l
UωP凶
O
s 400
20 にEちω ω』JF 00 <1.l
b
(1)151ft25kt r-l
873m26.1L1m2 (4)147ft15kt
(2)157ft24kt
808m26.6L1m2 (5)160ftOkt
(3)149ft20kt
743m27目 1L1m2
「i l l l l /L斗 LJLJ l1111111 ¥LJLJLJ
「「
LJ
137m236.5L1m2
10 10 OO
200
Fig. 5. The cor relations between airspe ed，coverage area and coverage levelforthemid-sizehelicoptersandlargeh巴licopters.Thecoveragelevel
gal lon and Grif fith 10 0 0-gal lon buckets with the changesofBambi324
司
airspedchangeareincluded.
timeisdrawn，asshowninFigs.1and12.Thiswilbe mentionedinmoredetaillater.
3.2. Temperaturechan.ges01themock叫 phouses
Fig.7(a)showsthetemperaturechangesofthecenter house A3 after ignition until the fire was extinguished. Symbolplus(十)showsthatdroppedwaterhitthecenter houseA3.Thefourtrianglesymbolsshowwinddirections towardthehouseA3fromareaswherewaterwasdroped.
O
、¥
Cov巴rag巴 area(m2)
O 10 20 30 40 50 Flightsped(knots)
O Fig.6.Therelationbetweencoverageareaandcoverage1巴V巴1expresed
614m28.6L1m2
Fig.4. (Continued)
l
|園 Level(530L) |ト 50 A Level(Bambi126L)
• Level(Grifitb3785L)
40もJ
Flightsped
吋
。 にJ
〉
30
200
400 600 800
byEqs.(5)and(6)withtheairspedasparameters.
Symboltriangle(ム)， solidtriangle(企)， invertedtriangle (¥7) and solid inverted triangle (T) represent upwind， downwind，right-sidewind and left-sidewind respectively. The Ch-1，Ch-2 and Ch-3 are thermocouples，which measurethetemperatureofthehousesataheightof50， 10，and170cmfromtheground.Thedurationofthefire wasdividedintothefolowingthrestagesbyanalyzingthe infraredandvideoimages:(1)thefireexpansionstagefrom ignitionuntilthefirespreadsintothewholehouse;(2)the firematurestageinwhichthefirecontinuesburningstably
NE¥J)