Page 443 - konishipaper
P. 443
Resultsanddiscusion Experimentforbehaviorofair-dropedwαter
Asaresultofthepre-experiment，theairpresureis0.3MPaandthequantityofwateris300mL wouldbebestconditiontoobserveabehaviorofair-dropedwater.Injectspedbecamequick asthepresureinatankbecamehighpresure.Itcametoberemarkablyinf1uencedbytheair resistancewhilewaterdropingintheair，forwatercolapsingandbecomingsmalwaterdropas thequantityofwaterisreduced.Fig.4.showsvelocityvectordistributionatcroswindvelocity is 5m/s and 16m/s respectively. These behavior of air“ drop ped water is quite similar to the real experimentwiththefire-fightinghelicopter.Fig.5.showsvelocityocurencedistributionat croswindvelocityis5m/sand16m/srespectively.Inthecaseofcroswindvelocityis16m¥s， velocityocurencedistributionisnaturalcomparetothecroswindvelocityis5m/scase.It seemstobesucesfulytoreproduceforthebehaviorofair-dropedwaterfromtheseresults.
35
30
25
認
否 20 G
E
~ 15 g
10
25
20
H
、
~
(a)Croswindsped5m/s (b)Croswindsped16m1s
"' 6、 F04
、 ' "
ン-， -¥
velocity[m1s]
〆 〆 〆 〆 〆 " ' - "'- '" ~ "- ¥.0 -¥. -¥. -¥，p -¥-_0，'"--"'，"i.-"'，六六ヘベベ
。〆〆〆〆戸~~~~-~-~
velocity[m/s]
0
1 1 "'1 1
d'
"- 守司
(a)Croswindsped5m/s
Fig.4.Velocityvectordistribution.
(b)Croswindsped16m/s Fig.5.Velocityocurencedistribution.
50
{式]自民Oヒ500
