make the discrepancy in the volume almost 
negligible, while it would not seriously affect the 
impulse 
error of 
2 See Ae fami 
maximum. Explosive: TNT; charge depth: 500 ft. ; distance from center of charge: R= W1/0.352; @=time 
UNDERWATER EXPLOSION PHENOMENA 
le a 
Ngetmpadsel 
BENS 
MAS lab 
fc ire i 
me 
(ia 
faa 
an 
IN 
(ial NG 
al 
Ee] 
se 
as 
He 
CHE 
(eo) ORR Rr fim 
a | ea | ed CR Ea | Daa | 
° so 100 150 200 
Fic. 9. Afterflow energy flux, impulse, and total particle velocity versus time to instant of first 
bubble maximum. Explosive: TNT; charge depth: 250 ft.; distance from center of charge: 
R=W3/0.352; @=time constant of initial shock-wave decay. 
1149 
531 
For these reasons it is impossible to say whether 
the discrepancy is due to inaccuracies in inter- 
and afterflow energies, and a base line preting the experimental results or to inadequacy 
this magnitude could easily be present.) of the acoustic approximation. 
PARTICLE 
VELOCITY 4— 
fat 
Ey 
Pe cr 
° 20 60 75 100 126 180 
REDUCED TIME T* '~ 
Fic. 10. Afterflow energy flux, impulse, and total particle velocity versus time to instant of first bubble 
constant of initial shock-wave decay. 
