1001 
Table II. Summary of results of studies of cavitation from simulated free plates. 
Fig. Film Ingide Thick- Radius Charge Charge- Time R.(cale) R.(obs.) x,(obs) t,, (calc) t,(obs) 
No. No. Radius ness of of disk Weight plate  Con- v Yin.) (in.)  (fn.)  (Sicro- (micro- 
of pipe disk (in. ) (g dis- stant Q° radius Length pec) sec) 
eae (in. ) tance of aS of cavi- of cavi- 
(in. ) Shock vy) tation tation 
Wave - region region 
6 (mice ge 
rosec) 
T71 2.78 0154 1.65 25 24 32 1.59 1.98 1.5 2.0 47 48 
79 . LJ \ 150 Ld 44 2.19 1.78 1.5 24 56 53 
30 «680 iN a 1.00 W a 44 2.19 1.78 1.9 2.6 58 59 
83 1.78 L 1.65 25 12 24 1.20 1.12 alsal 1.8 42 46 
31 85 ® a ul 150 24 44 2.19 0.78 0.6 3.2 69 76 
32 «88 2.63 0255 2.33 LJ i 44 ales b} 1.46 alex 1.25 47 48 
93 1.55 +154 1.38 LU u 44 2.19 0.55 0.3 --- ? 66 
95 1.55 M2 250 LI 51 2.54 0.46 None --- No 74 
Cav. 
97 1.79 ~382 1.66 150 ® 44 0.88 0.48 0.3 1.8 59 67 
9 " " a ® * 44 0.88 0.48 0.5 2.5 72 81 
100 1.55 190 1.38 u Wl 44 1.78 0.48 0.3 2.4 58 59 
201 2.63 »502 2.47 25 12 24 0.37 1.80 ail 3.0 78 78 
202 1.80 382 1.76 250 24 51 1.02 0.33 0.2 2.8 76 85 
203 1.55 -190 1.34 W W 51 2.06 0.37 None --- 
204 1.80 1.06 1.63 " ul 51 0.37 0.04 None --- No 96 
Cav. 
214 1.60 0.150 1.55 25 12 24 1.20 0.95 0.90 2.2 48 54 
330216 " n Gi ® 24 1.20 0.95 1.0 1.2 4 38 
Table III. Experimental conditions applying to the photographs of Figs, 39 - 49. 
Target, .002 in. air-backed brass diaphragm over end of 6 in, pipe. 
Cavitation produced by 25 g loose tetryl charge. 
Distance from target to cavitation producing charges, 12 in. 
Auxiliary charge and shock-wave data Approximate time 
interval between 
Figure Charge Charge to Calc. Peak Calc. time impact of cavita- 
Number Weight shock wave press constant tion producing 
(g distance  (1b/in.*)  (m‘crosec) eee 
39 None 5 
40 None 125 
41 None 175 
42 None 225 
43 None 400 
44 25 20.5 4400 30 125 
45 150 40. 4000 49 235 
46 150 35. 4600 48 125 
47 250 44. 44,00 60 125 
48 250 14.5 13000 L5 125 
49 25 35.5 2500 35 90 
27 15518 
