Page 46 - 201805

628 2018 年 9 月

92%

ᄈѬඋ
83% 100%
58%
90%
38%
80%
36%
70%
34% 33%
60%
50%
40%
0 mm 30% 0 mm
20%
3 mm 10% 4 mm
0%
0 1 2 3 4 0 1 2 3 4 5
௑ᫎ/s ௑ᫎ/s
图 28 空化面积随薄层厚度和时间的变化 (f = 40 kHz)
Fig. 28 Variation of cavitation area with liquid layer thickness and time (f = 40 kHz)

图 29 空泡的碎裂 (f = 20 kHz)
Fig. 29 Fragmentation of cavitation bubbles (f = 20 kHz)

图 30 空泡的聚合 (f = 20 kHz)
Fig. 30 Coalescence of cavitation bubbles (f = 20 kHz)
30

20
ቇจ஝

10

0
0 3 6 9 12 15
ևర
图 31 空泡群中空泡数的变化 (f = 20 kHz)
Fig. 31 Variation of bubble number for a cavitation cluster (f = 20 kHz)