A New Measurement Based on HPB to Measure the Wall Pressure of Electric-Spark-Generated Bubble near the Hemispheric Boundary

Table 1

Acquisition time of initial stress wave and stress reflection wave in the first collapse of bubbles: ① 1^st IW is the time of first incident wave signal; ② 1^st RW is the time of the first reflected wave signal; ③ 2^nd RW is the time of the second reflected wave signal; ④ 3^rd RW, 4^th RW, and so on are the same as before.

	1^st IW (t1)	1^st RW (t2)	2^nd RW (t3)	3^rd RW (t4)	4^th RW (t5)	5^th RW (t6)	6^th RW (t7)
t (ms)	5.968	6.852	6.925	7.808	7.882	8.766	8.839
		Δt1	Δt2	Δt3	Δt4	Δt5	Δt6
Δt (ms)	—	0.884	0.073	0.883	0.074	0.884	0.073