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This article is cited in 3 scientific papers (total in 3 papers)
Dependence of cavitation bubble impact onto a body on liquid pressure
A. A. Aganin, T. S. Guseva, L. A. Kosolapova, N. A. Khismatullina Institute of Mechanics and Engineering, FRC
Kazan Scientific Center, Russian Academy of Sciences, Kazan,
420111 Russia
Abstract:
The effect produced by liquid pressure during the impact of a
cavitation bubble on the surface of a body was numerically studied.
The liquid under study was water; the material of the body was
copper-nickel alloy; the bubble was initially spherical (radius
$1$ mm), touched the body, and filled with vapor in the saturation
state. The liquid pressure $p_L$ varied from $1$ to $7$ bar. The impact
on the body resulted from the action of a cumulative jet arising on
the surface of the bubble during its collapse. The main attention
was paid to the short-term initial phase of the impact when the
maximum pressure on the wall was of the order of the water hammer
pressure $p_{wh}$, corresponding to a rigid wall. It was shown that
the cumulative jet velocity and radius increase from $115$ to $317$ m/c
and from $38$ to $43\,\mu$m, respectively, with increasing $p_L$.
Throughout the $p_L$ range considered, the initial stage of the
cumulative jet impact developed similarly to the known case of the
spherical drop impact. The body surface pressure first reached the
water hammer pressure level. Then the pressure on the body surface
at the center of the impact domain decreased monotonically, whereas
at the periphery it initially increased to about $2.5 p_{wh}$ and
after that decreased. Initially, the deformations in the body in
the impact center vicinity were elastic at $p_L = 1$ bar and plastic
at $p_L = 4$ and $7$ bar. Then they became plastic at $p_L = 1$ bar.
With increasing $p_L$, the plastic zone significantly increased, its
geometry greatly changed. The jet impact resulted in a circular
micropit appearing on the body surface. With increasing $p_L$, it
became more pronounced.
Keywords:
cavitation, bubble collapse near body, cumulative jet, liquid impact onto body, elastic-plastic body dynamics.
Received: 19.07.2018
Citation:
A. A. Aganin, T. S. Guseva, L. A. Kosolapova, N. A. Khismatullina, “Dependence of cavitation bubble impact onto a body on liquid pressure”, Uchenye Zapiski Kazanskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki, 161, no. 2, Kazan University, Kazan, 2019, 165–180
Linking options:
https://www.mathnet.ru/eng/uzku1510 https://www.mathnet.ru/eng/uzku/v161/i2/p165
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Abstract page: | 213 | Full-text PDF : | 92 | References: | 19 |
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