The Behavior of Bubble and Water Jet Induced by Underwater Explosion in a Rectangular Tube

Koita, Taketoshi; Zhu, Yujian; Sun, Mingyu

doi:10.2514/6.2011-187

Cited by 6 publications

(7 citation statements)

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“…Then, the axial side of collapsing bubble closest the tube wall is seen decreasing at a different rate from the axial side furthest away. This jet eventually penetrates the inside of the bubble and at the end of the collapse phase, it makes impact on the bottom part of the bubble leading to the formation of a toroidal bubble which seems that eventually breaks into small bubbles (see frame 15). An important point is that the bubble moves towards the closer tube wall similar to a bubble in a free field near a solid boundary.…”

Section: Bubble Is Not At the Center Of The Tube (With Eccentricity)mentioning

confidence: 98%

“…At the beginning stage of the bubble collapse phase the downward jet (second jet) is developed. This jet eventually penetrates the bubble and transforms it into a torus (see frames [13][14][15].…”

Section: Bubble Is At the Center Of The Tube (Without Eccentricity)mentioning

confidence: 99%

“…Miao et al [22] simulated the response of an acoustically excited bubble centered within a deformable microtube using an axisymmetric finite element code coupled to a boundary element code to explore potential damage mechanisms. Koita et al [15] studied experimentally the behavior of a bubble generated by high voltage electronic discharge in a rectangular tube and its interaction with water free surface considering the effects of the voltage and the depth of the discharge.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

“…The bubble evolution growth is not symmetric. Growth phase: frames (1)-(7) and collapse phase: frames (8)-(15). the buoyancy and development of jet are in the same directions for hV up i.…”

mentioning

confidence: 99%

“…The bubble grows and collapses axisymmetrically. Growth phase: frames (1)-(7) and collapse phase: frames (8)-(15).…”

mentioning

confidence: 99%

See 4 more Smart Citations

Experimental study on the dynamics of an oscillating bubble in a vertical rigid tube

Aghdam

Khoo

Farhangmehr

et al. 2015

Experimental Thermal and Fluid Science

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Section: Bubble Is Not At the Center Of The Tube (With Eccentricity)mentioning

confidence: 98%

Section: Bubble Is At the Center Of The Tube (Without Eccentricity)mentioning

confidence: 99%

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

“…The bubble evolution growth is not symmetric. Growth phase: frames (1)-(7) and collapse phase: frames (8)-(15). the buoyancy and development of jet are in the same directions for hV up i.…”

mentioning

confidence: 99%

“…The bubble grows and collapses axisymmetrically. Growth phase: frames (1)-(7) and collapse phase: frames (8)-(15).…”

mentioning

confidence: 99%

See 3 more Smart Citations

Experimental study on the dynamics of an oscillating bubble in a vertical rigid tube

Aghdam

Khoo

Farhangmehr

et al. 2015

Experimental Thermal and Fluid Science

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Investigation of Bubble Collapse and Water Jet Induced by Underwater Explosion in a Rectangular Tube

Koita

Zhu

Sun

2012

28th International Symposium on Shock Waves

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Liquid jets produced by an immersed electrical explosion in round tubes

et al. 2017

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Liquid jets produced by an electrical explosion in water in round, centimeter-wide tubes are investigated experimentally and theoretically. Several jet flow patterns including sharp conical forms and annular forms are observed through high-speed photography. The general features of these patterns are presented and examined herein. It is found that the jet pattern is influenced mainly by the tube diameter, with narrow tubes producing conical jets and wide tubes producing annular jets. The jet maintains a nearly constant velocity, which increases with the explosion energy and decreases with the tube diameter and the standoff distance. A quasi-one-dimensional theoretical model that includes the bubble dynamics is proposed. With the model proposed herein, the effective explosion energy is calibrated first by matching the maximum bubble size. The results show that the confinement imposed by the tube tends to reduce the effective energy and that tubes with smaller diameters collect less effective energy. A theoretical analysis of the jet velocity indicates that the jet has to overcome a threshold energy level to obtain a constant velocity and that in narrower tubes, the jet velocity is amplified. The amplification factor, which is defined as the ratio of the actual jet velocity to the theoretical maximum bulk velocity, generally decreases with the tube diameter. It approaches unity when the jet is annular or blunt, indicating that the kinematic focusing effect with this type of jet is negligible. A parametric analysis of the calibrated explosion energy and the amplification factor provides a relation that comprehensively represents the experimental data. The relation is found to be different from those obtained in previous investigations, and the reasons for this difference are discussed.

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The Behavior of Bubble and Water Jet Induced by Underwater Explosion in a Rectangular Tube

Cited by 6 publications

References 0 publications

Experimental study on the dynamics of an oscillating bubble in a vertical rigid tube

Experimental study on the dynamics of an oscillating bubble in a vertical rigid tube

Investigation of Bubble Collapse and Water Jet Induced by Underwater Explosion in a Rectangular Tube

Liquid jets produced by an immersed electrical explosion in round tubes

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