Shock wave focusing in water inside convergent structures

Wang, Chuanxi; Eliasson, Veronica

doi:10.1260/1750-9548.6.3.267

Cited by 19 publications

(11 citation statements)

References 26 publications

(38 reference statements)

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“…The gas gun and the visualization system have been presented with details elsewhere [6], and will be only briefly introduced here. The gas gun with a 1.8 m long and 0.05 m diameter barrel is used to launch cylindrical projectiles onto the experimental specimen.…”

Section: Experimental Setup and Resultsmentioning

confidence: 99%

Interaction between Shock Waves in Water and Convergent Structures of Finite Thickness

Wang

Eliasson

2015

29th International Symposium on Shock Waves 2

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Section: Experimental Setup and Resultsmentioning

confidence: 99%

Interaction between Shock Waves in Water and Convergent Structures of Finite Thickness

Wang

Eliasson

2015

29th International Symposium on Shock Waves 2

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“…The underwater shock waves in this study are generated using the same experimental setup and technique as reported in our earlier studies (Wang and Eliasson, 2012;Wang et al, 2014). A shock wave in the convergent water-filled section of the specimen is generated by a projectile launched from a gas gun.…”

Section: Methodsmentioning

confidence: 99%

Investigation of shock wave focusing in water in a logarithmic spiral duct, Part 2: Strong coupling

et al. 2015

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a b s t r a c tUnderwater explosions near submerged marine structures can lead to severe conditions and subsequent damage, particularly if the geometry of the solid structure leads to shock focusing of the incident shock wave. In order to understand the dynamic response of submerged marine structures subjected to underwater explosions it is important to understand the fluid-structure coupling that occurs during the shock focusing event. In this paper, experiments and numerical simulations of shock focusing in thin water-filled convergent structures are conducted to study the fluid-structure interaction and the dynamic response of the surrounding structure. Three types of materials have been investigated: 1018 steel, 6061 aluminum and a 16-layer carbon-fiber-reinforced epoxy composite. Two different thicknesses of the steel and aluminum specimens have been used: 1.3 mm and 5.8 mm. The carbon fiber specimen was 5.8 mm thick, with the same weight as the 1.3 mm thick steel specimen. Results show that the type of material, its geometry, and its thickness play a substantial role in determining the fluid-structure interaction during and after the shock focusing event.

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“…High temporal resolution was obtained using a z-folded schlieren setup (Wang & Eliasson 2012) with a high-speed camera (Phantom V711) and a high-power lightemitting diode (Cree XLamp, XP-G2 LEDs, Cool white). Schlieren visualization was used instead of shadowgraph to avoid any inherent ambiguity from the shadow images.…”

Section: Schlieren Visualization With High Temporal Resolutionmentioning

confidence: 99%

Numerical and experimental investigation of oblique shock wave reflection off a water wedge

et al. 2017

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Shock wave interaction with solid wedges has been an area of much research in past decades, but so far, very few results have been obtained for shock wave reflection off liquid wedges. In this study, numerical simulations are performed using the inviscid Euler equations and the stiffened gas equation of state to study the transition angles, reflection patterns, and triple point trajectory angles of shock reflection off solid and water wedges. Experiments using an inclined shock tube are also performed and schlieren photography results are compared to simulations. Results show that the transition angles for the water wedge cases are within 5.3% and 9.2%, for simulations and experiments respectively, compared to results obtained with the theoretical detachment criterion for solid surfaces. Triple point trajectory angles are measured and compared with analytic solutions, agreement within 1.3• is shown for the water wedge cases. The transmitted wave in the water observed in the simulation is quantitatively studied, and two different scenarios are found. For low incident shock Mach numbers, M s = 1.2 and 2, no shock wave is formed in the water but a precursor wave is induced ahead of the incident shock wave and passes the information from the water back into the air. For high incident shock Mach numbers, M s = 3 and 4, precursor waves no longer appear but instead a shock wave is formed in the water and attached to the Mach stem at every instant. The temperature field in the water is measured in the simulation. For strong incident shock waves, e.g., M s = 4, the temperature increment in the water is up to 7.3K.

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Shock wave focusing in water inside convergent structures

Cited by 19 publications

References 26 publications

Interaction between Shock Waves in Water and Convergent Structures of Finite Thickness

Interaction between Shock Waves in Water and Convergent Structures of Finite Thickness

Investigation of shock wave focusing in water in a logarithmic spiral duct, Part 2: Strong coupling

Numerical and experimental investigation of oblique shock wave reflection off a water wedge

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