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Article
Engineering, Geological
Zhaolong Ge et al.
Summary: It has been found that the efficiency and effect of rock breaking by repeated cutting using abrasive water jet are related to the ratio of cutting speed to cutting times. With the increase of horizontal stress, the cutting surface becomes rougher, resulting in increased roughness and energy consumption. However, the repeated cutting method can achieve the best breaking effect and efficiency under certain conditions.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Engineering, Marine
Tengfei Cai et al.
Summary: The impact of feeder pipe geometry on self-excited cavitating waterjets (SECJ) and its erosion patterns is studied through laboratory experiments. Averaged governing equations are used to inspect the bulk flow in the feeder sections. The results show that the length of the feeder pipe, L2, affects the acoustic characteristics of the waterjets. The formation of a large-scale recirculation pattern in the feeder section is influenced by the length and results in changes in resonance and reflectivity. This work provides insight into designing pipe system parameters to modulate peak resonance.
Article
Energy & Fuels
Xiao-Ya Wu et al.
Summary: In this study, the pressure, velocity, and cavitation field characteristics of organ-pipe cavitating jet (OPCJ) were analyzed using computational fluid dynamics (CFD) method. The preferred values of divergent angle, throat length, and divergent length were found to be 15 degrees, 1d, and 3d, respectively, under specific simulation conditions. The OPCJ exhibited higher efficiency and lower energy consumption compared to conical jet (CJ) in eroding gas hydrate-bearing sediments (GHBS). During the impinging process, the OPCJ generated stronger impact pressure, turbulence effect, chambering effect, and bottom cleaning ability than CJ. This study provides insights into the potential field applications of OPCJ and CJ in natural gas hydrate exploitation.
Article
Engineering, Geological
Shirong Cao et al.
Summary: This study investigates the rock-breaking mechanism and pore structure evolution of typical reservoir rocks under ultra-high pressure water jet (UHP-WJ) impingement. The results show that different types of rocks exhibit different fracture mechanisms and pore structure evolutions under UHP-WJ impact. These findings provide important theoretical references for optimizing the development of unconventional natural gas reservoirs.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2022)
Article
Thermodynamics
Shuangjie Xu et al.
Summary: This study experimentally investigated the shedding mechanisms and characteristics of sheet/cloud cavitation in an axisymmetric venturi tube under different flow conditions. The results showed that the combination of shock waves and re-entrant flow caused the shedding and collapse of cavitation. The relationships for predicting cavity lengths and shedding frequency were proposed. The proper orthogonal decomposition (POD) method was used to extract feature information and reduce complexity.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2022)
Review
Engineering, Industrial
Hitoshi Soyama et al.
Summary: Mechanical surface modification techniques, such as shot peening, can improve the fatigue properties of metals and other materials. Cavitation peening is a special variation of shot peening that offers the advantage of lower surface roughness and no solid collisions. Understanding both fluid dynamics and materials science is necessary for grasping the mechanisms of cavitation peening. This comparative review presents key insights and achievements, comparing water jet, pulsed laser, and ultrasonic cavitation peening with traditional shot peening.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Engineering, Marine
Xiao Zhong et al.
Summary: This paper proposes a novel ultrasonic-enhanced submerged cavitation jet method for cleaning ship fouling. Through experimental results, the feasibility of this method is verified, indicating that the mass loss of samples increases greatly when the submerged cavitation jet is combined with ultrasonic.
Article
Mechanics
Ziyang Wang et al.
Summary: In this study, a two-way coupling Eulerian-Lagrangian approach is developed to assess the cavitation erosion risk in an axisymmetric nozzle. The results show that the new method can accurately predict the location and value of the potential maximum cavitation erosion risk. It is also found that the high risk of cavitation erosion is mainly due to the oscillation and collapse of near-wall bubbles.
Article
Mechanics
A. A. Aganin et al.
Summary: This study investigates the dynamics of a bubble near a local axisymmetric convexity or concavity on a plane rigid wall under the formation of a cumulative liquid jet directed towards the wall. The main focus is on the bubble collapse characteristics at the moment of jet impact, including the jet tip velocity and radius, internal bubble pressure, distance between the bubble and the uneven region of the wall, etc. These characteristics play a significant role in determining cavitation's destructive potential. The study explores the dependencies of these characteristics on various factors, such as the radius of the non-plane wall region, depth of the concave region, height of the convex region, and the local character of the wall unevenness.
Article
Engineering, Marine
Peng Chi et al.
Summary: This study investigates the feasibility of using a cavitation jet for drilling and stimulating shale gas reservoirs, and conducts erosion experiments on shale under different hydraulic conditions. The study finds that the optimal nozzle position increases linearly with upstream pressure, and a higher upstream pressure results in a greater erosion rate. The study also discusses the erosion mechanism and the impact of erosion time on reservoir permeability.
Article
Engineering, Electrical & Electronic
Gaowei Wang et al.
Summary: In this paper, the effect of organ pipe nozzles on cavitation behavior of submerged high-pressure jet was studied. Experimental and numerical simulation results showed that the organ pipe nozzle can improve the cavitation performance of the jet and generate stronger small-scale vortices and more severe cavitation.
Article
Engineering, Chemical
Chi Peng et al.
Summary: The experiments showed that ultrasonic cavitation erosion of reservoir rocks in a solution containing SiO2 micro-abrasives can accelerate the erosion speed and extent, attributed to the synergistic effect of cavitation and micro-abrasives. During the erosion process, multiple micro-fractures and pores are generated on the rock surface, increasing the permeable channels for fluid flow.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Engineering, Geological
Tianwen Jiang et al.
Summary: The threshold pressure of sandstone in water jet drilling is crucial for maximizing oil productivity. This study reveals that the threshold pressure is strongly related to the compressive strength of the rock, while porosity and permeability have a minimal impact. Different nozzles have varying effects on the threshold pressure, which is correlated with the mechanism of rock breaking by water jet.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2021)
Article
Engineering, Marine
Tengfei Cai et al.
Summary: The experimental study investigated the effects of ambient pressure on the frequency characteristics of self-excited cavitating waterjet (SECJ) under different operating conditions and nozzle resonant chamber geometries. The results suggest that ambient pressure influences the self-excited frequency, modulating the frequency characteristics by altering the Strouhal number. This can be predicted using a power function relationship between dimensional parameters and may guide system optimization under high ambient conditions.
Article
Mechanics
Chi Peng et al.
Summary: The shedding frequency of the cavitation cloud in a submerged cavitation jet is accurately determined using spectral analysis and proper orthogonal decomposition (POD). The optimal parameter for determining the shedding frequency is found to be the line-averaged gray level. A power law correlation between the shedding frequency and a revised Reynolds number is established, validated by experimental data. The study also shows the periodic feature of the cavitation cloud in the jet through the analysis of POD modes.
JOURNAL OF HYDRODYNAMICS
(2021)
Article
Mechanics
Yunqing Liu et al.
Summary: This study investigates the dominant coherent structures in cavitating flow around a Clark-Y hydrofoil using data-driven modal decomposition methods (POD and DMD) and explores the interaction between cavitation and vortex. The results show that the main coherent structures include large-scale cavity-vortex, re-entrant jet, shear layer, and small-scale vortex in the wake, and the flow field can be reconstructed from the most energetic POD or DMD modes.
Article
Thermodynamics
Tengfei Cai et al.
Summary: In this experimental study, the effects of various axisymmetric orifice geometries on jet characteristics at Reynolds number of approximately 10^5 were explored. The thickness and divergence angle of the orifices were found to impact velocity profiles and mixing rates in the near region, highlighting the influence of geometry on turbulent structures and flow behavior.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2021)
Article
Engineering, Mechanical
Sarah Jasper et al.
Summary: This study investigated the impact of increasing ambient pressure on water jet characteristics in submerged drilling conditions. Differences in cavitation and non-cavitation regimes were observed, showing the need for adjustments in nozzle geometries and operation conditions for technology transfer from water jet cutting to submerged jet drilling.
EXPERIMENTS IN FLUIDS
(2021)
Article
Mechanics
Silvestre Roberto Gonzalez-Avila et al.
Summary: In this study, acoustic transients emitted during the collapse of laser-induced cavitation bubbles were analyzed systematically for different standoff parameters. Experimental and numerical results were used to investigate the impact of various parameters on the characteristics of the acoustic signals. It was found that the pressure peaks in the acoustic signals and the amplitude ratio of the first to second acoustic transients are related to the bubble nucleation place and the standoff parameter, gamma.
Article
Engineering, Chemical
Sarah Jasper et al.
Summary: Water jetting, a cost-effective drilling method for geothermal reservoir exploration, is analyzed under submerged and pressurized conditions using high-speed shadow imaging, particle image velocimetry, and rock erosion analysis. The experiments demonstrate that nozzle cavitation and cloud cavitation are crucial for the jetting process and material erosion control.
CHEMIE INGENIEUR TECHNIK
(2021)
Article
Mechanics
Yunqing Liu et al.
Summary: This paper investigates sheet/cloud cavitation dynamics in fluid-structure interaction through experimental and numerical methods, revealing enhanced vibration amplitudes in flexible hydrofoils when cloud cavitation occurs. Various methods are used to analyze the dominant coherent structures in the cavitating flow.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2021)
Article
Energy & Fuels
Tengfei Cai et al.
Article
Thermodynamics
Tengfei Cai et al.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2020)
Article
Thermodynamics
Tengfei Cai et al.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2020)
Review
Chemistry, Multidisciplinary
Hitoshi Soyama
APPLIED SCIENCES-BASEL
(2020)
Article
Engineering, Mechanical
Ezddin Hutli et al.
ENGINEERING FAILURE ANALYSIS
(2019)
Article
Engineering, Mechanical
Nobuyuki Fujisawa et al.
Article
Engineering, Marine
Chi Peng et al.
Article
Engineering, Mechanical
Can Kang et al.
Article
Engineering, Mechanical
Deng Li et al.
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
(2018)
Article
Mechanics
Graham Riches et al.
Article
Thermodynamics
Haixia Liu et al.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2017)
Article
Engineering, Geological
Shouceng Tian et al.
ROCK MECHANICS AND ROCK ENGINEERING
(2017)
Article
Engineering, Geological
Yong Liu et al.
ROCK MECHANICS AND ROCK ENGINEERING
(2016)
Article
Engineering, Mechanical
Li Deng et al.
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2016)
Article
Energy & Fuels
Zhenguo He et al.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2016)
Article
Mechanics
Hitoshi Soyama
JOURNAL OF FLUID SCIENCE AND TECHNOLOGY
(2014)
Article
Engineering, Mechanical
Michael M. Wright et al.
EXPERIMENTS IN FLUIDS
(2013)
Article
Engineering, Mechanical
Ezddin A. F. Hutli et al.
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME
(2008)
