Results 1 to 10 of about 81,954 (316)

Experimental study on the effect of impact target distance on coal breaking efficiency of high-pressure gas–liquid two-phase jet [PDF]

open access: yesScientific Reports
The effective impact target distance is one of the key parameters determining whether high-pressure gas–liquid two-phase jet technology can be applied in underground coal breaking and permeability enhancement projects. To investigate the effect of target
Yang Li
doaj   +2 more sources

Influence of Complex Load on the Strength and Reliability of Offshore Derrick by Using APDL and Python

open access: yesApplied Sciences, 2022
In an offshore operational environment, complex loads such as the hook load, stand load and wind load play a crucial role in the structural strength and reliability of the offshore derrick. Previous studies have mainly focused on the effect of a specific
Zhengbo Tan   +5 more
doaj   +1 more source

Composite rock-breaking of high-pressure CO2 jet & polycrystalline-diamond-compact (PDC) cutter using a coupled SPH/FEM model

open access: yesInternational Journal of Mining Science and Technology, 2022
CO2 drilling is a promising underbalance drilling technology with great advantages, such as lower cutting force, intense cooling and excellent lubrication.
Can Cai   +4 more
doaj   +1 more source

Experimental study on construction parameters of collapsible loess foundation treated by vibrating rod compaction method

open access: yesYantu gongcheng xuebao, 2021
In order to determine the construction parameters of the vibrating rod compaction method to treat the collapsible loess foundation, the self-developed vibrating rod compaction method equipment is used to carry out field tests on the collapsible loess ...
ZENG Biao 1, 2, ZHANG Ding-wen 1, 2, LIU Song-yu 1, 2, YANG Yong 3, ZHANG Kun 4, WANG Jia-le 4, DU Guang-yin 1
doaj   +1 more source

Heat-fluid-solid coupling mechanism of supercritical carbon dioxide jet in rock-breaking

open access: yesPetroleum Exploration and Development, 2021
Aiming at the synergistic rock-breaking mechanism of supercritical carbon dioxide (SC-CO2) jet pressure and temperature difference, a heat-fluid-solid calculation model of rock-breaking stress was established and verified to be effective, and the ...
Mukun LI   +5 more
doaj   +1 more source

Comparison of jet injection technique with conventional injection technique in patients undergoing endodontic therapy

open access: yesContemporary Clinical Dentistry, 2021
Background: In order to reduce the fear and anxiety of injection during root canal procedures, Madajet injection technique was substituted for the first time among the adult patients to obtain its efficacy and to overcome the painful procedure during the
Mahaboob Shahul Hameed   +4 more
doaj   +1 more source

Effect of abrasive water pressure on the surface layer characteristics of duplex stainless steel 2205

open access: yesMaterials Research Express, 2023
The martensitic stainless steel shot with a high number of cycles was applied to the abrasive water jet (AWJ) to study the effect of jet pressures on the surface layer characteristics of 2205 duplex stainless steel.
Jiawei Liu   +4 more
doaj   +1 more source

Flow Characteristics and Parameter Influence of the Under-Expansion Jet on Circulation Control Airfoil

open access: yesEnergies, 2023
The enhancement in the jet pressure ratio and jet velocity contributes to expanding the control efficiency and control boundary of circulation control airfoil under high subsonic incoming flow. However, because of an excessive jet pressure ratio, the jet
Meng He, Liu Zhang, Chang Li, Lei Zhao
doaj   +1 more source

Chaos in atmospheric pressure plasma jets [PDF]

open access: yes2011 Abstracts IEEE International Conference on Plasma Science, 2011
We report detailed characterization of a low-temperature atmospheric-pressure plasma jet that exhibits regimes of periodic, quasi-periodic and chaotic behaviors. Power spectra, phase portraits, stroboscopic section and bifurcation diagram of the discharge current combine to comprehensively demonstrate the existence of chaos, and this evidence is ...
J L Walsh, F Iza, N B Janson, M G Kong
openaire   +2 more sources

High-Pressure Methane Jet: Analysis of the Jet-Obstacle Interaction [PDF]

open access: yesProceedings of the 29th European Safety and Reliability Conference (ESREL), 2019
The study of unplanned high-pressure gas releases is of paramount importance in the industrial safety framework because of the possible large consequences, both in case of flammable and toxic substances leakage. In addition, if an obstacle is involved in the release, it is known that the main effect on the jet behavior is the enhancement of the risk ...
Colombini C., Busini V.
openaire   +2 more sources

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