Results 21 to 30 of about 28,279 (257)

Study on the optimal parameter matching model of rotary cutting coal-rock for abrasive water jet

Meitan kexue jishu
As coal mining extends deeper, pure water jet technology is gradually unable to meet the demand for coal penetration enhancement under high stress and high coal rock strength conditions.
Jianping WEI, Pengwei XIAO, Huidong ZHANG, Changjiang CHEN, Yong LIU   +4 more
doaj   +1 more source

Transient Calculation Studies of Liquid–Solid Collision in Jet Descaling

Energies, 2022
Sichuan is gradually being transformed and is utilizing groundwater and thermal resources. However, this investigation found that the high mineralization rate of geothermal resources in the Sichuan Basin is common and efficient, and environmentally ...
Shu Hu, Zhaohui Teng, Shan Huang, Na Li, Qulan Zhou   +4 more
doaj   +1 more source

Preliminary study on occurrence of composite material delamination processed by abrasive water jet cutting

MATEC Web of Conferences, 2017
The paper presents a preliminary experimental study on processing composite materials (CFRP) using abrasive water jet cutting (AWJC) process, analysing the possibilities of occurrence of material delamination.
Popan Ioan Alexandru, Bâlc Nicolae, Popan Alina Ioana   +2 more
doaj   +1 more source

Study on the Erosion Morphology of Cohesive Soil under the Vertical Impact of a High-Pressure Moving Water Jet

Applied Sciences, 2022
In the in situ leaching process of ionic rare earth ore, high-pressure moving water jet technology has been applied to improve floor leakage problems.
Jian Liu, Xiongdong Lan, Guanshi Wang, Sihai Luo, Zhipeng Yang   +4 more
doaj   +1 more source

Progress on the hydraulic measures for grid slotting and fracking to enhance coal seam permeability

International Journal of Mining Science and Technology, 2017
A method of hydraulic grid slotting and hydraulic fracturing was proposed to enhance the permeability of low permeability coal seam in China. Micro-structural development and strength characteristics of coal were analysed to set up the failure criterion ...
Yiyu Lu, Zhaolong Ge, Feng Yang, Binwei Xia, Jiren Tang   +4 more
doaj   +1 more source

A Numerical Simulation of the Underwater Supersonic Gas Jet Evolution and Its Induced Noise

Applied Sciences, 2023
To explore the complex flow field and noise characteristics of underwater high-speed gas jets, the mixture multiphase model, large eddy simulation method, and Ffowcs Williams–Hawking (FW–H) acoustic model were used for simulations, and the numerical ...
Wei Yu, Baoshou Wang, Chun Zhang
doaj   +1 more source

Molecular characterization of covRS mutations in M1UK Streptococcus pyogenes

FEBS Open Bio, EarlyView.
Group A Streptococcus (GAS) acquires covRS mutations driving a hypervirulent bacterial state, frequently associated with invasive disease‐like necrotizing fasciitis. We demonstrate that the newly emerged M1UK GAS lineage can also acquire these mutations.
Jarrad Pritchard, Emma‐Jayne Proctor, Jiawa Wang, Nikolas P. Johnston, Andrew Hayes, Georgia McCorkell, Haibo Yu, Jai Tree, Mark R. Davies, Mark J. Walker, Ronald Sluyter, Stephan Brouwer, Martina L. Sanderson‐Smith   +12 more
wiley   +1 more source

Influence of Processing Parameters on Coating Removal for High Pressure Water Jet Technology Based on Wall-Climbing Robot

Applied Sciences, 2020
The shipbuilding industry is very important for many countries. As an essential process in the shipbuilding industry, surface preparation (or coating removal) is gaining more and more attention.
Feifei Zhang, Xuerong Sun, Zhanpeng Li, Imran Mohsin, Yanan Wei, Kai He   +5 more
doaj   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Influence of Test Temperature and Test Frequency on Fatigue Life of Aluminum Alloy EN AW‐2618A

Advanced Engineering Materials, EarlyView.
The influence of test temperature and test frequency on the fatigue life of EN AW‐2618A is investigated. High‐cycle fatigue tests are performed at different test temperatures and frequencies on the 1000 h/230°C overaged state. Both test parameters reduce fatigue life due to time‐dependent damage mechanisms.
Ying Han, Julian M. Rosalie, Jan Radners, Mauro Madia, Philipp von Hartrott, Birgit Skrotzki   +5 more
wiley   +1 more source