scholarly journals Numerical Investigation of Rock Breaking Mechanism With Supercritical Carbon Dioxide Jet by SPH-FEM Approach

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 55485-55495 ◽  
Author(s):  
Chun Yang ◽  
Jianhua Hu ◽  
Shaowei Ma
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Numerical Investigation ◽  
Rock Breaking ◽  
Breaking Mechanism ◽  
Supercritical Carbon

scholarly journals Dynamic simulation of the oscillation characteristics of supercritical carbon dioxide impacting jets

2018 ◽  
Vol 25 (1) ◽  
pp. 61-71 ◽  
Author(s):  
Xinwei Zhang ◽  
Yiyu Lu ◽  
Jiren Tang ◽  
Zhe Zhou ◽  
Qian Li
Keyword(s):  
Carbon Dioxide ◽  
Numerical Model ◽  
Supercritical Carbon Dioxide ◽  
Oscillation Frequency ◽  
High Speed ◽  
Rock Breaking ◽  
Target Distance ◽  
Inlet Pressure ◽  
Oscillation Characteristics ◽  
Supercritical Carbon

A numerical model was established to investigate the dynamic oscillation characteristics of supercritical carbon dioxide (sc-CO2) impacting jets. The jet hydrodynamics, heat transfer, and physical properties of sc-CO2 fluid were incorporated into the model. The coupling of multiple fields with large velocity and pressure gradients was achieved using a modified SIMPLE segmentation algorithm. Laboratory experiments validated the reliability of the numerical model by detecting dynamic changes in the pressure on the centerline of the sc-CO2 impacting jet. Analysis of the flow field showed single or double high-speed sc-CO2 mass structures for the sc-CO2 impacting jet, revealing the generation mechanism of the impacting oscillation frequency and the mechanism of improved rock-breaking efficiency by sc-CO2 jet. The oscillation frequency equation was obtained through a quantitative treatment of the velocity and motion area of the sc-CO2 mass. Finally, the equation and simulation results were used to analyze the influences of the target distance, inlet pressure and temperature on the sc-CO2 jet oscillation characteristics. The results showed that the oscillation frequency and amplitude first increased and then decreased with increases in the target distance. The oscillation frequency and amplitude both increased with increasing inlet pressure; the oscillation frequency increased slowly with increasing temperature.

Experiment on rock breaking with supercritical carbon dioxide jet

2015 ◽  
Vol 127 ◽  
pp. 305-310 ◽  
Author(s):  
Haizhu Wang ◽  
Gensheng Li ◽  
Zhonghou Shen ◽  
Shouceng Tian ◽  
Baojiang Sun ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Rock Breaking ◽  
Supercritical Carbon

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

2021 ◽  
Vol 48 (6) ◽  
pp. 1450-1461
Author(s):  
Mukun LI ◽  
Gang WANG ◽  
Weimin CHENG ◽  
Shijie PU ◽  
Hongjian NI ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Rock Breaking ◽  
Coupling Mechanism ◽  
Supercritical Carbon
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