scholarly journals A study on the dust control effect of the dust extraction system in TBM construction tunnels based on CFD computer simulation technology

2019 ◽  
Vol 30 (10) ◽  
pp. 2059-2075 ◽  
Author(s):  
Qiang Liu ◽  
Wen Nie ◽  
Yun Hua ◽  
Lebin Jia ◽  
Chongshan Li ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Dust Control ◽  
Extraction System ◽  
Simulation Technology ◽  
Control Effect ◽  
Dust Extraction

scholarly journals Using Computers to Discover Materials That Generate Non-polluting Fuels

2021 ◽  
Vol 9 ◽  
Author(s):  
Santu Biswas ◽  
Maytal Caspary Toroker
Keyword(s):  
Computer Simulation ◽  
Fossil Fuels ◽  
Environmental Problems ◽  
Simulation Technology ◽  
Clean Fuel ◽  
Clean Fuels ◽  
Process Computer

Non-polluting fuels, such as hydrogen, are widely considered to be a promising way to decrease the environmental problems caused by the burning of fossil fuels. Finding materials that can help us to generate these “clean” fuels is a difficult and time-consuming process. Computer simulation technology is the most important tool in this area, because it helps scientists to understand existing materials and can also help them to design new types of materials. In this article, we explain how certain materials can help us to produce hydrogen, a clean fuel, from water, and we also describe how computer simulation technology can offer a route for the discovery of new efficient materials.

scholarly journals CFD-Based Determination of the Optimal Blowing and Suction Air Volume Ratio of Dual-Radial Swirl Shielding Ventilation in a Fully Mechanized Excavation Face

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Kuan Wu ◽  
Shiliang Shi ◽  
Yijie Shi ◽  
Yong Chen
Keyword(s):  
Ventilation System ◽  
Volume Ratio ◽  
Simulation Method ◽  
Dust Concentration ◽  
Dust Control ◽  
Underground Mines ◽  
Physical And Mental Health ◽  
Control Effect ◽  
Air Curtain ◽  
Air Volume

Dust is one of the main pollutants in coal mines, which seriously affects the physical and mental health of workers, as well as the safe production in underground mines. Dual-radial swirl shielding ventilation is a new ventilation method for a fully mechanized excavation face and can effectively reduce the dust concentration in the underground. The dust control effect of dual-radial swirl shielding ventilation is mainly affected by the thickness and integrity of the shielding air curtain, as well as the disturbance of the flow field near the air curtain. By changing the blowing and suction air volume ratio of the air duct, the strength of the radial air curtain can be improved, and the dust control effect of the dual-radial swirl shielding ventilation system can be effectively improved. In order to determine the optimal operating parameters of the dual-radial swirl shielding ventilation system, a numerical simulation method was used to conduct an in-depth study on the blowing and suction air volume ratio of the system. The results showed that when the blowing and suction air volume ratio of the air duct was 1.5, the radial air curtain had the highest strength. Under this condition, the dust concentration at the driver’s position of the roadheader was the lowest, and the dual-radial swirl shielding ventilation system can achieve an ideal dust control effect.

Investigation of the Performance and Flow Behaviors of the Multi-blade Centrifugal Fan Based on the Computer Simulation Technology

2018 ◽  
Vol 103 (1) ◽  
pp. 563-574
Author(s):  
Jianjun Ye ◽  
Wenwu Liu ◽  
Peng Duan ◽  
Xingyu Huang ◽  
Junda Shao ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Centrifugal Fan ◽  
Simulation Technology

Computer Simulation of the Pulsed Powering of D.C. Circuit Breaker for the 13 Ka Superconducting Magnet Energy Extraction System

2009 ◽  
Vol 4 (2) ◽  
pp. 84-91
Author(s):  
Aleksandr Erokhin ◽  
Anatoliy Medvedko
Keyword(s):  
Computer Simulation ◽  
Magnetic Circuit ◽  
Circuit Breaker ◽  
Superconducting Magnet ◽  
Extraction System ◽  
Energy Extraction ◽  
Electrical Circuits ◽  
Non Linear

The article presents the results of modeling and computer simulation of non-linear devices such as the electromagnetic driver of a D.C. circuit breaker. The mechanical and electromagnetic parts of the driver are represented as equivalent electrical circuits and all basic processes of the driver’s magnetic circuit are calculated.

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