Simulation Test Study on Influence of Grounding Resistance on Lightning Capability of Triggering Lightning Tower

2018 ◽  
Author(s):  
Bao Wen ◽  
Xishan Wen ◽  
Rui Wang ◽  
Yu Wang ◽  
Yeqiang Deng ◽  
...  
Keyword(s):  
Simulation Test ◽  
Grounding Resistance ◽  
Test Study

Simulation test study of single event transient effect for high speed PWM with pulse laser

2020 ◽  
Vol 49 (8) ◽  
pp. 20190533-20190533
Author(s):  
安恒 Heng An ◽  
李得天 Detian Li ◽  
文轩 Xuan Wen ◽  
张晨光 Chenguang Zhang ◽  
王鷁 Yi Wang ◽  
...  
Keyword(s):  
Pulse Laser ◽  
High Speed ◽  
Single Event ◽  
Single Event Transient ◽  
Simulation Test ◽  
Transient Effect ◽  
Test Study

Simulation test study of single event transient effect for high speed PWM with pulse laser

2020 ◽  
Vol 49 (8) ◽  
pp. 20190533-20190533
Author(s):  
安恒 Heng An ◽  
李得天 Detian Li ◽  
文轩 Xuan Wen ◽  
张晨光 Chenguang Zhang ◽  
王鷁 Yi Wang ◽  
...  
Keyword(s):  
Pulse Laser ◽  
High Speed ◽  
Single Event ◽  
Single Event Transient ◽  
Simulation Test ◽  
Transient Effect ◽  
Test Study

The Test Study on Fracture Mechanism and Reinforcement Pattern of Backfill Roof under High Stress

2011 ◽  
Vol 243-249 ◽  
pp. 5041-5047
Author(s):  
Xiao Jun Wang ◽  
Kui Zhao ◽  
Qiang Lei
Keyword(s):  
Numerical Simulation ◽  
Physical Modeling ◽  
Mechanical Model ◽  
Failure Modes ◽  
High Stress ◽  
Simulation Test ◽  
Simply Supported ◽  
Test Study ◽  
Cemented Backfill ◽  
Modeling Experiment

The roof is cemented backfill in underhand drift cut-and-filling stopping, stability of cemented fills is the key to safety of mining. Through numerical simulation test, simply supported beams subjected to uniform was considered mechanical model of backfill roof. and failure modes of backfill roof was found through physical modeling experiment. The results show that the failure of backfill roof is first happening from the center at the bottom of backfill, the final result is that falling arch. Based on the the result of the experiment, finally, The reasonable reinforcement pattern was proposed to avoid failure of backfill roof.

The Effect of Using Ramps with Trench Cylindrical Holes on Film Cooling Effectiveness

2015 ◽  
Vol 3 (2) ◽  
pp. 15-27
Author(s):  
Ahmed A. Imram ◽  
Humam K. Jalghef ◽  
Falah F. Hatem
Keyword(s):  
Numerical Simulation ◽  
Film Cooling ◽  
Air Injection ◽  
Baseline Model ◽  
Cooling Effectiveness ◽  
Film Cooling Effectiveness ◽  
Blowing Ratio ◽  
Hot Air ◽  
Test Study ◽  
Cylindrical Holes

     The effect of introducing ramp with a cylindrical slot hole on the film cooling effectiveness has been investigated experimentally and numerically. The film cooling effectiveness measurements are obtained experimentally. A test study was performed at a single mainstream with Reynolds number 76600 at three different coolant to mainstream blowing ratios 1.5, 2, and 3. Numerical simulation is introduced to primarily estimate the best ramp configurations and to predict the behavior of the transport phenomena in the region linked closely to the interaction between the coolant air injection and the hot air mainstram flow. The results showed that using ramps with trench cylindrical holes would enhanced the overall film cooling effectiveness by 83.33% compared with baseline model at blowing ratio of 1.5, also  the best overall flim cooling effectevness was obtained at blowing ratio of 2 while it is reduced at blowing ratio of 3.

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