scholarly journals Global heat transfer model and dynamic ray tracing algorithm for complex multiple turbine blades of Ni-based superalloys in directional solidification process

China Foundry ◽  
2019 ◽  
Vol 16 (5) ◽  
pp. 326-335
Author(s):  
Wen Wang ◽  
Jian-xin Zhou ◽  
Zhao Guo ◽  
Ya-jun Yin ◽  
Xu Shen ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Directional Solidification ◽  
Ray Tracing ◽  
Turbine Blades ◽  
Solidification Process ◽  
Heat Transfer Model ◽  
Transfer Model ◽  
Directional Solidification Process ◽  
Dynamic Ray Tracing ◽  
Tracing Algorithm

scholarly journals Influence of Crucible Thermal Conductivity on Crystal Growth in an Industrial Directional Solidification Process for Silicon Ingots

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Zaoyang Li ◽  
Lijun Liu ◽  
Yunfeng Zhang ◽  
Genshu Zhou
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Crystal Growth ◽  
Directional Solidification ◽  
Silicon Crystal ◽  
Solidification Process ◽  
Interface Shape ◽  
Directional Solidification Process ◽  
Reasonable Range ◽  
Crystal Interface

We carried out transient global simulations of heating, melting, growing, annealing, and cooling stages for an industrial directional solidification (DS) process for silicon ingots. The crucible thermal conductivity is varied in a reasonable range to investigate its influence on the global heat transfer and silicon crystal growth. It is found that the crucible plays an important role in heat transfer, and therefore its thermal conductivity can influence the crystal growth significantly in the entire DS process. Increasing the crucible thermal conductivity can shorten the time for melting of silicon feedstock and growing of silicon crystal significantly, and therefore large thermal conductivity is helpful in saving both production time and power energy. However, the high temperature gradient in the silicon ingots and the locally concave melt-crystal interface shape for large crucible thermal conductivity indicate that high thermal stress and dislocation propagation are likely to occur during both growing and annealing stages. Based on the numerical simulations, some discussions on designing and choosing the crucible thermal conductivity are presented.

The Simulation Analysis on the Heat Transfer Model of Bloom

2013 ◽  
Vol 753-755 ◽  
pp. 872-875
Author(s):  
Ying Ying Zhai ◽  
Ying Li ◽  
Chen Yan ◽  
Yu Shi Ding
Keyword(s):  
Heat Transfer ◽  
Casting Speed ◽  
Simulation Analysis ◽  
Shell Growth ◽  
Cooling Water ◽  
Solidification Process ◽  
Heat Transfer Model ◽  
Transfer Model ◽  
Cooling Zone ◽  
Secondary Cooling

A mathematical heat transfer model was built to simulate temperature, shell growth and phase transformations in continuous casting based on the technical conditions of the bloom caster of some steelmaking plant. The simulation result is coincided with the measurement. The effects of the operation parameters including casting speed, bloom size and steel melt superheat on the solidification process were discussed and the means of enhancing the bloom temperature was brought forward. The research results have been applied in the practical manufacture process to compute the best casting speed, to control the flow rate of secondary cooling water and to optimize the spray pattern of secondary cooling zone. The bloom quality and productivity could be improved.

Optimization of heat transfer during the directional solidification process of 1600 kg silicon feedstock

2018 ◽  
Vol 484 ◽  
pp. 70-77 ◽  
Author(s):  
Chieh Hu ◽  
Jyh Chen Chen ◽  
Thi Hoai Thu Nguyen ◽  
Zhi Zhong Hou ◽  
Chun Hung Chen ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Directional Solidification ◽  
Solidification Process ◽  
Directional Solidification Process
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