Study on the Effect of Different CO2–O2 Mixture Gas Blowing Modes on Vanadium Oxidation

2019 ◽  
pp. 787-794
Author(s):  
Zheng-Lei Guo ◽  
Yu Wang ◽  
Qi Lu ◽  
Shu-Chao Wang
Keyword(s):  
Gas Blowing

Experimental studies on the bath oscillation during gas blowing into liquids, part 2: measurements in a converter model

1992 ◽  
Vol 63 (7) ◽  
pp. 277-280 ◽  
Author(s):  
Yongkun Xie ◽  
Franz Oeters
Keyword(s):  
Experimental Studies ◽  
Gas Blowing

Allowance for gas blowing in supersonic flow over a wedge

1976 ◽  
Vol 30 (6) ◽  
pp. 663-668 ◽  
Author(s):  
M. P. Ovsyannikov
Keyword(s):  
Supersonic Flow ◽  
Gas Blowing

Influence The Direction Of Blowing Gas Through A Porous Surface On The Stability Of The Supersonic Boundary Layer

2015 ◽  
Vol 10 (2) ◽  
pp. 18-26
Author(s):  
Sergey Gaponov ◽  
Aleksandr Semenov
Keyword(s):  
Boundary Layer ◽  
Classical Method ◽  
Supersonic Boundary Layer ◽  
Porous Surface ◽  
Boundary Layer Stability ◽  
Injection Angle ◽  
Plane Plate ◽  
The Stability ◽  
Gas Blowing ◽  
Elementary Waves

In the paper the influence of the gas blowing direction through a porous surface on the supersonic boundary layer stability is investigated theoretically, using the classical method of elementary waves and the evolutionary method at Mach number M = 2. It was found that with decreasing of the gas injection angle to the plane plate the boundary layer stability was improved and the tangential blowing effect on the boundary layer stability is little in a comparison with the case of a boundary layer without mass exchange.

scholarly journals Numerical Modeling and Experimental Behavior of Closed-Cell Aluminum Foam Fabricated by the Gas Blowing Method under Compressive Loading

Materials ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1582 ◽  
Author(s):  
Varun Sharma ◽  
Fatima Zivic ◽  
Nenad Grujovic ◽  
Norbert Babcsan ◽  
Judith Babcsan
Keyword(s):  
Numerical Modeling ◽  
Compressive Loading ◽  
Material Behavior ◽  
Small Cells ◽  
Uniaxial Compression Test ◽  
Average Cell ◽  
Tensile Stresses ◽  
Closed Cell ◽  
Gas Blowing ◽  
Over The Top

This paper deals with the experimental and numerical study of closed-cell aluminum-based foam under compressive loading. Experimental samples were produced by the gas blowing method. Foam samples had an average cell size of around 1 mm, with sizes in the range 0.5–5 mm, and foam density of 0.6 g/cm3. Foam samples were subjected to a uniaxial compression test, at a displacement rate of 0.001 mm/s. Load and stress were monitored as the functions of extension and strain, respectively. For numerical modeling, CT scan images of experimental samples were used to create a volume model. Solid 3D quadratic tetrahedron mesh with TETRA 10-node elements was applied, with isotropic material behavior. A nonlinear static test with an elasto-plastic model was used in the numerical simulation, with von Mises criteria, and strain was kept below 10% by the software. Uniform compressive loading was set up over the top sample surface, in the y-axis direction only. Experimental tests showed that a 90 kN load produced complete failure of the sample, and three zones were exhibited: an elastic region, a rather uniform plateau region (around 23 MPa) and a densification region that started around 35 MPa. Yielding, or collapse stress, was achieved around 20 MPa. The densification region and a rapid rise in stress began at around 52% of sample deformation. The numerical model showed both compressive and tensile stresses within the complex stress field, indicating that shear also had a prominent role. Mainly compressive stresses were exhibited in the zones of the larger cells, whereas tensile stresses occurred in zones with an increased number of small cells and thin cell walls.

scholarly journals Mixing Phenomenon and Flow Field in Ladle of RH Process

Metals ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 886 ◽  
Author(s):  
Kaitian Zhang ◽  
Heng Cui ◽  
Rudong Wang ◽  
Yang Liu
Keyword(s):  
Flow Field ◽  
Vacuum Chamber ◽  
Mixing Time ◽  
Mixing Layer ◽  
Water Model ◽  
Utilization Rate ◽  
Rh Process ◽  
Depth Increase ◽  
The One ◽  
Gas Blowing

Particle image velocimetry (PIV) system was adopted to investigate the relationship between the mixing phenomenon and the flow field of a 210 t RH degasser by a 1:4 scale water model. The results of mixing simulation experiments indicated that the mixing time decreased with the increase of gas blowing rate. However, with the increase of Snorkel immersion depth (SID), the mixing time presented a decreasing rend firstly and then increased. The measurement of flow fields of RH ladle by PIV system can explain the phenomenon above. According to the characteristics of the flow field in RH ladle, the flow field can be divided into the mixing layer, the transition layer, and the inactive layer. On the one hand, the stirring power in RH ladle and vacuum chamber both increases with more gas blowing rate, leading to the decrease of mixing time. On the other hand, with SID increases from 400 mm to 480 mm, the gas blowing depth increase results in the mixing power increases, and the mixing time decreases at the beginning. Because of too much-molten steel in the vacuum chamber and the expanding of the inactive layer in RH ladle, however, the utilization rate of the gas driving force begins to decrease. Therefore, the mixing time started to increases with the increase of SID.

scholarly journals Experimental Stand for Investigations of Insulator Degradation and Electrode Erosion in High-current Breaker

2017 ◽  
Vol 4 (2) ◽  
pp. 120-123 ◽  
Author(s):  
A. V. Budin ◽  
M. E. Pinchuk ◽  
V. V. Leontev ◽  
A. G. Leks ◽  
N. K. Kurakina ◽  
...  
Keyword(s):  
Experimental Data ◽  
Discharge Chamber ◽  
Diagnostic Techniques ◽  
Electrode Erosion ◽  
High Current ◽  
Capacitive Energy Storage ◽  
Experimental Stand ◽  
Advanced Composite Materials ◽  
Preliminary Experimental Data ◽  
Gas Blowing

An experimental stand for studies of electric arc, electrode erosion and insulator degradation processes in high-current circuit breakers and some preliminary experimental data is described. The setup includes a discharge chamber, a capacitive energy storage with capacitance of 0.11 F, voltage up to 10 kV, and all necessary diagnostic techniques. The stand is designed for modeling current pulse with amplitude of 3–150 kA and duration of the first half period of 1.0–3.0  ms during the process of disconnecting the ring and the pin contacts. The arc is cooled by transverse gas blowing at pressure in the chamber of 0.5–3 MPa. Acquired experimental data can be used for verification of the modelling results of the heat transfer processes in the discharge chamber. At the stand, advanced composite materials based on carbon and iron-copper pseudoalloy are studied.

Impurities Removal From Metallurgical Grade Silicon Using Gas Blowing Refining Techniques

Silicon ◽  
2013 ◽  
Vol 6 (1) ◽  
pp. 79-85 ◽  
Author(s):  
Jijun Wu ◽  
Yanlong Li ◽  
Wenhui Ma ◽  
Kai Liu ◽  
Kuixian Wei ◽  
...  
Keyword(s):  
Metallurgical Grade Silicon ◽  
Grade Silicon ◽  
Impurities Removal ◽  
Gas Blowing

Characterization of Si–C Covalent Bonding Fabricated between Single Carbon Nanotube and Si Substrate

2014 ◽  
Vol 543-547 ◽  
pp. 3711-3715
Author(s):  
Xia Liu ◽  
Lian Zhen Cao
Keyword(s):  
Carbon Nanotube ◽  
Vapor Deposition ◽  
Covalent Bonding ◽  
Si Substrate ◽  
Covalent Bonds ◽  
Thermal Vapor Deposition ◽  
Individual Cnts ◽  
Imaging And Spectroscopy ◽  
Gas Blowing

The SiC covalent bonding between Carbon nanotube and Si substrate was fabricated by thermal vapor deposition using photolithography and gas blowing technology. Scanning electron microscopy, micro-Raman imaging and spectroscopy were used to investigate the interaction of individual CNTs and Si substrate. The characterization results showed that covalent bonds were formed between certain CNTs and Si substrate. Moreover, the reasons for the fabrication of SiC covalent bonding between CNTs and Si substrate were also proposed.

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