scholarly journals Modeling of the Effect of the Gas Flow Rate on the Fluid Flow and Open‐Eye Formation in a Water Model of a Steelmaking Ladle

2018 ◽  
Vol 90 (2) ◽  
pp. 1800365 ◽  
Author(s):  
Eshwar Kumar Ramasetti ◽  
Ville‐Valtteri Visuri ◽  
Petri Sulasalmi ◽  
Riku Mattila ◽  
Timo Fabritius
Keyword(s):  
Fluid Flow ◽  
Flow Rate ◽  
Gas Flow ◽  
Water Model ◽  
Gas Flow Rate ◽  
Eye Formation

scholarly journals Evaluation of Critical Gas Flow Rate for the Entrapment of Slag Using a Water Model.

1994 ◽  
Vol 34 (2) ◽  
pp. 164-170 ◽  
Author(s):  
Manabu Iguchi ◽  
Yutaka Sumida ◽  
Ryusuke Okada ◽  
Zen-ichiro Morita
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Water Model ◽  
Gas Flow Rate

scholarly journals An Experimental and Simulated Study on Gas-Liquid Flow and Mixing Behavior in an ISASMELT Furnace

Metals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 565 ◽  
Author(s):  
Hongliang Zhao ◽  
Tingting Lu ◽  
Pan Yin ◽  
Liangzhao Mu ◽  
Fengqin Liu
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Turbulent Viscosity ◽  
Mixing Time ◽  
Water Model ◽  
Mixing Efficiency ◽  
Gas Flow Rate ◽  
Factors Affecting ◽  
Sufficient Energy ◽  
Gas Liquid Flow

In this study, a water-model experiment and numerical simulation were carried out in a pilot ISASMELT furnace to study the factors affecting mixing time. The experimental results were compared to the simulation results to test the accuracy of the latter. To study the internal factors that affect the mixing time, the turbulent viscosity and flow field were calculated using simulation. In addition, following previous research, external factors that influence the mixing time including the depth of the submerged lance, lance diameter, gas flow rate, and the presence of a swirler were studied to investigate their effect on the flow regime. The results indicated that the mixing time is controlled by the turbulent viscosity and velocity vector. In addition, it was found that the lance diameter should not exceed 3.55 cm to maintain sufficient energy for stirring the bath. Finally, the optimal gas flow rate that offers the best mixing efficiency was found to be 50 Nm3/h.

Water Model Study on Circulation Rate Influenced by Snorkel, Nozzle and Blowing Parameters in RH Refining

2011 ◽  
Vol 287-290 ◽  
pp. 840-843 ◽  
Author(s):  
Sheng Li Li ◽  
Xin Gang Ai ◽  
Ning Wang ◽  
Nan Lv
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Water Model ◽  
Circulation Rate ◽  
Circulation Flow ◽  
Linear Scale ◽  
Gas Flow Rate ◽  
Model Study ◽  
Inner Diameter ◽  
Injection Depth

A water model of 1/4 linear scale for 210t RH has been established. RH circulation flow rate is measured by a velocimeter. The influences of lifting gas flow rate, snorkel inner diameter, injection depth and nozzle inner diameter on circulation rate were discussed. The dimension correlation has been calculated for the prediction of circulation rate. The results showed that the formula of circulation rate is 5.434×10-6G0.356·D1.254·d -0.106·H 0.821. The best nozzles inner diameter in terms of circulation rate was 3mm.

Flow Field and Gas-Bubble Size Analysis in Water Model for the Process of Aluminum Melt Degassing by Particle Image Velocimetry

2007 ◽  
Vol 546-549 ◽  
pp. 1087-1092 ◽  
Author(s):  
Rui Zhi Wu ◽  
Da Shu ◽  
Jun Wang ◽  
Bao De Sun ◽  
Mi Lin Zhang
Keyword(s):  
Flow Field ◽  
Flow Rate ◽  
Bubble Size ◽  
Gas Flow ◽  
Water Model ◽  
Size Analysis ◽  
Gas Bubble ◽  
Gas Flow Rate ◽  
Aluminum Melt ◽  
Rotary Speed

The flow field and gas-bubble size during the process of aluminum melt degassing were investigated in water model. A Φ400mm×400mm transparent water model and an impellor degassing device were used in this study. The instantaneous velocity fields of water and bubbles under the mixture of rotary injector were measured with PIV velocity field measurement technique. Then the pictures of bubbles gained from PIV were analyzed with software to get the bubble size distribution. The results showed that bubble flow field and bubble size were influenced by rotary speed of rotor and gas flow-rate. With the increase of rotary speed of rotor, the horizontal velocity components of bubbles became larger, the stagnant time of bubbles in water increaseed correspondingly and bubble size became smaller. With the increase of gas flow-rate, the longitudinal velocity components of bubbles became larger, the stagnant time of bubbles in water decreased correspondingly, and the bubble size became larger also.

scholarly journals Evaluation of the Critical Gas Flow Rate Using Water Model for the Entrapment of Slag into a Metal Bath Subject to Gas Injection

1993 ◽  
Vol 79 (5) ◽  
pp. 569-575 ◽  
Author(s):  
Manabu IGUCHI ◽  
Yutaka SUMIDA ◽  
Ryusuke OKADA ◽  
Zen-ichiro MORITA
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Gas Injection ◽  
Water Model ◽  
Gas Flow Rate ◽  
Metal Bath

scholarly journals Numerical Analysis of Effect of Initial Bubble Size on Captured Bubble Distribution in Steel Continuous Casting Using Euler-Lagrange Approach Considering Bubble Coalescence and Breakup

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1160
Author(s):  
Weidong Yang ◽  
Zhiguo Luo ◽  
Nannan Zhao ◽  
Zongshu Zou
Keyword(s):  
Continuous Casting ◽  
Flow Rate ◽  
Bubble Size ◽  
Gas Flow ◽  
Bubble Coalescence ◽  
Water Model ◽  
Number Density ◽  
Gas Flow Rate ◽  
Bubble Distribution ◽  
Lagrange Approach

A mathematic model considering the bubble coalescence and breakup using the Euler-Lagrange approach has been developed to study the effect of the initial bubble size on the distribution of bubbles captured by the solidification shell. A hard sphere model was applied for dealing with the bubble collision. Advanced bubble coalescence and breakup models suitable for the continuous casting system and an advanced bubble captured criteria have been identified established with the help of user-defined functions of FLUENT. The predictions of bubble behavior and captured bubble distribution agree with the water model and plant measurements well respectively. The results show that the number of small bubbles captured by solidification shell is much higher than that of large bubbles. What is more, the number of captured bubbles at the sidewalls decreases with the distance from the meniscus. For the case of large gas flow rate (gas flow fraction of 8.2%), the initial size of bubbles has little effect on bubble captured distribution under various casting speeds. When the gas flow rate is small (gas flow fraction of 4.1%), the number density of captured bubbles increases as the initial bubble size increases, and the effect of initial bubbles size on captured bubble number density is amplified when the casting speed decreases. The average captured bubble diameter is about 0.12–0.14 mm. Additionally, for all cases, the initial bubble size hardly affects the average size of captured bubbles.

scholarly journals Fluid Flow Characteristic of EAF Molten Steel with Different Bottom-Blowing Gas Flow Rate Distributions

2020 ◽  
Vol 60 (9) ◽  
pp. 1957-1967
Author(s):  
Zeshi Yang ◽  
Lingzhi Yang ◽  
Ting Cheng ◽  
Feng Chen ◽  
Fuqiang Zheng ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Flow Rate ◽  
Molten Steel ◽  
Gas Flow ◽  
Flow Characteristic ◽  
Gas Flow Rate ◽  
Bottom Blowing

SCIENTIFIC AND ENGINEERING PRINCIPLES OF EFFICIENT FUEL USE AND ENVIRONMENTALLY FRIENDLY GAS COMBUSTION IN STOVE PLATES. PART 1. MODERN STATE-OF-THE-ART AND DIRECTIONS FOR IMPROVEMENT THE GAS BURNING IN DOMESTIC GAS COOKERS

2017 ◽  
pp. 3-18 ◽  
Author(s):  
B.S. Soroka ◽  
V.V. Horupa
Keyword(s):  
Natural Gas ◽  
Flow Rate ◽  
Gas Flow ◽  
Renewable Energy Sources ◽  
Combustion Process ◽  
Orifice Diameter ◽  
Firing Process ◽  
Gas Flow Rate ◽  
Gas Combustion ◽  
Gas Stoves

Natural gas NG consumption in industry and energy of Ukraine, in recent years falls down as a result of the crisis in the country’s economy, to a certain extent due to the introduction of renewable energy sources along with alternative technologies, while in the utility sector the consumption of fuel gas flow rate enhancing because of an increase the number of consumers. The natural gas is mostly using by domestic purpose for heating of premises and for cooking. These items of the gas utilization in Ukraine are already exceeding the NG consumption in industry. Cooking is proceeding directly in the living quarters, those usually do not meet the requirements of the Ukrainian norms DBN for the ventilation procedures. NG use in household gas stoves is of great importance from the standpoint of controlling the emissions of harmful components of combustion products along with maintenance the satisfactory energy efficiency characteristics of NG using. The main environment pollutants when burning the natural gas in gas stoves are including the nitrogen oxides NOx (to a greater extent — highly toxic NO2 component), carbon oxide CO, formaldehyde CH2O as well as hydrocarbons (unburned UHC and polyaromatic PAH). An overview of environmental documents to control CO and NOx emissions in comparison with the proper norms by USA, EU, Russian Federation, Australia and China, has been completed. The modern designs of the burners for gas stoves are considered along with defining the main characteristics: heat power, the natural gas flow rate, diameter of gas orifice, diameter and spacing the firing openings and other parameters. The modern physical and chemical principles of gas combustion by means of atmospheric ejection burners of gas cookers have been analyzed from the standpoints of combustion process stabilization and of ensuring the stability of flares. Among the factors of the firing process destabilization within the framework of analysis above mentioned, the following forms of unstable combustion/flame unstabilities have been considered: flashback, blow out or flame lifting, and the appearance of flame yellow tips. Bibl. 37, Fig. 11, Tab. 7.

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