Simulation of Flow Field of Oxygen Lance Gas Jet Utilized for 50 t Converter

2011 ◽  
Vol 18 (4) ◽  
pp. 11-18 ◽  
Author(s):  
Jun-guo Li ◽  
Ya-nan Zeng ◽  
Jian-qiang Wang ◽  
Zhi-jie Han
Keyword(s):  
Flow Field ◽  
Gas Jet ◽  
Oxygen Lance

Simulation and Experimental Analysis of the Effect of Channel Width on Flow Field in Laser Cutting

2009 ◽  
Vol 626-627 ◽  
pp. 171-176 ◽  
Author(s):  
X.J. Sheng ◽  
Jun Hu
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Laser Cutting ◽  
Cone Angle ◽  
Three Dimensional ◽  
Channel Width ◽  
Gas Jet ◽  
Channel Surface ◽  
Symmetrical Model ◽  
Cutting Experiment

A three-dimensional axial symmetrical model of laser cutting is established by adopting N-S equation in the paper, and numerical simulation is put up to analyze the flow field of assist gas in cutting channel. The investigation reveals the law about how channel width affects the dynamic characteristic of gas jet in the cutting process, and the distributions of pressure and velocity of gas jet with different channel widths are shown in the study. The study shows that the intensity of compressed wave and expanded wave in cutting channel declines remarkably with channel width increasing, and the kinetic energy at channel surface drops while the cutting quality is deteriorated. A taper nozzle with cone angle of 30°and a convergence nozzle comprised a parabola equation of are designed for the laser cutting experiment. The experimental results are given at the end of the paper.

Effect of Jet Oscillation on the Maximum Impingement Plate Skin Friction

2018 ◽  
Vol 140 (9) ◽  
Author(s):  
Adam Ritcey ◽  
Joseph R. McDermid ◽  
Samir Ziada
Keyword(s):  
Flow Field ◽  
Skin Friction ◽  
Field Measurements ◽  
Friction Reduction ◽  
Gas Jet ◽  
Impingement Plate ◽  
Image Velocimetry ◽  
Skin Friction Reduction ◽  
Jet Oscillation ◽  
Quiescent Fluid

The maximum impingement plate skin friction and flow field is measured for an acoustically forced planar impinging gas jet using oil film interferometry (OFI) and particle image velocimetry (PIV), respectively. The study is performed at a jet Reynolds number of Rejet = 11,000 and an impingement distance H, which is set to eight times the nozzle width W. The planar impinging gas jet is forced at the jet nozzle exit using Strouhal numbers StH = 0.39, 0.76, and 1.1, which are similar to those associated with the jet-plate tones measured in air-knife wiping experiments. The flow-field measurements indicate that the jet column oscillates at the applied forcing frequency, and depending on the forcing frequency, organized vortex structures can be identified in the shear layers that impinge on the plate surface. Both of these jet oscillation features result in a reduction in the time-averaged maximum impingement plate skin friction. This skin friction reduction is attributed to momentum loss at the jet centerline caused by increased levels of fluid entrainment and mixing of the surrounding quiescent fluid.

Simulation and Analysis for the Rocket Gas Flow Field Based on Mechanical Mechanics and Mechanical Properties

2013 ◽  
Vol 345 ◽  
pp. 455-458
Author(s):  
Yang Zhang ◽  
Yi Jiang ◽  
Xiao Tong Dong
Keyword(s):  
Mechanical Properties ◽  
Flow Field ◽  
Stream Flow ◽  
Gas Flow ◽  
Gas Jet ◽  
Absolute Pressure ◽  
Danger Zone ◽  
Transmission Process ◽  
Process Gas ◽  
Analog Transmission

Gas jet of the rocket on the launch environment has serious gas shock effects, bursts of rocket impact will be greater and greater harm. This article take the numerical methods for simulation, analog transmission process gas stream flow, and finally calculate the pressure and temperature of the emitting device impingement flow field and the maximum absolute pressure and temperature, and ultimately determine gas impact of the danger zone of the flow field.

COMPUTATION OF THE FLOW FIELD IN A RECIRCULATING TURBULENT GAS JET

1987 ◽  
Vol 61 (1-6) ◽  
pp. 39-57 ◽  
Author(s):  
Y.B. HAHN ◽  
H.Y. SOHN
Keyword(s):  
Flow Field ◽  
Gas Jet

The Experimentation and Imitation Study on Flow Field of Coherent Jet

2010 ◽  
Vol 150-151 ◽  
pp. 930-936
Author(s):  
Kun Liu ◽  
Ren Zhi Han ◽  
Chun Yang
Keyword(s):  
Flow Field ◽  
Supersonic Jet ◽  
Jet Flow ◽  
Compressed Air ◽  
Measuring System ◽  
Low Density ◽  
Flow State ◽  
Oxygen Lance ◽  
Coherent Jet ◽  
Cold Condition

By oxygen lance measuring system, under the normal temperature (cold condition) systematic study is carried on traditional supersonic jet flow field that is simulated by compressed-air and on coherent jet flow flied which is accompanied by low density helium in this paper, By commercial software FLUENT, associated with experimental data, the standard double equation K- model is revised appropriately with C1=1.45，C2=1.88. The behavior of axis symmetric jet can be predicted better by simulated results. The flow state of traditional supersonic jet and the characteristic of coherent jet flow flied under vice-hole helium low density concomitance situation are analyzed systematically.

scholarly journals Physical Modelling of Splashing Triggered by the Gas Jet of an Oxygen Lance in a Converter

Metals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 409 ◽  
Author(s):  
Bo Zhang ◽  
Kai Chen ◽  
Ruifang Wang ◽  
Chengjun Liu ◽  
Maofa Jiang
Keyword(s):  
Gas Flow ◽  
Physical Modelling ◽  
Gas Jet ◽  
Smelting Process ◽  
Furnace Lining ◽  
Bath Surface ◽  
Oxygen Lance ◽  
Molten Bath ◽  
Cavity Shape ◽  
The Impact

To characterize the splashing behavior under the impact of the top-blown gas jet in converter, in this paper a physical model is developed with the prototype of a 200 t converter in China. We captured the impact cavity morphology triggered by the top-blown gas jet of the oxygen lance, and found that the impact cavity shape gradually changed following the sequence of “disc” → “bowl” → “cone” with the increase in the gas flow, leading to the variation of the splashing modes. Moreover, the splashing inside and outside the converter was characterized quantitatively under the different top-blown gas jet conditions. The results showed that the splashing on the furnace inner wall concentrated at the region adjacent to the molten bath surface, implying severe flushing of the furnace lining of this region. The critical gas flow of splashing outside the converter is 32.3 Nm3·h−1, corresponding to a gas flow of 39,000 Nm3·h−1 in the prototype. In addition, the foaming slag can suppress the splashing during the smelting process. The statistics of the splashing flux provide a reference for maintaining the safety of the workers and the converter equipment.

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