Variation in Multiphase Flow Characteristics by Nozzle‐Twisted Lance Blowing in Converter Steelmaking Process

2021 ◽  
pp. 2100409
Author(s):  
Ming Lv ◽  
Hang Li ◽  
Xiangdong Xing ◽  
Tengchang Lin ◽  
Shaoyan Hu ◽  
...  
Keyword(s):  
Multiphase Flow ◽  
Flow Characteristics ◽  
Converter Steelmaking ◽  
Steelmaking Process

scholarly journals Effect of Furnace Gas Composition on Characteristics of Supersonic Oxygen Jets in the Converter Steelmaking Process

Materials ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3353
Author(s):  
Liujie Yao ◽  
Rong Zhu ◽  
Yixing Tang ◽  
Guangsheng Wei ◽  
Kai Dong
Keyword(s):  
High Temperature ◽  
Volume Fraction ◽  
Flow Characteristics ◽  
Converter Steelmaking ◽  
Cfd Model ◽  
Steelmaking Process ◽  
Combustion Experiment ◽  
Computational Fluid Dynamics Cfd ◽  
Fluid Flow Characteristics ◽  
Jet Characteristics

During the converter steelmaking process, the presence of supersonic oxygen jets can provide oxygen to high-temperature metal baths that promotes chemical reactions in the bath, accelerates the smelting rhythm, and facilitates a uniform distribution of the ingredients in the bath. In this paper, a computational fluid dynamics (CFD) model with combustion reactions is established and compared to the results of combustion experiment. This paper studies the behavior and fluid flow characteristics of supersonic oxygen jets under different environmental compositions under a steelmaking temperature of 1873 K. This validated CFD model can be used to investigate the effect of furnace gas on supersonic oxygen jet characteristics during the converter steelmaking process. The results indicate that the composition of furnace gas has an impact on the characteristics of the oxygen jet. Specifically, as the carbon monoxide (CO) volume fraction increases, the high velocity region of supersonic oxygen jet increases, and the high temperature and the high turbulent kinetic energy regions expand.

scholarly journals Local multiphase flow characteristics of a severe-service control valve

2020 ◽  
Vol 195 ◽  
pp. 107557
Author(s):  
D. Singh ◽  
A.M. Aliyu ◽  
M. Charlton ◽  
R. Mishra ◽  
T. Asim ◽  
...  
Keyword(s):  
Multiphase Flow ◽  
Flow Characteristics ◽  
Control Valve ◽  
Service Control

Phase Relation of Forces Between Multiple Bends

2019 ◽  
Author(s):  
S. P. C. Belfroid ◽  
H. Pereboom ◽  
N. Gonzalez-Diez ◽  
A. Anantharaman
Keyword(s):  
Multiphase Flow ◽  
Annular Flow ◽  
Flow Behavior ◽  
Flow Characteristics ◽  
Response Analysis ◽  
Force Frequency ◽  
Frequency Response Analysis ◽  
High Frequencies ◽  
Transport Velocity ◽  
Flow Induced Vibrations

Abstract Multiphase flow induced vibrations are difficult to calculate. This is in part the prediction of the force frequency spectrum at a single bend, part the influence of bends on the multiphase flow behavior and therefore the prediction of the multiphase flow characteristics between bends. In this paper, the evolution of the forces between subsequent bends are discussed including the phase relations of the forces on the different bends. For annular flow, the forces between the different bends are incoherent and are more or less random. However, for stratified and especially slug flow, the forces remain coherent up to high frequencies. This means in a frequency response analysis of a piping structure, the transport velocity of the multiphase structures must be taken into account.

Study Advancement for Multiphase Flow and Heat and Mass Transfer Characteristics for Gas Hydrate Decomposition in South China Sea Offshore Sediment

2013 ◽  
Author(s):  
Xichong Yu ◽  
Jiafei Zhao ◽  
Weixin Pang ◽  
Gang Li ◽  
Yu Liu
Keyword(s):  
Mass Transfer ◽  
Multiphase Flow ◽  
Heat And Mass Transfer ◽  
Gas Hydrate ◽  
Flow Characteristics ◽  
Decomposition Process ◽  
Lattice Boltzmann Model ◽  
Experimental Simulation ◽  
Hydrate Decomposition ◽  
Multi Phase Flow

Gas hydrates are crystalline solids that consist of gas molecules, usually methane, surrounded by water molecules. According to the phase equilibrium characteristics of gas hydrate, there are three basic development methods, including heating, pressure decreasing and chemical injecting. The development process is actually the multi-phase flow process. Currently, there is no good commercial software used to simulate the multiphase flow, heat transmission and mass transfer in the gas hydrate decomposition process. The study is not mature, still in the development and trial stage. So in this paper, we will make a deeply study on the multi-phase flow simulation method of gas hydrate decomposition in the sediment. We try to make breakthrough in the theory and simulate method. According to the different scales, the simulation computation study of flow characteristics model has microcosmic, mesocosmic and macrocosmic scales. In this paper, mesocosmic scales is used to study for the multiphase flow, heat and mass transfer in the offshore gas hydrate decomposition process, and numerical simulation and experimental simulation are together used to study. Study advancements are shown as follows: firstly, conventional Lattice Boltzmann model is modified to new Lattice Boltzmann Model (LBM) based on sediment with gas hydrate and flow characteristics for gas hydrate decomposition, the interaction and density difference between the phases are considered, and Magnetic Resonance Imaging (MRI) visual technology is used to successfully verified to LBM methods. Secondly, contraction core reaction methods based on fractal theory is used to simulate heat and mass transfer in the offshore gas hydrate decomposition process and is successfully verified by experimental simulation for South China Sea offshore gas hydrate sediment.

A Study on the Multiphase Flow Characteristics Inside Subsea Separation System

2014 ◽  
Author(s):  
Nam-Sub Woo ◽  
Young-Ju Kim ◽  
Sang-Mok Han ◽  
Jae-Ki Kwon ◽  
Sang-Shik Kim ◽  
...  
Keyword(s):  
Multiphase Flow ◽  
Deep Water ◽  
Flow Characteristics ◽  
Phase Flow ◽  
Separation System ◽  
Successful Operation ◽  
Efficient Tool ◽  
Hydrocarbon Production ◽  
Development Scheme ◽  
Wide Range

The implementation of subsea separation and liquid boosting is becoming a common development scheme for the exploration of deep water fields. Subsea separation system should be reliable to ensure successful operation in a wide range of 3-phase flow regime, without need for developments. A subsea separator can avoid or simplying costly surface platforms of floating vessels, as well as being an efficient tool to enhance hydrocarbon production. One solution of interest is the separation and re-injection of water at the seabed to avoid bringing the water up to the surface facility. In this study, multiphase flow characteristics inside subsea separation system are investigated for the design of subsea separation system.

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