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Modeling of fluid flow and heat transfer characteristics in AOD nozzles
KTH, Superseded Departments, Metallurgy.ORCID iD: 0000-0003-1919-9964
2000 (English)Licentiate thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: KTH , 2000. , iv, 23 p.
Series
Trita-MET, 076
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-1104ISRN: KTH/MET/R--00/76--SEOAI: oai:DiVA.org:kth-1104DiVA: diva2:6886
Note
QC 20100916Available from: 2000-09-26 Created: 2000-09-26 Last updated: 2010-09-16Bibliographically approved
List of papers
1. A nozzle model considering the effect of density variations using the equation of state
Open this publication in new window or tab >>A nozzle model considering the effect of density variations using the equation of state
(English)In: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916Article in journal (Other academic) Submitted
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-24561 (URN)
Note
QS 20120327Available from: 2010-09-16 Created: 2010-09-16 Last updated: 2017-12-12Bibliographically approved
2. An experimental and numerical study of fluid flow in AOD Nozzles
Open this publication in new window or tab >>An experimental and numerical study of fluid flow in AOD Nozzles
2002 (English)In: Iron & steelmaker, ISSN 0275-8687, Vol. 29, no 2, 51-57 p.Article in journal (Refereed) Published
Abstract [en]

A mathematical model of a nozzle used in AOD converters was developed in a previous study. In the work covered in this article, an attempt was made to verify velocity predictions from the nozzle model through a comparison of measurements. Experiments were performed at AGA AB's laboratories using a laser doppler anemometer (LDA) to measure axial velocities at the outlet of a nozzle having the same dimensions as nozzles used in industrial AOD converters. The model predictions agreed well with measured data. An attempt was also made to compare turbulent kinetic energy predictions from the k-ε turbulence model with turbulence predictions calculated using an analytical expression that uses measured velocity fluctuation values. The positive results from this comparison indicate that the model can produce fairly reliable predictions of turbulence at the nozzle outlet. The results from this study are promising regarding use of the nozzle model to calculate boundary condition input values pertaining to the nozzle inlet that will be required for an AOD converter model currently being developed.

Keyword
Theoretical study, Oxygen converter, Oxygen steel plant, Steel, Flow(fluid), Mathematical model, Modeling, Numerical simulation
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-24560 (URN)
Note
QC 20100916Available from: 2010-09-16 Created: 2010-09-16 Last updated: 2010-09-16Bibliographically approved
3. Effect of Ar/O-2 gas mixtures on heat-transfer and fluid-flow characteristics in AOD nozzles
Open this publication in new window or tab >>Effect of Ar/O-2 gas mixtures on heat-transfer and fluid-flow characteristics in AOD nozzles
2000 (English)In: Steel research, ISSN 0177-4832, Vol. 71, no 11, 429-434 p.Article in journal (Refereed) Published
Abstract [en]

A model of fluid flow and heat transfer in a nozzle used for injection of argon and oxygen in AOD converters was developed earlier. In this study the model was used to determine the effect of changes in the ratio of argon to oxygen in argon-oxygen gas mixtures injected through the nozzle on fluid flow and heat transfer. It was found, for the studied conditions, that the temperature and laminar kinematic viscosity at the nozzle outlet were not dependent on the gas composition. However, the velocity, density, turbulent kinetic energy and dissipation of kinetic energy varied with a change in the fraction of oxygen injected. It is therefore concluded that for use as boundary-condition input data for an AOD converter model (under development), it is important to be able to calculate reliable velocity and turbulence parameter data for gas mixtures of different argon/oxygen ratios.

National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-20286 (URN)000166394300001 ()
Note

QC 20100525

NR 20140804Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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