Coalescence characteristics of supersonic jets from multi-nozzle oxygen lance in steelmaking BOF

Mingming Li, Qiang Li, Shibo Kuang, Zongshu Zou

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Hydrodynamic behaviors of multiple supersonic jets, especially their coalescence, are of paramount importance to effective design and operation of the oxygen lance in steelmaking basic oxygen furnace (BOF) but not well understood. This paper presents a numerical study on the coalescence of supersonic jets from the multi-nozzle oxygen lance at a practical Mach number by a compressible and non-isothermal computational fluid dynamics model. The model is firstly validated and then used to study the effects of key variables (i.e. ambient temperature and arrangement of nozzles including inclination angle and number) on coalescence behavior under various operational conditions. The results show that the jets prefer to deviate from their own nozzle axes and tend to coalescence with decreasing ambient temperature/nozzle inclination angle or increasing nozzle number. The attenuations of the velocity and dynamic pressure at the jet centerline are delayed with the increase of ambient temperature or the decrease of nozzle number/inclination angle. The critical condition where the jets are free from interaction is identified with increasing nozzle inclination angle, and the critical value is 25? for the four-nozzle lance considered. The simulation results are then used to estimate the cavity shape and splashing modes in BOFs.
Original languageEnglish
Pages (from-to)1517-1529
Number of pages13
JournalSteel Research International
Volume86
Issue number12
DOIs
Publication statusPublished - 2015
Externally publishedYes

Cite this

@article{785b1a4f7b0741d6a388d0518225efd3,
title = "Coalescence characteristics of supersonic jets from multi-nozzle oxygen lance in steelmaking BOF",
abstract = "Hydrodynamic behaviors of multiple supersonic jets, especially their coalescence, are of paramount importance to effective design and operation of the oxygen lance in steelmaking basic oxygen furnace (BOF) but not well understood. This paper presents a numerical study on the coalescence of supersonic jets from the multi-nozzle oxygen lance at a practical Mach number by a compressible and non-isothermal computational fluid dynamics model. The model is firstly validated and then used to study the effects of key variables (i.e. ambient temperature and arrangement of nozzles including inclination angle and number) on coalescence behavior under various operational conditions. The results show that the jets prefer to deviate from their own nozzle axes and tend to coalescence with decreasing ambient temperature/nozzle inclination angle or increasing nozzle number. The attenuations of the velocity and dynamic pressure at the jet centerline are delayed with the increase of ambient temperature or the decrease of nozzle number/inclination angle. The critical condition where the jets are free from interaction is identified with increasing nozzle inclination angle, and the critical value is 25? for the four-nozzle lance considered. The simulation results are then used to estimate the cavity shape and splashing modes in BOFs.",
author = "Mingming Li and Qiang Li and Shibo Kuang and Zongshu Zou",
year = "2015",
doi = "10.1002/srin.201400506",
language = "English",
volume = "86",
pages = "1517--1529",
journal = "Steel Research International",
issn = "1611-3683",
publisher = "Wiley-VCH Verlag GmbH & Co. KGaA",
number = "12",

}

Coalescence characteristics of supersonic jets from multi-nozzle oxygen lance in steelmaking BOF. / Li, Mingming; Li, Qiang; Kuang, Shibo; Zou, Zongshu.

In: Steel Research International, Vol. 86, No. 12, 2015, p. 1517-1529.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Coalescence characteristics of supersonic jets from multi-nozzle oxygen lance in steelmaking BOF

AU - Li, Mingming

AU - Li, Qiang

AU - Kuang, Shibo

AU - Zou, Zongshu

PY - 2015

Y1 - 2015

N2 - Hydrodynamic behaviors of multiple supersonic jets, especially their coalescence, are of paramount importance to effective design and operation of the oxygen lance in steelmaking basic oxygen furnace (BOF) but not well understood. This paper presents a numerical study on the coalescence of supersonic jets from the multi-nozzle oxygen lance at a practical Mach number by a compressible and non-isothermal computational fluid dynamics model. The model is firstly validated and then used to study the effects of key variables (i.e. ambient temperature and arrangement of nozzles including inclination angle and number) on coalescence behavior under various operational conditions. The results show that the jets prefer to deviate from their own nozzle axes and tend to coalescence with decreasing ambient temperature/nozzle inclination angle or increasing nozzle number. The attenuations of the velocity and dynamic pressure at the jet centerline are delayed with the increase of ambient temperature or the decrease of nozzle number/inclination angle. The critical condition where the jets are free from interaction is identified with increasing nozzle inclination angle, and the critical value is 25? for the four-nozzle lance considered. The simulation results are then used to estimate the cavity shape and splashing modes in BOFs.

AB - Hydrodynamic behaviors of multiple supersonic jets, especially their coalescence, are of paramount importance to effective design and operation of the oxygen lance in steelmaking basic oxygen furnace (BOF) but not well understood. This paper presents a numerical study on the coalescence of supersonic jets from the multi-nozzle oxygen lance at a practical Mach number by a compressible and non-isothermal computational fluid dynamics model. The model is firstly validated and then used to study the effects of key variables (i.e. ambient temperature and arrangement of nozzles including inclination angle and number) on coalescence behavior under various operational conditions. The results show that the jets prefer to deviate from their own nozzle axes and tend to coalescence with decreasing ambient temperature/nozzle inclination angle or increasing nozzle number. The attenuations of the velocity and dynamic pressure at the jet centerline are delayed with the increase of ambient temperature or the decrease of nozzle number/inclination angle. The critical condition where the jets are free from interaction is identified with increasing nozzle inclination angle, and the critical value is 25? for the four-nozzle lance considered. The simulation results are then used to estimate the cavity shape and splashing modes in BOFs.

U2 - 10.1002/srin.201400506

DO - 10.1002/srin.201400506

M3 - Article

VL - 86

SP - 1517

EP - 1529

JO - Steel Research International

JF - Steel Research International

SN - 1611-3683

IS - 12

ER -