Development of Flow Field and Temperature Distribution during Changing Divergent Angle of the Nozzle When Using Swirl Flow in a Square Continuous Casting Billet Mould
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概要
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Recently, positive effects of swirl flow have been investigated, related to specific billet moulds with particular divergent angles in the immersion nozzles.1–7) Literature review showed that a systematic study of changes in the divergent angle in the immersion nozzle for continuous casting moulds had not been carried out. Therefore, in the present work we aim to investigate the development of flow field and temperature distribution inside the mould and on the meniscus while changing the divergent angle of the immersion nozzle. Swirl flow was used in the nozzle and the liquid entered a 3D square billet mould. Both physical and mathematical modelling was carried out to simulate nine different divergent angles between 0 and 160°. The overall results of the study showed that a change in divergent angle has an effect on the flow pattern as well as the temperature distribution of the liquid steel in the mould.More specifically it was found that in the case of 100° divergent angle nozzle billet we can observe a major shift of lower circulation compared to that of the 80° nozzle billet. Furthermore, a noticeable increase of the temperature near the meniscus, for a square billet, and radial velocity component, for a round billet, was found when using the 100° divergent angle nozzle compared to the 80° divergent angle nozzle. Additionally, a uniform velocity and heat distribution was observed within a distance of 200 mm below the nozzle exit for nozzle outlets with 100° divergent angles and larger.
- 社団法人 日本鉄鋼協会の論文
- 2007-01-15
著者
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TAKAGI Shigeo
Department of Mechanical Engineering, Nihon Institute of Technology
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Jönsson Pär
Division of Applied Process Metallurgy, Royal Institute of Technology
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Yokoya Shinichiro
Div. Of Applied Process Metallurgy Royal Inst. Of Technol.
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Takagi Shigeo
Department Of Electrical Engineering Faculty Of Engneering Shizuoka University
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Takagi Shigeo
Department Of Mechanical Engineering Nippon Institute Of Technology
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JONSSON Lage
Division of Applied Process Metallurgy, Royal Institute of Technology
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Jonsson Lage
Division Of Applied Process Metallurgy Kth
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YOKOYA Shinichiro
Division of Applied Process Metallurgy, KTH
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Joensson Paer
Royal Inst. Of Technol. (kth) Stockholm Swe
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Jonsson Par
Division Of Applied Process Metallurgy Kth
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Jonsson Par
Division Of Applied Process Metallurgy Department Of Materials Science And Engineering Royal Institu
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Jonsson Lage
Division Of Applied Process Metallurgy Royal Institute Of Technology
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KHOLMATOV Shavkat
Division of Applied Process Metallurgy, Royal Institute of Technology
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Yokoya Shinichiro
Division Of Applied Process Metallurgy
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Yokoya Shinichiro
Division Of Applied Process Metallurgy Royal Institute Of Technology (kth)
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Kholmatov Shavkat
Division Of Applied Process Metallurgy Royal Institute Of Technology
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