Design of Swirling Flow Submerged Entry Nozzles for Optimal Head Consumption between Tundish and Mold

Tukaguchi, Yuichi; Nakamura, Osamu; Jönson, Pär; Yokoya, Shinichiro; Tanaka, Toshihiro; Hara, Shigeta

doi:info:doi/10.2355/isijinternational.47.1436

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このアイテムへのリンクには次のURLをご利用ください:https://doi.org/10.2355/isijinternational.47.1436

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論文情報

タイトル	Design of Swirling Flow Submerged Entry Nozzles for Optimal Head Consumption between Tundish and Mold
著者	Tukaguchi, Yuichi Tukaguchi, Yuichi
	Nakamura, Osamu Nakamura, Osamu
	Jönson, Pär Jönson, Pär
	Yokoya, Shinichiro Yokoya, Shinichiro
	Tanaka, Toshihiro Tanaka, Toshihiro
	Hara, Shigeta Hara, Shigeta
キーワード等	continuous casting
	submerged entry nozzle
	swirling flow
	swirl blade
	potential energy
	head
	water model
抄録	A technology of swirling flow formation in a submerged entry nozzle is proposed as an effective measure for controlling the flow pattern in a continuous casting mold. As a result of a joint study between Nippon Institute of Technology, Osaka University, Kyushu Refractories, and Sumitomo Metal Industries, swirling flow submerged entry nozzles with a swirl blade for steel slab casting have been developed to improve the productivity of the process and the surface quality of slabs and coils.The swirl blade in the submerged entry nozzle forms the swirling flow expending the potential energy between the tundish and the mold. Thus, the swirl blade and the internal shape of the submerged entry nozzle, which determine the swirling flow rate, should be designed considering the flow rate in the nozzle and the head between the tundish and the mold of the applied casting machine.From full-scale water model experiments, we obtained an empirical equation to estimate the required head between the tundish and the mold from the flow rate, the internal shape of the nozzle, and the specification of the swirl blade. Then, we investigated energy efficiency to create the swirling flow, using an empirical equation from the results of a water model experiment and a numerical analysis of the swirling flow in the nozzle.The obtained empirical equation is valuable to design swirling flow submerged entry nozzles adopted for various casting conditions.
公開者	日本鉄鋼協会
公開者の別表記	The Iron and Steel Institute of Japan
公開者 (ヨミ)	ニホン　テッコウ　キョウカイ
掲載誌名	ISIJ International
巻	47
号	10
開始ページ	1436
終了ページ	1443
刊行年月	2007
ISSN	09151559
NCID	AA10680712
DOI	info:doi/10.2355/isijinternational.47.1436
URL	http://hdl.handle.net/11094/26406
権利情報	© 2007 ISIJ
言語	英語
カテゴリ	学術雑誌論文 Journal Article

著者版フラグ	publisher
NII資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
dcmi資源タイプ	text
DCTERMS.bibliographicCitation	ISIJ International.47(10) P.1436-P.1443
DC.title	Design of Swirling Flow Submerged Entry Nozzles for Optimal Head Consumption between Tundish and Mold
DC.creator	Tukaguchi, Yuichi
	Nakamura, Osamu
	Jönson, Pär
	Yokoya, Shinichiro
	Tanaka, Toshihiro
	Hara, Shigeta
DC.publisher	日本鉄鋼協会
DC.language" scheme="DCTERMS.RFC1766	英語
DCTERMS.issued" scheme="DCTERMS.W3CDTF	2007
DC.identifier	info:doi/10.2355/isijinternational.47.1436
DC.identifier" scheme="DCTERMS.URI	http://hdl.handle.net/11094/26406
DC.subject	continuous casting
	submerged entry nozzle
	swirling flow
	swirl blade
	potential energy
	head
	water model
DCTERMS.abstract	A technology of swirling flow formation in a submerged entry nozzle is proposed as an effective measure for controlling the flow pattern in a continuous casting mold. As a result of a joint study between Nippon Institute of Technology, Osaka University, Kyushu Refractories, and Sumitomo Metal Industries, swirling flow submerged entry nozzles with a swirl blade for steel slab casting have been developed to improve the productivity of the process and the surface quality of slabs and coils.The swirl blade in the submerged entry nozzle forms the swirling flow expending the potential energy between the tundish and the mold. Thus, the swirl blade and the internal shape of the submerged entry nozzle, which determine the swirling flow rate, should be designed considering the flow rate in the nozzle and the head between the tundish and the mold of the applied casting machine.From full-scale water model experiments, we obtained an empirical equation to estimate the required head between the tundish and the mold from the flow rate, the internal shape of the nozzle, and the specification of the swirl blade. Then, we investigated energy efficiency to create the swirling flow, using an empirical equation from the results of a water model experiment and a numerical analysis of the swirling flow in the nozzle.The obtained empirical equation is valuable to design swirling flow submerged entry nozzles adopted for various casting conditions.
DC.rights	© 2007 ISIJ
citation_title	Design of Swirling Flow Submerged Entry Nozzles for Optimal Head Consumption between Tundish and Mold
citation_author	Tukaguchi, Yuichi
	Nakamura, Osamu
	Jönson, Pär
	Yokoya, Shinichiro
	Tanaka, Toshihiro
	Hara, Shigeta
citation_publisher	日本鉄鋼協会
citation_language	英語
citation_date	2007
citation_journal_title	ISIJ International
citation_volume	47
citation_issue	10
citation_firstpage	1436
citation_lastpage	1443
citation_issn	09151559
citation_doi	info:doi/10.2355/isijinternational.47.1436
citation_public_url	http://hdl.handle.net/11094/26406
citation_keywords	continuous casting
	submerged entry nozzle
	swirling flow
	swirl blade
	potential energy
	head
	water model

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