Flow characteristics of a high-intensity cooling header pipe used to cool hot-rolled strips

Flow characteristics of a high-intensity cooling header pipe used to cool hot-rolled strips | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Flow characteristics of a high-intensity cooling header pipe used to cool hot-rolled strips Jian Wang, Jianhui Shi, Xuemei Sun, Chuntian Xu This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5841587/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract High intensity cooling header is a key equipment in the after rolling cooling process for hot rolled strip. Notably, the internal flow characteristics of the header significantly affect the quality and efficiency of cooling. This study examined the influence of slot outlet shape on the flow characteristics of a high-intensity cooling header pipe during the post-rolling cooling process of a hot-rolled strip. The main dimensionless parameters were buffer platform height versus slot height ( h 3 / h 2 ) and chamfer height versus slot height ( h 4 / h 2 ). Through numerical simulations using FLUENT, the influence of four different outlet shapes on the magnitude and uniformity of outlet velocity were calculated at an inlet pressure of 0.5 MPa. The results showed that type I, II, and III nozzles provide better velocity enhancement than conventional rectangular nozzles. When the outlet cross-section width ( w 1 ) and slit height ( h 2 ) were set to 2 mm and 5 mm, respectively, certain changes to the slot chamfer size, angle, and shrinkage angle ( α ) increased the average jet velocity in the central region by about 20% when compared to the use of a rectangular nozzle, and the velocity differences were also reduced by about 50%. When h 2 was 10 mm, the effect of chamfer size, angle, and shrinkage angle ( α ) on the magnitude of the outlet velocity tended to increase. These findings demonstrate the influence of outlet shape on the flow characteristics of high-intensity cooling headers, guiding improvements in the performance of these equipment. Physical sciences/Engineering/Mechanical engineering Physical sciences/Materials science/Materials for devices/Fluidics Physical sciences/Materials science/Structural materials/Mechanical properties nozzle outlet shape flow characteristics numerical simulation Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-5841587","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":406170257,"identity":"a3109c8f-5a74-4b01-aff0-ff2a78e18a3c","order_by":0,"name":"Jian Wang","email":"","orcid":"","institution":"University of Science and Technology Liaoning","correspondingAuthor":false,"prefix":"","firstName":"Jian","middleName":"","lastName":"Wang","suffix":""},{"id":406170258,"identity":"32b400f0-5dcf-47a7-b9df-fdb071592efc","order_by":1,"name":"Jianhui Shi","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA10lEQVRIie3RsQrCMBSF4VsEdQi4VgLtEwhXAk7SZzEU6trRMaXgJLim+BJOzpGCLtFZN4uDa0cHQaubUzIK5p/PN9wEwOX6yTSUdxyTXifLLrUl8a6QJkF/UeZDaUdIi0FdMjxN57RrA8LssKMptnhRVIICRMFAGAiqY0IltvmScsFSiNlImQjokU+Q8GLFRSxB8Y2JhOJDfL4+b0VJbAgozRhBbM73styKoNLDSuKkeWSeexItbgmlRlU/ns1X7m/3ehYFRgL+1wJN83c9YbNyuVyuv+4FGQFJk/Qz9CEAAAAASUVORK5CYII=","orcid":"","institution":"Linyi University","correspondingAuthor":true,"prefix":"","firstName":"Jianhui","middleName":"","lastName":"Shi","suffix":""},{"id":406170259,"identity":"fd676ff7-edcf-4d38-86ba-9fae35d64c39","order_by":2,"name":"Xuemei Sun","email":"","orcid":"","institution":"Linyi University","correspondingAuthor":false,"prefix":"","firstName":"Xuemei","middleName":"","lastName":"Sun","suffix":""},{"id":406170260,"identity":"870ce90f-6bec-4004-975e-abee861e6cb8","order_by":3,"name":"Chuntian Xu","email":"","orcid":"","institution":"University of Science and Technology Liaoning","correspondingAuthor":false,"prefix":"","firstName":"Chuntian","middleName":"","lastName":"Xu","suffix":""}],"badges":[],"createdAt":"2025-01-16 11:53:17","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-5841587/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-5841587/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":84278027,"identity":"d4fed98c-5e6a-4d59-a223-a9ea3c459972","added_by":"auto","created_at":"2025-06-10 06:04:06","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1350032,"visible":true,"origin":"","legend":"","description":"","filename":"ManuscriptsRevised.pdf","url":"https://assets-eu.researchsquare.com/files/rs-5841587/v1_covered_b85c3975-ba80-420e-9b16-bfff36aad847.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Flow characteristics of a high-intensity cooling header pipe used to cool hot-rolled strips","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"nozzle, outlet shape, flow characteristics, numerical simulation","lastPublishedDoi":"10.21203/rs.3.rs-5841587/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-5841587/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eHigh intensity cooling header is a key equipment in the after rolling cooling process for hot rolled strip. Notably, the internal flow characteristics of the header significantly affect the quality and efficiency of cooling. This study examined the influence of slot outlet shape on the flow characteristics of a high-intensity cooling header pipe during the post-rolling cooling process of a hot-rolled strip. The main dimensionless parameters were buffer platform height versus slot height (\u003cem\u003eh\u003c/em\u003e\u003csub\u003e3\u003c/sub\u003e/\u003cem\u003eh\u003c/em\u003e\u003csub\u003e2\u003c/sub\u003e) and chamfer height versus slot height (\u003cem\u003eh\u003c/em\u003e\u003csub\u003e4\u003c/sub\u003e/\u003cem\u003eh\u003c/em\u003e\u003csub\u003e2\u003c/sub\u003e). Through numerical simulations using FLUENT, the influence of four different outlet shapes on the magnitude and uniformity of outlet velocity were calculated at an inlet pressure of 0.5 MPa. The results showed that type I, II, and III nozzles provide better velocity enhancement than conventional rectangular nozzles. When the outlet cross-section width (\u003cem\u003ew\u003c/em\u003e\u003csub\u003e1\u003c/sub\u003e) and slit height (\u003cem\u003eh\u003c/em\u003e\u003csub\u003e2\u003c/sub\u003e) were set to 2 mm and 5 mm, respectively, certain changes to the slot chamfer size, angle, and shrinkage angle (\u003cem\u003eα\u003c/em\u003e) increased the average jet velocity in the central region by about 20% when compared to the use of a rectangular nozzle, and the velocity differences were also reduced by about 50%. When \u003cem\u003eh\u003c/em\u003e\u003csub\u003e2\u003c/sub\u003e was 10 mm, the effect of chamfer size, angle, and shrinkage angle (\u003cem\u003eα\u003c/em\u003e) on the magnitude of the outlet velocity tended to increase. These findings demonstrate the influence of outlet shape on the flow characteristics of high-intensity cooling headers, guiding improvements in the performance of these equipment.\u003c/p\u003e","manuscriptTitle":"Flow characteristics of a high-intensity cooling header pipe used to cool hot-rolled strips","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-01-28 07:30:39","doi":"10.21203/rs.3.rs-5841587/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"69425864-ff9d-4205-83dd-abf71fc76cf9","owner":[],"postedDate":"January 28th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":43312625,"name":"Physical sciences/Engineering/Mechanical engineering"},{"id":43312626,"name":"Physical sciences/Materials science/Materials for devices/Fluidics"},{"id":43312627,"name":"Physical sciences/Materials science/Structural materials/Mechanical properties"}],"tags":[],"updatedAt":"2025-06-10T05:39:03+00:00","versionOfRecord":[],"versionCreatedAt":"2025-01-28 07:30:39","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-5841587","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-5841587","identity":"rs-5841587","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}