Effect of boundary layer suction control on the corner separation of linear compressor cascade in a droplet-laden flow

Effect of boundary layer suction control on the corner separation of linear compressor cascade in a droplet-laden flow | 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 Research Article Effect of boundary layer suction control on the corner separation of linear compressor cascade in a droplet-laden flow Deepak Narayanan, Anish Surendran This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6810668/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 This study examines how well boundary layer suction can prevent a highly loadedaxial compressor cascade from cornering out in a droplet-laden flow. SteadyReynolds Averaged Numerical simulations are carried out to examine the impactof various suction slot configurations on the loss coefficient and flowmodifications. It is observed that, when the boundary layer suction is applied alonga portion of the blade span, it minimizes the flow separation locally at that region.Even though this is beneficial, providing a suction slot only a portion of the bladeenhances the flow disturbances. On the other hand, when the suction scheme isemployed on the entire blade span, it considerably increases flow uniformity. Inresponse to the high cross-passage pressure gradient causing persistent three-dimensional corner separation, a combined suction strategy was developed. Thismethod involved the use of a spanwise slot on the suction surface and another onthe endwall, modeled as Flow Extraction and Wall Suction (FEWS). The approachaimed to eliminate separated flow on the blade's suction surface, significantlymitigate 3D corner separation, and improve the uniformity of the flow field. It isobserved that, compared to a dry scenario, a wet environment with a suction flowrate of 1%, significantly lowered the total pressure loss coefficient by 26%. Wet compression Boundary layer suction Corner separation 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. 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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-6810668","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":467562612,"identity":"b8ae82b6-a32e-4355-932f-232914291a1f","order_by":0,"name":"Deepak Narayanan","email":"data:image/png;base64,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","orcid":"","institution":"Ahalia School of Engineering and Technology Palakkad, Kerala","correspondingAuthor":true,"prefix":"","firstName":"Deepak","middleName":"","lastName":"Narayanan","suffix":""},{"id":467562614,"identity":"ce254a60-1ae3-4a08-8a7a-8f6c462fc26c","order_by":1,"name":"Anish Surendran","email":"","orcid":"","institution":"National Institute of Technology Karnataka","correspondingAuthor":false,"prefix":"","firstName":"Anish","middleName":"","lastName":"Surendran","suffix":""}],"badges":[],"createdAt":"2025-06-03 11:23:16","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-6810668/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-6810668/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":89573801,"identity":"43b38346-6e23-4673-9a29-f80c445f7037","added_by":"auto","created_at":"2025-08-21 12:47:29","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":29366415,"visible":true,"origin":"","legend":"","description":"","filename":"Manuscriptrevised2.pdf","url":"https://assets-eu.researchsquare.com/files/rs-6810668/v1_covered_64b4897e-8968-4799-8342-ac070d2bee4f.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Effect of boundary layer suction control on the corner separation of linear compressor cascade in a droplet-laden flow","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":"Wet compression, Boundary layer suction, Corner separation","lastPublishedDoi":"10.21203/rs.3.rs-6810668/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-6810668/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"This study examines how well boundary layer suction can prevent a highly loadedaxial compressor cascade from cornering out in a droplet-laden flow. 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The approachaimed to eliminate separated flow on the blade's suction surface, significantlymitigate 3D corner separation, and improve the uniformity of the flow field. 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