Engine air intake design and evaluation - examples from the Bluecopter™ demonstrator

Engine air intake design and evaluation - examples from the Bluecopter™ demonstrator | 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 Engine air intake design and evaluation - examples from the Bluecopter™ demonstrator Andrea Garavello, Thomas Kneish, Markus Müller, Alessandro D’Alascio This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4750685/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 10 Apr, 2025 Read the published version in CEAS Aeronautical Journal → Version 1 posted You are reading this latest preprint version Abstract The Bluecopter ™ demonstrator was developed to prove the feasibility of future eco-friendly rotorcraft by demonstrating significant reduction of CO 2 emission, fuel consumption and noise. In this context, several different engine air intake configurations were designed and tested, with the aim of improving engine efficiency and reducing fuel consumption, with minimal to no impact on airframe drag. The present paper summarizes the engine intake design, optimization and testing activities carried out in the frame of the Bluecopter project. Helicopter Rotorcraft Engine Turboshaft Intake Propulsion CFD wind tunnel flight tests Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 10 Apr, 2025 Read the published version in CEAS Aeronautical Journal → 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. 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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-4750685","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":332605941,"identity":"b1f54a23-e253-42d3-9698-a38e99d37ac6","order_by":0,"name":"Andrea Garavello","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAABFElEQVRIiWNgGAWjYHACAyR2gQUDPwNjAzMJWgwkGCQbSNZicICBAa8W/tnN2z58qGGw6599+JnEBwMJOePjh9s+F7bVMfC3dydg0yJx51jxzBnHGJJnnEszk5xhIGFsdiaxefbMtsMMEmfObsBqzY0cY2YeNoZkhjMMxsY8BhKJ2w4kNjPzth0AOjIXqxZ5kJY//xiS5c+wfzb+A9Syuf8hSEsdTi0GIC2MbQx2Bmd4DB8DlSVukADbwoxTi+GNtGLG3j6JBMMzPIUPe4B+kbgBtGXGucM8uPwidyN5M8OPbzb2cmfYNxz4UWEjx9+f/pi5oKxOjr+9F7v3oQGX2IAuxINHORjYE1IwCkbBKBgFIxgAAI8EXVNWPDkuAAAAAElFTkSuQmCC","orcid":"","institution":"Airbus Helicopters Deutschland GmbH","correspondingAuthor":true,"prefix":"","firstName":"Andrea","middleName":"","lastName":"Garavello","suffix":""},{"id":332605944,"identity":"052cbe51-8f70-4612-b70b-87538f4258f1","order_by":1,"name":"Thomas Kneish","email":"","orcid":"","institution":"Airbus Helicopters Deutschland GmbH","correspondingAuthor":false,"prefix":"","firstName":"Thomas","middleName":"","lastName":"Kneish","suffix":""},{"id":332605949,"identity":"8b171e1f-7caa-4909-9caf-a251f9d6c30a","order_by":2,"name":"Markus Müller","email":"","orcid":"","institution":"Airbus Helicopters Deutschland GmbH","correspondingAuthor":false,"prefix":"","firstName":"Markus","middleName":"","lastName":"Müller","suffix":""},{"id":332605954,"identity":"dc070bd6-d8a2-44d1-8723-643468175355","order_by":3,"name":"Alessandro D’Alascio","email":"","orcid":"","institution":"Airbus Helicopters Deutschland GmbH","correspondingAuthor":false,"prefix":"","firstName":"Alessandro","middleName":"","lastName":"D’Alascio","suffix":""}],"badges":[],"createdAt":"2024-07-16 15:02:55","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-4750685/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4750685/v1","draftVersion":[],"editorialEvents":[{"content":"https://doi.org/10.1007/s13272-025-00831-4","type":"published","date":"2025-04-10T16:05:33+00:00"}],"editorialNote":"","failedWorkflow":false,"files":[{"id":80558658,"identity":"d164153d-5ea6-4bad-a5fb-55db59881894","added_by":"auto","created_at":"2025-04-14 16:15:40","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1328238,"visible":true,"origin":"","legend":"","description":"","filename":"ERF20230065CEASformat.pdf","url":"https://assets-eu.researchsquare.com/files/rs-4750685/v1_covered_a3c92280-4fbe-4c92-b448-8373c563ba9f.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Engine air intake design and evaluation - examples from the Bluecopter™ demonstrator","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":true,"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":"Helicopter, Rotorcraft, Engine, Turboshaft, Intake, Propulsion, CFD, wind tunnel, flight tests","lastPublishedDoi":"10.21203/rs.3.rs-4750685/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4750685/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThe Bluecopter\u003csup\u003e\u0026trade;\u003c/sup\u003e demonstrator was developed to prove the feasibility of future eco-friendly rotorcraft by demonstrating significant reduction of CO\u003csub\u003e2\u003c/sub\u003e emission, fuel consumption and noise. 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