Research on Perforated-Drainage-Based Active Flow Control for Gas Blockage Mitigation in Multiphase Mixed-transport Pumps

Research on Perforated-Drainage-Based Active Flow Control for Gas Blockage Mitigation in Multiphase Mixed-transport Pumps | 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 Research on Perforated-Drainage-Based Active Flow Control for Gas Blockage Mitigation in Multiphase Mixed-transport Pumps Wei Han, Yulan Bu, Rennian Li, Wangxu LI, Yubin This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8683975/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 The helical axial multiphase pump is a key device in deep-sea oil extraction, where the internal gas-liquid two-phase flow is highly complex. Under high gas volume fraction conditions, intermittent gas blockage occurs, which directly compromises pumping efficiency. To address this issue, an active flow control strategy based on perforated drainage holes was employed. Using an orthogonal experimental design, in combination with numerical simulations and experimental validation, the effects of geometric parameters of the drainage structure on pump performance and gas blockage were systematically investigated. The results indicate that the inclination angle of the drainage holes exerts a stronger influence on pump performance than other structural parameters. At high gas volume fraction, the drainage structure significantly improves pump efficiency. An appropriate inclination allows the drainage direction to better align with the local streamlines, thereby reducing additional energy losses, alleviating gas accumulation near the hub on the suction-side blade trailing edge, and effectively dispersing bubble clusters. Conversely, excessively small angles fail to generate sufficient shear to disrupt gas aggregation, while overly large angles misalign with the flow, inducing separation and increasing energy dissipation. The optimal performance was achieved at an inclination angle of 20°, where the pump efficiency reached its maximum. Energy Engineering Ocean Engineering Petroleum Engineering Helical axial multiphase pump Perforated drainage flow control Gas-liquid two-phase flow Drainage hole inclination angle Full Text Additional Declarations The authors declare no competing interests. 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. 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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-8683975","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":579669729,"identity":"359c6c56-ded4-4aa7-a8be-baf69d634041","order_by":0,"name":"Wei Han","email":"","orcid":"","institution":"Lanzhou University of Technology","correspondingAuthor":false,"prefix":"","firstName":"Wei","middleName":"","lastName":"Han","suffix":""},{"id":579670286,"identity":"ece8a922-745f-4afe-bb6b-7768dba5c59e","order_by":1,"name":"Yulan 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Under high gas volume fraction conditions, intermittent gas blockage occurs, which directly compromises pumping efficiency. To address this issue, an active flow control strategy based on perforated drainage holes was employed. Using an orthogonal experimental design, in combination with numerical simulations and experimental validation, the effects of geometric parameters of the drainage structure on pump performance and gas blockage were systematically investigated. The results indicate that the inclination angle of the drainage holes exerts a stronger influence on pump performance than other structural parameters. At high gas volume fraction, the drainage structure significantly improves pump efficiency. An appropriate inclination allows the drainage direction to better align with the local streamlines, thereby reducing additional energy losses, alleviating gas accumulation near the hub on the suction-side blade trailing edge, and effectively dispersing bubble clusters. Conversely, excessively small angles fail to generate sufficient shear to disrupt gas aggregation, while overly large angles misalign with the flow, inducing separation and increasing energy dissipation. 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