Study of pressure pulsation on reactor coolant pump with staggered guide vane under coast-down condition

Study of pressure pulsation on reactor coolant pump with staggered guide vane under coast-down condition | 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 Study of pressure pulsation on reactor coolant pump with staggered guide vane under coast-down condition Rui Deng, Daoxing Ye, Junlin Chen, Junyu Zhang, Jiaming Han, Mengke Wu, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4419542/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 To explore the impact of staggered guide vane on hydraulic characteristics of reactor coolant pump during coast-down condition, numerical methods were employed to study the reactor coolant pump equipped with staggered guide vane. The results show that the amplitude of impeller pressure pulsation can be reduced by staggered guide vane, the amplitude of pressure pulsation at guide vane inlet can be decreased, and the pressure pulsation amplitude within the volute casing can be improved. The energy of pressure pulsation generated by static and dynamic interference can be redistributed by staggered guide vane, leading to a reduction in the intensity of pressure pulsation. The maximum amplitude of radial force of impeller is located at the rotation frequency of impeller, compared with the original model, the difference of amplitude decreases as the coast-down progresses. At the start of coast-down, the radial force amplitude of impeller was reduced to 403N by the staggered guide vane, and when the coast-down flow rate decreases to 0.25Q 0 , the difference of radial force amplitude is only 22N. The radial force amplitude of impeller was effectively reduced by the staggered guide vane, and its distribution was made more uniform. However, as coast-down progresses, the improvement effect gradually diminishes. Physical sciences/Engineering Physical sciences/Engineering/Mechanical engineering reactor coolant pump coast-down process staggered guide vane hydraulic characteristics pressure pulsation radial force 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-4419542","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":310021054,"identity":"62e518f0-4c63-404b-95dc-fbc8f40e139a","order_by":0,"name":"Rui Deng","email":"","orcid":"","institution":"Xihua University","correspondingAuthor":false,"prefix":"","firstName":"Rui","middleName":"","lastName":"Deng","suffix":""},{"id":310021055,"identity":"26e50c69-703c-4585-9fe5-9708eed7ca1e","order_by":1,"name":"Daoxing 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The results show that the amplitude of impeller pressure pulsation can be reduced by staggered guide vane, the amplitude of pressure pulsation at guide vane inlet can be decreased, and the pressure pulsation amplitude within the volute casing can be improved. The energy of pressure pulsation generated by static and dynamic interference can be redistributed by staggered guide vane, leading to a reduction in the intensity of pressure pulsation. The maximum amplitude of radial force of impeller is located at the rotation frequency of impeller, compared with the original model, the difference of amplitude decreases as the coast-down progresses. At the start of coast-down, the radial force amplitude of impeller was reduced to 403N by the staggered guide vane, and when the coast-down flow rate decreases to 0.25Q 0 , the difference of radial force amplitude is only 22N. The radial force amplitude of impeller was effectively reduced by the staggered guide vane, and its distribution was made more uniform. 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