Analysis of Cavitation Flow and Energy Characteristics of Space Micro Pump under a Wide Temperature Range

Analysis of Cavitation Flow and Energy Characteristics of Space Micro Pump under a Wide Temperature Range | 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 Analysis of Cavitation Flow and Energy Characteristics of Space Micro Pump under a Wide Temperature Range Chuanchao Wang, Deyou Li, Qi Yang, Zhiwei Liu, Xiaolong Fu, Jintao Liu, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8973167/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 space micro pump has a wide temperature range, and it experiences obvious thermodynamic effects during the high-temperature cavitation process, which leads to complex flow characteristics. To evaluate the influence of different temperatures on the cavitation flow within the space micro pump, the shear-stress transport k-ω turbulence model (SST k-ω ) and the Zwart-Gerbera-Belamri cavitation model (ZGB) corrected based on thermodynamic effects were used to conduct numerical simulations of the flow channels within the space micro pump. The physical parameters were coupled with temperature to study the cavitation flow in the space micropump over a wide temperature range, and the influence of the wide temperature range on cavitation flow was revealed. The results showed that at high temperatures, the thermodynamic effects manifested as a reduction in the saturated vapor pressure of the cavitation region, a delay in the development of cavitation cavities, a decrease in the vapor volume fraction, and a reduction in the negative impact of cavitation on the performance of micropumps owing to a decrease in viscosity at high temperatures. Moreover, the inhibitory effect of the thermodynamic effects did not increase simultaneously with an increase in temperature. Furthermore, cavitation increased flow losses, whereas following the temperature increase, cavitation inhibition and a decrease in viscosity worked together to reduce this loss. wide temperature range space micro pump cavitation flow thermodynamic effect hydraulic loss Full Text Supplementary Files Highlights.docx 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-8973167","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":604430107,"identity":"a79c040c-5e8a-4627-b87d-39c804d9f2ef","order_by":0,"name":"Chuanchao 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loss","lastPublishedDoi":"10.21203/rs.3.rs-8973167/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-8973167/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThe space micro pump has a wide temperature range, and it experiences obvious thermodynamic effects during the high-temperature cavitation process, which leads to complex flow characteristics. To evaluate the influence of different temperatures on the cavitation flow within the space micro pump, the shear-stress transport \u003cem\u003ek-ω\u003c/em\u003e turbulence model (SST \u003cem\u003ek-ω\u003c/em\u003e) and the Zwart-Gerbera-Belamri cavitation model (ZGB) corrected based on thermodynamic effects were used to conduct numerical simulations of the flow channels within the space micro pump. The physical parameters were coupled with temperature to study the cavitation flow in the space micropump over a wide temperature range, and the influence of the wide temperature range on cavitation flow was revealed. The results showed that at high temperatures, the thermodynamic effects manifested as a reduction in the saturated vapor pressure of the cavitation region, a delay in the development of cavitation cavities, a decrease in the vapor volume fraction, and a reduction in the negative impact of cavitation on the performance of micropumps owing to a decrease in viscosity at high temperatures. Moreover, the inhibitory effect of the thermodynamic effects did not increase simultaneously with an increase in temperature. 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