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Research on the Hydraulic Excitation Characteristics of the Top Cover Caused by the Radial Installation Deviation of the Seal of a 1GW Francis Turbine
The radial installation deviation of the turbine runner will change the gap flow between the upper crown and the lower ring seal, which will affect the radial force of the runner and the hydraulic excitation characteristics of the top cover. This research focuses on the 1GW Francis turbine on the ri...
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Published in: | Processes 2023-11, Vol.11 (11), p.3172 |
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description | The radial installation deviation of the turbine runner will change the gap flow between the upper crown and the lower ring seal, which will affect the radial force of the runner and the hydraulic excitation characteristics of the top cover. This research focuses on the 1GW Francis turbine on the right bank of the Baihetan hydropower station. The pressure distribution along the circumference of the top cover was analyzed, and the effects of deviations on the specific generation of hydraulic excitation forces were studied. This research shows that the increase in radial deviation will slightly reduce the output and efficiency, and the radial force on the runner increases parabolically. When the radial deviation is 1.5 mm, the radial force is 5.9 times higher compared to the case without any deviation, and the radius of the fitting circle of the radial force behavior trajectory increases with the increase in radial deviation. In addition, the radial deviation has little effect on the internal flow of the runner and the pressure distribution in the upper crown chamber. The dominant frequency components at the upstream monitoring points include fn, 15 fn, 24 fn, and 30 fn. The dominant frequency components at the downstream monitoring points include the blade passing frequencies of 15 fn and 30 fn. However, with the increase in radial deviation, the fluctuation amplitudes exhibit an asymmetric distribution, the uniformity of the pressure distribution in the circumferential direction of the labyrinth seal area becomes significantly worse, and the waveform of the downstream monitoring points changes significantly and presents a non-uniform distribution in one rotation cycle. |
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This research focuses on the 1GW Francis turbine on the right bank of the Baihetan hydropower station. The pressure distribution along the circumference of the top cover was analyzed, and the effects of deviations on the specific generation of hydraulic excitation forces were studied. This research shows that the increase in radial deviation will slightly reduce the output and efficiency, and the radial force on the runner increases parabolically. When the radial deviation is 1.5 mm, the radial force is 5.9 times higher compared to the case without any deviation, and the radius of the fitting circle of the radial force behavior trajectory increases with the increase in radial deviation. In addition, the radial deviation has little effect on the internal flow of the runner and the pressure distribution in the upper crown chamber. The dominant frequency components at the upstream monitoring points include fn, 15 fn, 24 fn, and 30 fn. The dominant frequency components at the downstream monitoring points include the blade passing frequencies of 15 fn and 30 fn. However, with the increase in radial deviation, the fluctuation amplitudes exhibit an asymmetric distribution, the uniformity of the pressure distribution in the circumferential direction of the labyrinth seal area becomes significantly worse, and the waveform of the downstream monitoring points changes significantly and presents a non-uniform distribution in one rotation cycle.</description><identifier>ISSN: 2227-9717</identifier><identifier>EISSN: 2227-9717</identifier><identifier>DOI: 10.3390/pr11113172</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Analysis ; Carbon ; Cavitation ; Deviation ; Efficiency ; Excitation ; Hydraulics ; Hydroelectric power ; Hydroelectric power stations ; Internal flow ; Investigations ; Labyrinth seals ; Monitoring ; Pressure distribution ; Simulation ; Skewed distributions ; Thrust bearings ; Turbines ; Turbulence models ; Vortices ; Water-power ; Waveforms</subject><ispartof>Processes, 2023-11, Vol.11 (11), p.3172</ispartof><rights>COPYRIGHT 2023 MDPI AG</rights><rights>2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c293t-af441e4df059fa02d005df927b574b70b1aad972c0d352003f51319fcc39c9ae3</cites><orcidid>0000-0002-2671-9297 ; 0000-0003-3983-4742 ; 0000-0002-7333-8454</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.proquest.com/docview/2893339643/fulltextPDF?pq-origsite=primo$$EPDF$$P50$$Gproquest$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.proquest.com/docview/2893339643?pq-origsite=primo$$EHTML$$P50$$Gproquest$$Hfree_for_read</linktohtml><link.rule.ids>314,780,784,25752,27923,27924,37011,44589,74997</link.rule.ids></links><search><creatorcontrib>Jin, Kun</creatorcontrib><creatorcontrib>Lu, Yonggang</creatorcontrib><creatorcontrib>Lin, Peng</creatorcontrib><creatorcontrib>Zhang, Zequan</creatorcontrib><creatorcontrib>Li, Juan</creatorcontrib><creatorcontrib>Zhao, Yun</creatorcontrib><creatorcontrib>Huang, Xingxing</creatorcontrib><creatorcontrib>Wang, Zhengwei</creatorcontrib><title>Research on the Hydraulic Excitation Characteristics of the Top Cover Caused by the Radial Installation Deviation of the Seal of a 1GW Francis Turbine</title><title>Processes</title><description>The radial installation deviation of the turbine runner will change the gap flow between the upper crown and the lower ring seal, which will affect the radial force of the runner and the hydraulic excitation characteristics of the top cover. 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The dominant frequency components at the downstream monitoring points include the blade passing frequencies of 15 fn and 30 fn. However, with the increase in radial deviation, the fluctuation amplitudes exhibit an asymmetric distribution, the uniformity of the pressure distribution in the circumferential direction of the labyrinth seal area becomes significantly worse, and the waveform of the downstream monitoring points changes significantly and presents a non-uniform distribution in one rotation cycle.</description><subject>Analysis</subject><subject>Carbon</subject><subject>Cavitation</subject><subject>Deviation</subject><subject>Efficiency</subject><subject>Excitation</subject><subject>Hydraulics</subject><subject>Hydroelectric power</subject><subject>Hydroelectric power stations</subject><subject>Internal flow</subject><subject>Investigations</subject><subject>Labyrinth seals</subject><subject>Monitoring</subject><subject>Pressure distribution</subject><subject>Simulation</subject><subject>Skewed distributions</subject><subject>Thrust bearings</subject><subject>Turbines</subject><subject>Turbulence models</subject><subject>Vortices</subject><subject>Water-power</subject><subject>Waveforms</subject><issn>2227-9717</issn><issn>2227-9717</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid>PIMPY</sourceid><recordid>eNpNUdtKBDEMLaKgrL74BQXfhNVeZqx9lPEKgqArPg6ZNnUr43RtO-L-iN9rdQRNHnJIzknghJB9zo6k1Ox4FXkJyZXYIDtCCDXXiqvNf3ib7KX0wkpoLk_rkx3yeY8JIZolDQPNS6TXaxth7L2hFx_GZ8i-DJolRDAZo0_Zm0SD--Euwoo24R0jbWBMaGm3_unfg_XQ05shZej7acU5vvsJ_YofsFAKBsqvnuhlhMH4RBdj7PyAu2TLQZ9w77fOyOPlxaK5nt_eXd00Z7dzI7TMc3BVxbGyjtXaAROWsdo6LVRXq6pTrOMAVithmJW1YEy6uvijnTFSGw0oZ-Rg2ruK4W3ElNuXMMahnGzFqZbF1pNKFtbRxHqGHls_uJCLHSUtvnoTBnS-9M-UqqSoq6KYkcNJYGJIKaJrV9G_Qly3nLXfv2r_fiW_AMfOhpA</recordid><startdate>20231101</startdate><enddate>20231101</enddate><creator>Jin, Kun</creator><creator>Lu, Yonggang</creator><creator>Lin, Peng</creator><creator>Zhang, Zequan</creator><creator>Li, Juan</creator><creator>Zhao, Yun</creator><creator>Huang, Xingxing</creator><creator>Wang, Zhengwei</creator><general>MDPI AG</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FH</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>LK8</scope><scope>M7P</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><orcidid>https://orcid.org/0000-0002-2671-9297</orcidid><orcidid>https://orcid.org/0000-0003-3983-4742</orcidid><orcidid>https://orcid.org/0000-0002-7333-8454</orcidid></search><sort><creationdate>20231101</creationdate><title>Research on the Hydraulic Excitation Characteristics of the Top Cover Caused by the Radial Installation Deviation of the Seal of a 1GW Francis Turbine</title><author>Jin, Kun ; Lu, Yonggang ; Lin, Peng ; Zhang, Zequan ; Li, Juan ; Zhao, Yun ; Huang, Xingxing ; Wang, Zhengwei</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c293t-af441e4df059fa02d005df927b574b70b1aad972c0d352003f51319fcc39c9ae3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Analysis</topic><topic>Carbon</topic><topic>Cavitation</topic><topic>Deviation</topic><topic>Efficiency</topic><topic>Excitation</topic><topic>Hydraulics</topic><topic>Hydroelectric power</topic><topic>Hydroelectric power stations</topic><topic>Internal flow</topic><topic>Investigations</topic><topic>Labyrinth seals</topic><topic>Monitoring</topic><topic>Pressure distribution</topic><topic>Simulation</topic><topic>Skewed distributions</topic><topic>Thrust bearings</topic><topic>Turbines</topic><topic>Turbulence models</topic><topic>Vortices</topic><topic>Water-power</topic><topic>Waveforms</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jin, Kun</creatorcontrib><creatorcontrib>Lu, Yonggang</creatorcontrib><creatorcontrib>Lin, Peng</creatorcontrib><creatorcontrib>Zhang, Zequan</creatorcontrib><creatorcontrib>Li, Juan</creatorcontrib><creatorcontrib>Zhao, Yun</creatorcontrib><creatorcontrib>Huang, Xingxing</creatorcontrib><creatorcontrib>Wang, Zhengwei</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Natural Science Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni)</collection><collection>ProQuest Central</collection><collection>ProQuest Central Essentials</collection><collection>Biological Science Collection</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>Natural Science Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>ProQuest Central Student</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Materials Science Database</collection><collection>Biological Sciences</collection><collection>Biological Science Database</collection><collection>Materials Science Collection</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><jtitle>Processes</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jin, Kun</au><au>Lu, Yonggang</au><au>Lin, Peng</au><au>Zhang, Zequan</au><au>Li, Juan</au><au>Zhao, Yun</au><au>Huang, Xingxing</au><au>Wang, Zhengwei</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Research on the Hydraulic Excitation Characteristics of the Top Cover Caused by the Radial Installation Deviation of the Seal of a 1GW Francis Turbine</atitle><jtitle>Processes</jtitle><date>2023-11-01</date><risdate>2023</risdate><volume>11</volume><issue>11</issue><spage>3172</spage><pages>3172-</pages><issn>2227-9717</issn><eissn>2227-9717</eissn><abstract>The radial installation deviation of the turbine runner will change the gap flow between the upper crown and the lower ring seal, which will affect the radial force of the runner and the hydraulic excitation characteristics of the top cover. This research focuses on the 1GW Francis turbine on the right bank of the Baihetan hydropower station. The pressure distribution along the circumference of the top cover was analyzed, and the effects of deviations on the specific generation of hydraulic excitation forces were studied. This research shows that the increase in radial deviation will slightly reduce the output and efficiency, and the radial force on the runner increases parabolically. When the radial deviation is 1.5 mm, the radial force is 5.9 times higher compared to the case without any deviation, and the radius of the fitting circle of the radial force behavior trajectory increases with the increase in radial deviation. In addition, the radial deviation has little effect on the internal flow of the runner and the pressure distribution in the upper crown chamber. The dominant frequency components at the upstream monitoring points include fn, 15 fn, 24 fn, and 30 fn. The dominant frequency components at the downstream monitoring points include the blade passing frequencies of 15 fn and 30 fn. However, with the increase in radial deviation, the fluctuation amplitudes exhibit an asymmetric distribution, the uniformity of the pressure distribution in the circumferential direction of the labyrinth seal area becomes significantly worse, and the waveform of the downstream monitoring points changes significantly and presents a non-uniform distribution in one rotation cycle.</abstract><cop>Basel</cop><pub>MDPI AG</pub><doi>10.3390/pr11113172</doi><orcidid>https://orcid.org/0000-0002-2671-9297</orcidid><orcidid>https://orcid.org/0000-0003-3983-4742</orcidid><orcidid>https://orcid.org/0000-0002-7333-8454</orcidid><oa>free_for_read</oa></addata></record> |
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subjects | Analysis Carbon Cavitation Deviation Efficiency Excitation Hydraulics Hydroelectric power Hydroelectric power stations Internal flow Investigations Labyrinth seals Monitoring Pressure distribution Simulation Skewed distributions Thrust bearings Turbines Turbulence models Vortices Water-power Waveforms |
title | Research on the Hydraulic Excitation Characteristics of the Top Cover Caused by the Radial Installation Deviation of the Seal of a 1GW Francis Turbine |
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