{"id":466,"date":"2020-03-10T21:44:57","date_gmt":"2020-03-11T01:44:57","guid":{"rendered":"http:\/\/fgosselin.meca.polymtl.ca\/?p=466"},"modified":"2020-05-12T09:55:34","modified_gmt":"2020-05-12T13:55:34","slug":"vibration-of-a-high-head-francis-turbine-runner","status":"publish","type":"post","link":"https:\/\/fgosselin.meca.polymtl.ca\/?p=466&lang=en","title":{"rendered":"Vibration of a high-head Francis turbine runner"},"content":{"rendered":"\n<ul class=\"wp-block-gallery columns-1 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><li class=\"blocks-gallery-item\"><figure><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"584\" height=\"348\" data-attachment-id=\"467\" data-permalink=\"https:\/\/fgosselin.meca.polymtl.ca\/?attachment_id=467\" data-orig-file=\"https:\/\/i0.wp.com\/fgosselin.meca.polymtl.ca\/wp-content\/uploads\/2020\/03\/spindisk-1.jpg?fit=752%2C448&amp;ssl=1\" data-orig-size=\"752,448\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"spindisk\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/fgosselin.meca.polymtl.ca\/wp-content\/uploads\/2020\/03\/spindisk-1.jpg?fit=584%2C348&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/fgosselin.meca.polymtl.ca\/wp-content\/uploads\/2020\/03\/spindisk-1.jpg?resize=584%2C348\" alt=\"\" data-id=\"467\" data-link=\"http:\/\/fgosselin.meca.polymtl.ca\/?attachment_id=467\" class=\"wp-image-467\" srcset=\"https:\/\/i0.wp.com\/fgosselin.meca.polymtl.ca\/wp-content\/uploads\/2020\/03\/spindisk-1.jpg?w=752&amp;ssl=1 752w, https:\/\/i0.wp.com\/fgosselin.meca.polymtl.ca\/wp-content\/uploads\/2020\/03\/spindisk-1.jpg?resize=300%2C179&amp;ssl=1 300w, https:\/\/i0.wp.com\/fgosselin.meca.polymtl.ca\/wp-content\/uploads\/2020\/03\/spindisk-1.jpg?resize=500%2C298&amp;ssl=1 500w\" sizes=\"auto, (max-width: 584px) 100vw, 584px\" \/><\/figure><\/li><\/ul>\n\n\n\n<p class=\"has-drop-cap\">The runner of a high-head Francis hydraulic turbine is flattened and has vibration modes resembling those of a disc. When the runner rotates in water, the vibrating waves propagating in the direction of rotation and against rotation interact differently with water. There is therefore a doubling of natural frequencies. This implies that the turbine designer must work harder to identify these frequencies and ensure that no resonance phenomenon will occur on the turbine in operation.<br>This task is now (slightly) simplified by the new analytical model developed by Max Louyot as part of his master&#8217;s degree in partnership with Andritz Hydro Canada, published in the <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S088997461930814X\">Journal of Fluids and Structures.<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The runner of a high-head Francis hydraulic turbine is flattened and has vibration modes resembling those of a disc. When the runner rotates in water, the vibrating waves propagating in the direction of rotation and against rotation interact differently with &hellip; <a href=\"https:\/\/fgosselin.meca.polymtl.ca\/?p=466&#038;lang=en\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[49],"class_list":["post-466","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-publication"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p66sKU-7w","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/fgosselin.meca.polymtl.ca\/index.php?rest_route=\/wp\/v2\/posts\/466","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fgosselin.meca.polymtl.ca\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fgosselin.meca.polymtl.ca\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fgosselin.meca.polymtl.ca\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fgosselin.meca.polymtl.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=466"}],"version-history":[{"count":3,"href":"https:\/\/fgosselin.meca.polymtl.ca\/index.php?rest_route=\/wp\/v2\/posts\/466\/revisions"}],"predecessor-version":[{"id":471,"href":"https:\/\/fgosselin.meca.polymtl.ca\/index.php?rest_route=\/wp\/v2\/posts\/466\/revisions\/471"}],"wp:attachment":[{"href":"https:\/\/fgosselin.meca.polymtl.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=466"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fgosselin.meca.polymtl.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=466"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fgosselin.meca.polymtl.ca\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=466"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}