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<?xml-stylesheet type="text/xsl" href="https://communities.bentley.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/"><channel><title>evento transitorio spegnimento pompa velocità variabile</title><link>https://communities.bentley.com/products/hydraulics___hydrology/f/haestad-hydraulics-and-hydrology-forum/220770/evento-transitorio-spegnimento-pompa-velocita-variabile</link><description>buonasera, ho riscontrato due errori in questa simulazione: 
 1) problema cavitazione 
 2) analizzando i risultati dell&amp;#39;analisi ho notato che le portate (flow) delle tubazioni a valle della pompa spenta non tendono mai a 0 
 ho pensato: 
 per risolvere</description><dc:language>en-US</dc:language><generator>Telligent Community 12</generator><item><title>RE: evento transitorio spegnimento pompa velocità variabile</title><link>https://communities.bentley.com/thread/676922?ContentTypeID=1</link><pubDate>Thu, 14 Oct 2021 17:17:17 GMT</pubDate><guid isPermaLink="false">6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:3ec77394-1c4c-462f-a419-6dce4b48f428</guid><dc:creator>Scott Kampa</dc:creator><description>&lt;p&gt;Hello Giovanni,&lt;/p&gt;
&lt;p&gt;For the cavitation, this occurs at a point downstream of the pump. This may be a good place to put protection equipment, like an air valve. You can also test other types of protection, like surge tanks or hydropneumatic tanks. The following links have information on these:&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/3400/modeling-reference---air-valves"&gt;https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/3400/modeling-reference---air-valves&lt;/a&gt;&lt;br /&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/3104/modeling-reference---hydropneumatic-tanks"&gt;https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/3104/modeling-reference---hydropneumatic-tanks&lt;/a&gt;&lt;br /&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/39618/modeling-reference---surge-tanks"&gt;https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/39618/modeling-reference---surge-tanks&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;You can find some additional information on HAMMER elements or workflows in the general TechNotes and FAQs page here:&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/4164/hammer-technotes-and-faqs"&gt;https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/4164/hammer-technotes-and-faqs&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;For the flow rates, the flow from the pump appears to be zero. If there is flow in some of the pipes, it will likely be near points in the system with vapor forming. In these locations, you can see water moving away from an expanding area of vapor or air and see water moving toward a node as the vapor or air decreases.&lt;/p&gt;
&lt;p&gt;For the sample files, these are typically found here: C:\Program Files (x86)\Bentley\HAMMER\Samples.&lt;/p&gt;
&lt;p&gt;----&lt;/p&gt;
&lt;p&gt;Machine translation&lt;/p&gt;
&lt;p&gt;Per la cavitazione, questa avviene in un punto a valle della pompa. Questo potrebbe essere un buon posto per mettere dispositivi di protezione, come una valvola dell&amp;#39;aria. Puoi anche testare altri tipi di protezione, come autoclavi o serbatoi idropneumatici. I seguenti collegamenti contengono informazioni su questi:&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/3400/modeling-reference---air-valves"&gt;https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/3400/modeling-reference---air-valves&lt;/a&gt;&lt;br /&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/3104/modeling-reference---hydropneumatic-tanks"&gt;https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/3104/modeling-reference---hydropneumatic-tanks&lt;/a&gt;&lt;br /&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/39618/modeling-reference---surge-tanks"&gt;https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/39618/modeling-reference---surge-tanks&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;&amp;Egrave; possibile trovare alcune informazioni aggiuntive sugli elementi o sui flussi di lavoro HAMMER nella pagina TechNotes e FAQ generali qui:&lt;/p&gt;
&lt;p&gt;&lt;a href="/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/4164/hammer-technotes-and-faqs"&gt;https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/4164/hammer-technotes-and-faqs&lt;/a&gt;&lt;/p&gt;
&lt;p&gt;Per le portate, il flusso dalla pompa sembra essere zero. Se c&amp;#39;&amp;egrave; flusso in alcuni tubi, sar&amp;agrave; probabilmente vicino a punti nel sistema con formazione di vapore. In queste posizioni, puoi vedere l&amp;#39;acqua allontanarsi da un&amp;#39;area in espansione di vapore o aria e vedere l&amp;#39;acqua muoversi verso un nodo mentre il vapore o l&amp;#39;aria diminuiscono.&lt;/p&gt;
&lt;p&gt;Per i file di esempio, questi si trovano in genere qui: C:\Program Files (x86)\Bentley\HAMMER\Samples.&lt;/p&gt;
&lt;p&gt;&lt;/p&gt;
&lt;p&gt;Regards,&lt;/p&gt;
&lt;p&gt;Scott&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>