{"id":2197,"date":"2015-02-02T17:22:43","date_gmt":"2015-02-02T21:52:43","guid":{"rendered":"https:\/\/www.hidrasoftware.com\/?p=2197"},"modified":"2020-11-16T17:06:01","modified_gmt":"2020-11-16T21:36:01","slug":"scenarios-in-ariete-studying-different-water-hammer-control-methods","status":"publish","type":"post","link":"https:\/\/www.hidrasoftware.com\/en\/scenarios-in-ariete-studying-different-water-hammer-control-methods\/","title":{"rendered":"Scenarios in Ariete: Studying Different Water Hammer control Methods"},"content":{"rendered":"

The ability to analyze different alternatives for protection against water hammer effects in a water pipeline system, either supplied by gravity or supplied by pumping, is one of the main features of Ariete, our water hammer software, which through the <\/strong>\u201c<\/strong>Analysis Scenarios<\/strong>\u201d<\/strong> creation<\/strong> allows comparing the results, obtained in each of these scenarios, simultaneously.<\/p>\n

In this article, we present the characteristic aspects of Scenarios Management in Ariete, and we\u2019ll implement alternatives for protection against water hammer through an example of a pumping pipeline which suffers an accidental stoppage<\/a> for power supply failure into the respective pumping station.<\/p>\n

By default, when you create a new project in Ariete, the Pipeline and its upstream and downstream devices are created inside an analysis scenario called \u201cBase Scenario,\u201d which will be active while a new one is not created.<\/p>\n

The idea behind the Base Scenario is that, with it, the Original pipeline system, i.e.: with no water hammer control devices, will be modeled, with it being possible to change its name and description from the Scenarios Menu <\/em><\/strong>\u2192<\/em><\/strong> Edit Active Scenario:<\/em><\/strong><\/p>\n

\"Changing-Active-Scenario-general-Properties\"<\/p>\n

\nIn selecting the name for each scenario, it is important to note that it will be part of the chart\u2019s legend that is shown in the main window\u2019s longitudinal profile and is, therefore, advisable to use short names<\/strong> to avoid visually overloading of this chart.
\n<\/div><\/div>\n

For this example we\u2019ll modify the name to \u201c<\/strong>Original System.<\/strong>\u201d<\/strong><\/p>\n

Thus, the Original System scenario will contain the pumping pipeline system with no modifications (no control devices against water hammer effects), as we saw in this Article<\/a>.<\/p>\n

New Scenario Creation \u2013 One Way Water Surge Tank<\/h2>\n

We wish now to observe what effect would occur when installing a One Way Surge Tank<\/a><\/strong> in the control point at 5373 m pipeline\u2019s chainage and, to do so, a new scenario called <\/em><\/strong>\u201c<\/em><\/strong>One Way S.T.<\/em><\/strong>\u201d<\/em><\/strong> will be created through the Create New Scenario option at <\/em><\/strong>Scenarios menu.<\/strong><\/em><\/p>\n

Once created, this scenario will automatically become the Active one, which is confirmed from the list at the Ariete<\/strong>\u2019s main toolbar<\/strong>:<\/p>\n

\"New-Scenario-becomes-the-active-one\"<\/p>\n

By becoming an Active scenario<\/strong>, any modifications (adding water hammer control devices) will be effective and visible only in that scenario, <\/strong>and the remaining scenarios remain unchanged.<\/p>\n

\nThe idea of \u200b\u200bthe scenarios in Ariete is to facilitate the water hammer calculation results interpretation when different types of methods or devices are used in the search for pipeline system protection against this phenomenon.<\/p>\n

Any change in the pipeline\u2019s geometry or characteristics (diameter, wave speed, etc.) will be reflected in all scenarios, with the water hammer control devices used on each of them being the only difference between scenarios (and, of course, differences will exist in the respective results).
\n<\/div><\/div>\n

Thus, a One Way Surge Tank is added to this scenario (in this article<\/a> we explain how to add interior devices) by entering the following data:<\/p>\n

\"One-Way-Surge-Tank-Data\"<\/p>\n

When closing all the opened dialogs, the water surge tank symbol<\/strong> will be shown in Ariete\u2019s Main Window:<\/p>\n

\"One-way-surge-tank-for-new-water-hammer-scenario\"<\/p>\n

\nIf we switch the Active Scenario to the <\/strong>\u201c<\/strong>Original System<\/strong>\u201d<\/strong> one<\/strong>, we will see that the Surge Tank is not present, thus indicating the difference between the two existing scenarios.
\n<\/div><\/div>\n

When performing the Unsteady calculation<\/em><\/strong>, we\u2019ll obtain the results for our new Scenario:<\/p>\n

\"water-hammer-Results-for-One-way-surge-tank-scenario\"<\/p>\n

Comparing Results Between Scenarios<\/h2>\n

Having more than one scenario (in our case, two), we only need to activate the \u201cCompare results with other Scenario<\/strong>\u201d<\/strong> checkbox in the Results panel<\/strong>, to enable the list of existing scenarios in this Project, and then select and click on the respective scenario to compare<\/strong>. In our case, it will be the Original System<\/strong> scenario:<\/p>\n

\"comparing-water-hammer-scenarios-with-ariete-software\"<\/p>\n

In addition, by keeping the \u201cCompare results with other Scenario<\/strong>\u201d<\/strong> option active (checked)<\/strong>, a results charts for each control point will contain results for the selected scenarios besides the actual one:<\/p>\n

\"results-charts-for-two-water-hammer-scenarios\"<\/p>\n

Finally, it should be noted that Scenarios creation for Water Hammer calculation and analysis in Ariete has the following considerations:<\/p>\n

    \n
  • The maximum number of additional scenarios<\/strong> to the Base one that can be created in Ariete is three (3).<\/li>\n
  • When a new scenario is created, it must be taken into account that the characteristics of the Active scenario will be copied to the new one<\/strong>. In our example, if we would create a new scenario having the \u201cOne Way S.T.\u201d as active, the new scenario will include an interior device at chainage 5737, the one way surge tank. So, if you want to create a scenario without water hammer control devices, you must first change the Active Scenario (to Original System in this example) and then create the new scenario.<\/li>\n
  • To remove the results visualization of all selected scenarios at the same time, just uncheck the \u201cCompare results with other Scenario\u201d checkbox. <\/strong>Of course, when checked again, all selected scenarios results will be shown at once.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

    The ability to analyze different alternatives for protection against water hammer effects in a water pipeline system, either supplied by gravity or supplied by pumping, is one of the main features of Ariete, our water hammer software, which through the <\/strong>\u201c<\/strong>Analysis Scenarios<\/strong>\u201d<\/strong> creation<\/strong> allows comparing the results, obtained in each of these scenarios, simultaneously.<\/p>\n","protected":false},"author":1,"featured_media":2198,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[119],"tags":[123,122],"class_list":["post-2197","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-water-hammer","tag-water-hammer-control-devices-en","tag-water-hammer-scenario-analysis-en","post-wrapper","thrv_wrapper"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.hidrasoftware.com\/en\/wp-json\/wp\/v2\/posts\/2197","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hidrasoftware.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hidrasoftware.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hidrasoftware.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hidrasoftware.com\/en\/wp-json\/wp\/v2\/comments?post=2197"}],"version-history":[{"count":4,"href":"https:\/\/www.hidrasoftware.com\/en\/wp-json\/wp\/v2\/posts\/2197\/revisions"}],"predecessor-version":[{"id":7891,"href":"https:\/\/www.hidrasoftware.com\/en\/wp-json\/wp\/v2\/posts\/2197\/revisions\/7891"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hidrasoftware.com\/en\/wp-json\/wp\/v2\/media\/2198"}],"wp:attachment":[{"href":"https:\/\/www.hidrasoftware.com\/en\/wp-json\/wp\/v2\/media?parent=2197"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hidrasoftware.com\/en\/wp-json\/wp\/v2\/categories?post=2197"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hidrasoftware.com\/en\/wp-json\/wp\/v2\/tags?post=2197"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}