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Experimental assessment of fluid hammer prediction algorithms
Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
2018 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Fluid hammer is a problem, which may lead to catastrophic consequences and many engineers have a deficiency in competence when it comes to its prediction. This study´s objective is to assess various fluid hammer prediction models, to evaluate how substantial pressure thrusts would affect a system and to verify the analytical results toward experimental data. The experimental data are collected from a novel experimental rig constituted of tubes, valves and data acquisition (DAQ) equipment.

The literature review reveals several algorithms, analytical calculations and items of transient numerical analysis software (simulation software) for this purpose. In this study, the fluid hammer prediction is performed by analytical and numerical analyses using the commercial mathematic software suite Maple 2017.

Assessments reveal that the results differed between analytical calculation, simulation and experimental data. The experimental activities yield the lowest pressure thrust magnitude and transient analysis predicted the highest. For the sake of conservative prediction, use of simulation software is recommended.

Abstract [sv]

Vätskeslag är ett problem som kan ge katastrofala följder och många ingenjörer saknar kompetens när det handlar om att förutspå det. Målet med denna studie är att utvärdera olika metoder för att utvärdera hur betydande tryckstötarna blir i ett system samt att verifiera analytiska data gentemot ett experiment. Datan för experimentet fås från en testrigg som består av tuber, ventiler och instrumentering.

Av litteraturstudien framgår att det finns flertalet algoritmer, analytiska beräkningar och transienta numeriska mjukvaror (simuleringsprogram) till detta syfte. I den här studien värderas och jämförs vätskeslag genom analytiska och numeriska analyser med hjälp av mjukvarupaketet Maple. 2017

Utvärdering av resultaten visar att de varierar med de olika metoderna. Experimentet gav de lägsta tryckstötarna och simuleringarna gav de högsta. Därför rekommenderar jag att för säkerhets skull använda simuleringsprogram.

Place, publisher, year, edition, pages
2018.
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:lnu:diva-74921OAI: oai:DiVA.org:lnu-74921DiVA, id: diva2:1214903
Supervisors
Available from: 2018-06-07 Created: 2018-06-07 Last updated: 2018-06-07Bibliographically approved

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File name FULLTEXT01.pdfFile size 18644 kBChecksum SHA-512
43d2ab9a11bb469a1da2e4f6be3774a9591fe16aec7fd6411410bdd5ebbb52a95ac5f4e178e39c3d6b09aa59100fb5c3bfecb451fba235a108c692012187b76b
Type fulltextMimetype application/pdf

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Kalmar Maritime Academy
Energy Engineering

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CiteExportLink to record
Permanent link

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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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  • text
  • asciidoc
  • rtf