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Feasibilitetsstudie fartygsframdrift med ångjetstråle: En förstudie om de fysikaliska och tekniska möjligheterna att framdriva fartyg med ångjetstråle
Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
Linnaeus University, Faculty of Technology, Kalmar Maritime Academy.
2018 (Swedish)Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesisAlternative title
Feasibility Study ship propulsion with steamjet : A pre-study about the physical and technical opportunities to propel ships with steamjet (English)
Abstract [sv]

En framtida alternativ framdrivningsmetod av fartyg skulle kunna vara en ångjetstråle som expanderas via en ejektor. Syftet med studien var att utföra ett experiment med två olika typer av utloppsmunstycken på ejektorns diffusor, för att därigenom ta reda på vilken design som lämpar sig för denna framdrivningsmetod samt vilken tryckkraft som är möjlig att uppnå. Studiens resultat är tänkt att användas som underlag för fortsatta studier om fartygsframdrift med ångjetstråle via en ejektor, för att eventuellt kunna öka energieffektiviteten i jämförelse med dagens framdrivningsmetoder. Resultatet visar att en cirkulär strålbild ger högst tryckkraft trots ett lägre inloppstryck vid en vattentemperatur på 70 °C i jämförelse med en platt strålbild vid ett högre inloppstryck och samma temperatur. Experimentet gav ingen mätbar tryckkraft vid expansion av fuktig ånga med ett tryck på 3 MPa och en temperatur på 150 °C.

Abstract [en]

A future alternative propulsion method of ships could be a steam jet that is expanded via an ejector. The purpose of the study was to conduct an experiment on two different types of outlet nozzles on the diffuser of the ejector. This was carried out to find which design that is suitable for this propulsion method and what propulsion force that was possible to achieve. The result of the study was then thought to be used as a basis for further studies of steam jet propulsion through an ejector, to possibly increase the energy efficiency in comparison with today's propulsion methods. The result shows that a circular jet provides maximum propulsion force despite a lower inlet pressure and a water temperature at 70 °C in comparison with a flat jet at higher inlet pressures and equal temperature. The experiment gave no measurable propulsion force when expanding wet steam at a pressure of 3 MPa and a temperature at 150 °C.

Place, publisher, year, edition, pages
2018. , p. 24
Keywords [en]
Steam jet, ejector, de Laval nozzle, ship, propulsion
Keywords [sv]
Ångstråle, ejektor, lavaldysa, fartyg, framdrift
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:lnu:diva-74396OAI: oai:DiVA.org:lnu-74396DiVA, id: diva2:1206963
Subject / course
Chief Engineer
Educational program
Marine Engineering Programme (4 years) with onboard practical training placement, 180 credits
Supervisors
Examiners
Available from: 2018-05-22 Created: 2018-05-18 Last updated: 2018-05-22Bibliographically approved

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Feasibilitetsstudie fartygsframdrift med ångjetstråle(10911 kB)77 downloads
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Holmquist, AdamEmanuelsson, Oscar
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CiteExportLink to record
Permanent link

Direct link
Cite
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
  • html
  • text
  • asciidoc
  • rtf