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Simulations of a self-stabilizing fully submerged hydrofoil
KTH, School of Engineering Sciences (SCI), Mathematics (Dept.), Mathematics (Div.).
2023 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Simulering av ett självstabiliserande helt nedsänkt bärplanssystem (Swedish)
Abstract [en]

Two models of a self-stabilizing hydrofoil system is developed where the effects from the struts and hydrofoil give torques for angular rotations. Lifting line theory for the hydrofoil which can twist is used. Nonlinear versions of the models are also developed and compared to find that the linear models use valid approximations. Backward Differentiation Formula is used to get numerical solutions, and eigenvalues of linear system matrices are used to get stability regions. The models did not accurately capture what has been seen in testing.

Abstract [sv]

Två modeller för ett självstabiliserande bärplanssystem utvecklas där effekter från stöttor och bärplan ger vridmoment för vinkelrotationer. Lyftande linjeteori för det skevande bärplanet används. Icke-linjära versioner av modellerna tas också fram och jämförs för att finna att de linjära modellerna använder giltiga approximationer. Backward Differentiation Formula används för att fram numeriska lösningar, och egenvärden i det linjära systemetsmatriser används för att hitta stabilitetsregioner. Modellerna fångade inte korrekt vad som har setts i testning.

Place, publisher, year, edition, pages
2023. , p. 94
Series
TRITA-SCI-GRU ; 2023:395
Keywords [en]
Hydrofoil, Self-Stabilizing, Lifting Line Theory, Fluid Mechanics, Numerical Methods, Backward Differentiation Formula, Fully Submerged Hydrofoil
Keywords [sv]
Bärplan, bärplansbåt, självstabiliserande, lyftande linjeteori, strömningsme- kanik, numeriska metoder, Backward Differentiation Formula, fullt nedsänkt bärplan
National Category
Computational Mathematics
Identifiers
URN: urn:nbn:se:kth:diva-339552OAI: oai:DiVA.org:kth-339552DiVA, id: diva2:1811867
External cooperation
Mantaray Hydrofoil Craft AB
Subject / course
Scientific Computing
Educational program
Master of Science - Computer Simulation for Science and Engineering
Supervisors
Examiners
Available from: 2023-11-27 Created: 2023-11-14 Last updated: 2023-11-27Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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